US Patent No: 7,957,265

Number of patents in Portfolio can not be more than 2000

Systems and method for orthogonal frequency divisional multiplexing

Stats

ALSO PUBLISHED AS: 20080049604
ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprising: a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals; a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals; a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform to the data transmitted by the transmitter; and a controller programmed to instruct the transmitter to transmit a coarse timing adjustment followed by at least one secondary timing adjustment, wherein the secondary timing adjustment is a fine tuning adjustment with respect to the coarse timing adjustment.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
HTC CORPORATIONTAOYUAN COUNTY669

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brede, Jeffrey Eden Prairie, MN 104 2378
Geile, Michael J Loveland, OH 174 4039

Cited Art

Patent Info (Count) # Cites Year
 
HTC CORPORATION (125)
6,334,219 Channel selection for a hybrid fiber coax network 81 1996
6,292,651 Communication system with multicarrier transport distribution network between a head end terminal and remote units 51 1997
6,418,558 Hybrid fiber/coax video and telephony communication 81 1997
6,275,990 Transport of payload information and control messages on multiple orthogonal carriers spread throughout substantially all of a frequency bandwith 128 1999
6,279,158 Dynamic bandwidth allocation 80 1999
6,282,683 Communication system with multicarrier telephony transport 40 1999
6,330,241 Multi-point to point communication system with remote unit burst identification 69 1999
6,336,201 Synchronization in a communications system with multicarrier telephony transport 63 1999
6,366,585 Distributed control in a communication system 68 1999
6,434,583 Fast fourier transform apparatus and method 46 1999
6,477,354 Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band 35 1999
6,487,405 Communication system with multicarrier telephony transport for controlling a plurality of service units 42 1999
6,535,715 Hybrid/fiber coax video and telephony communication system with poly-phase filtering 46 1999
6,594,322 Method of distributed loop control for a multicarrier telephony transport 59 1999
6,603,822 Communicating errors in a telecommunications system 48 1999
6,606,351 Ingress protection in a communication system with orthogonal carriers 32 1999
6,415,133 Acquisition and tracking in communication system with multicarrier telephony transport 63 1999
6,467,092 Method for adjusting power in a communication system with multicarrier telephony transport 79 1999
6,510,229 Communication system with multicarrier telephony transport 33 1999
2002/0098,797 ACQUISITION AND TRACKING IN COMMUNICATION SYSTEM WITH MULTICARRIER TELEPHONY TRANSPORT 30 1999
2002/0098,798 COMMUNICATION SYSTEM WITH MULTICARRIER TELEPHONY TRANSPORT 29 1999
7,002,898 Asymmetrical transport of data 56 2000
7,123,592 Dynamic allocation of transmission bandwidth in a communication system 28 2001
7,069,577 Dynamic bandwidth allocation 70 2001
6,608,835 Communication system with multicarrier telephony transport 43 2002
6,662,367 Poly-phase filters in multicarrier communication systems 44 2002
7,310,522 Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communication 31 2002
2002/0105,950 Computer data transmission over a telecommunications network 34 2002
2002/0107,979 Computer data transmission over a telecommunictions network 32 2002
2004/0042,387 Communication system with multicarrier telephony transport 53 2002
2003/0032,390 Acquisition and tracking in communication system with multicarrier telephony transport 35 2002
2007/0183,591 DYNAMIC BANDWIDTH ALLOCATION 32 2006
2007/0116,209 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 29 2007
2007/0115,803 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
2007/0157,277 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
2007/0162,943 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
2007/0157,278 CONTENTION-BASED ACCESS TO TONES IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WAVEFORM 25 2007
2007/0110,096 CONTENTION-BASED ACCESS TO TONES IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WAVEFORM 31 2007
2007/0217,324 DISTRIBUTED CONTROL IN SYNCHRONIZING REMOTE UNITS TO HOST UNIT 24 2007
2007/0201,345 DISTRIBUTED CONTROL OF CARRIER FREQUENCY IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 24 2007
2007/0217,325 DISTRIBUTED CONTROL IN SYNCHRONIZING REMOTE UNITS TO HOST UNIT 24 2007
2007/0110,220 DISTRIBUTED CONTROL OF CARRIER FREQUENCY IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 24 2007
2007/0201,628 DISTRIBUTED CONTROL OF POWER IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 27 2007
2007/0206,491 DISTRIBUTED CONTROL OF POWER IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 25 2007
2007/0195,687 SYMBOL ALIGNMENT IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 24 2007
2007/0204,317 SYMBOL ALIGNMENT IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 24 2007
2007/0174,890 SYNCHRONIZED MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION 27 2007
2008/0037,663 TIMING AND SYMBOL ALIGNMENT IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
7,492,791 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 27 2007
7,539,126 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 24 2007
2007/0147,229 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 24 2007
2008/0273,607 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 26 2007
7,352,690 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 25 2007
7,426,177 Round trip delay adjustment in multipoint-to-point communication using orthogonal frequency division multiplexing 26 2007
7,280,564 Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing 53 2007
7,352,779 System for multi-frame alignment 26 2007
2007/0280,099 MULTIFRAME ALIGNMENT IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 25 2007
2007/0186,260 METHODS FOR MULTIFRAME ALIGNMENT 24 2007
2008/0123,514 METHODS FOR MULTIFRAME ALIGNMENT 24 2007
7,440,391 Method and system for dynamic bandwidth allocation 24 2007
2007/0186,261 DATA-SPECIFIC BANDWIDTH ALLOCATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHGONAL FREQUENCY DIVISION MULTIPLEXING 27 2007
2008/0043,612 COARSE AND FINE SYNCHRONIZATION ADJUSTMENTS 25 2007
7,355,963 Tone allocation in multipoint-to-point communication using orthgonal frequency division multiplexing 25 2007
2008/0049,599 TONE HOPPING IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM 27 2007
7,420,913 Method for tone hopping in a multipoint-to-point orthogonal frequency division multiplexing communication system 24 2007
2007/0286,240 GUARD TONES IN A MULTI-POINT TO POINT ORTHOGINAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 24 2007
2007/0195,689 METHOD AND SYSTEM FOR ADAPTIVE MODULATION 24 2007
2007/0201,346 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHGONAL FREQUENCY DIVISION MULTIPLEXING AND IDENTIFICATION CODES 28 2007
2007/0201,347 USE OF GUARD BANDS IN MULTIPOINT-TO-POINT ORTHGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 24 2007
2007/0201,348 USE OF IDENTIFIER OF REMOTE UNIT FOR DOWNSTREAM SIGNALS 25 2007
2007/0201,573 SYSTEM FOR VARIABLE FORWARD ERROR CORRECTION IN A MULTIPOINT TO POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 24 2007
2007/0206,693 ADAPTIVE MODULATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 25 2007
7,391,711 Method and system for adaptive modulation 25 2007
2007/0211,617 VARIABLE ERROR CORRECTION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
7,417,944 Method for orderwire modulation 24 2007
7,436,812 System for oderwire modulation 24 2007
2007/0223,363 CONTROL MODULATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 22 2007
7,394,753 Training premable in multipoint-to-point communication using orthogonal frequency division multiplexing 24 2007
2007/0230,325 METHOD AND SYSTEM FOR TRAINING SEQUENCES 22 2007
7,355,964 Systems for contention-based bandwidth requests in orthogonal frequency division multiplexing systems 25 2007
2007/0237,070 METHODS FOR CONTENTION-BASED BANDWIDTH REQUESTS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS 27 2007
2007/0237,182 CONTENTION-BASED ACCESS IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 22 2007
2007/0242,597 SCANNING BY REMOTES IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
7,391,712 Method and system for forward-looking tone allocation 27 2007
7,443,784 Methods and systems for tone hopping 24 2007
2007/0274,200 REMOTE BAND SCANNING IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULITIPLEXING COMMUNICATION 24 2007
2007/0274,202 FORWARD-LOOKING TONE ALLOCATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 23 2007
7,385,916 System for multiple use subchannels 25 2007
2007/0253,500 METHOD FOR MULTIPLE USE SUBCHANNELS 27 2007
7,414,960 Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing 24 2007
2007/0263,665 SYSTEMS FOR CONTENTION-BASED BANDWIDTH REQUESTS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS 25 2007
7,420,914 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 24 2007
2008/0025,202 SCANNING BY REMOTES IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 24 2007
2008/0025,284 SYSTEM FOR MULTI-FRAME ALIGNMENT 24 2007
7,414,961 System and method for multiframe alignment in a multipoint-to-point orthogonal frequency division multiplexing system 24 2007
2008/0025,201 SYSTEM AND METHOD FOR RANGING AND ROUND TRIP DELAY ADJUSTMENT IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 25 2007
7,400,572 System and method for contention based tones in a multipoint-to-point orthogonal frequency division multiplexing system 24 2007
2008/0031,127 SYSTEM AND METHOD FOR ORDERWIRE MODULATION IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 24 2007
7,408,873 System and method for round trip delay adjustment in a multipoint-to-point orthogonal frequency division multiplexing system 26 2007
2008/0037,414 SYSTEM AND METHOD FOR MULTIFRAME ALIGNMENT IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 24 2007
2008/0037,415 SYSTEM AND METHOD FOR RANGING IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 24 2007
2008/0040,763 SYSTEM AND METHOD FOR CONTENTION BASED TONES IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 25 2007
2008/0043,704 SYSTEM AND METHOD FOR ORDERWIRE MODULATION IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 27 2007
2008/0049,604 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 25 2007
2008/0049,856 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0049,860 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0056,119 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 25 2007
2008/0056,398 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0063,010 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0082,598 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 25 2007
2008/0225,690 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 25 2007
2008/0225,691 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 25 2007
2008/0225,692 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0240,214 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0240,410 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2008/0253,435 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 24 2007
2009/0225,818 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 14 2007
2009/0067,516 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 13 2007
7,697,453 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 14 2008
7,706,349 Methods and systems for selecting modulation in an orthogonal frequency division multiplexing system 15 2008
2009/0074,095 SYSTEM FOR MULTI-FRAME ALIGNMENT 13 2008
2009/0080,505 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 13 2008
2009/0080,554 TONE ALLOCATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 13 2008
2009/0316,816 METHOD FOR MULTIPLE USE SUBCHANNELS 17 2009
2010/0014,605 SYSTEM FOR MULTIPLE USE SUBCHANNELS 14 2009
 
U.S. Philips Corporation (17)
4,395,768 Error correction device for data transfer system 40 1981
4,472,802 System of transmitting information between a central station and sub-stations 108 1982
4,618,955 Digital data transmission system 44 1984
4,985,902 Decision feedback equalizer and a method of operating a decision feedback equalizer 98 1989
5,073,899 Transmission system for sending two signals simultaneously on the same communications channel 219 1989
5,371,761 Transmission system and receiver for this system 60 1993
5,416,801 Digital signal transmission system based on partitioning of a coded modulation with concatenated codings 112 1993
5,550,812 System for broadcasting and receiving digital data, receiver and transmitter for use in such system 94 1993
5,446,918 Cable network and modulator-demondulator arrangement for such a network 35 1993
5,559,833 Transmission system comprising timing recovery 75 1994
5,504,775 Multi-user spread spectrum communication system 127 1994
5,416,767 Method of transmitting a data stream, transmitter and receiver 68 1994
5,579,321 Telecommunication system and a main station and a substation for use in such a system 44 1994
5,619,504 Telecommunication system and a main station for use in such a system 74 1994
5,509,003 TDM data communications network wherein each data frame is divided into respective lower rate sub-frames for respective sets of substations, and main station and substation for use therein 50 1994
5,581,554 Multiple access telecommunication network 27 1994
5,548,582 Multicarrier frequency hopping communications system 140 1994
 
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY (15)
4,709,418 Wideband cable network 197 1983
4,642,806 Communications network having a single node and a plurality of outstations 96 1984
4,651,330 Multipoint data communications 47 1984
4,881,243 Signal timing circuits 42 1985
4,975,899 Optical broadcast network 56 1988
5,010,586 Optical two-way transmission system with loop reflector modulator 38 1988
5,153,764 Control of optical systems 34 1989
5,138,635 Network clock synchronization 37 1990
4,977,593 Optical communications network 119 1990
5,063,595 Optical communications network 52 1990
5,086,470 Scrambling in digital communications network using a scrambled synchronization signal 47 1990
5,173,899 TDMA communications network of transmitting information between a central station and remote stations 84 1990
5,142,532 Communication system 108 1990
5,245,459 Optical communications systems 39 1991
5,341,365 Passive optical network 43 1992
 
SCIENTIFIC-ATLANTA, INC. (13)
4,466,017 Sync suppression scrambling of television signals for subscription TV 74 1981
4,642,688 Method and apparatus for creating encrypted and decrypted television signals 100 1985
4,912,721 Cable television spread spectrum data transmission apparatus 116 1988
5,153,763 CATV distribution networks using light wave transmission lines 77 1989
5,191,459 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 141 1989
5,235,619 Cable television radio frequency subscriber data transmission apparatus and RF return method 195 1990
5,255,086 Method and apparatus for RF data transfer in a CATV system 133 1990
5,225,902 Automatic frequency selection in a bi-directional cable television system 154 1991
5,262,883 CATV distribution networks using light wave transmission lines 55 1992
5,499,241 Broadband communications system 143 1993
5,594,726 Frequency agile broadband communications system 206 1994
5,581,555 Reverse path allocation and contention resolution scheme for a broadband communications system 135 1995
5,719,872 Reverse path allocation and contention resolution scheme for a broadband communications system 119 1996
 
LUCENT TECHNOLOGIES INC. (12)
4,688,210 Method of and arrangement for synchronizing the receiver arrangements in a digital multiplex transmission system 168 1986
4,799,252 Digital radio transmission system 114 1988
RE33900 Error monitoring in digital transmission systems 117 1989
5,570,364 Control for multimedia communication on local access table 31 1994
5,621,753 Digital communication system and a primary station for use in such a system 60 1994
5,602,836 Multiple access cellular communication with circular interleaving and reduced dropped-packet runlengths 139 1994
5,631,846 Upstream communications for interactive networks 64 1995
6,055,242 Method and apparatus enabling synchronous transfer mode, variable length and packet mode access for multiple services over a broadband communication network 97 1997
6,041,051 Method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network utilizing an adaptive digital access protocol 78 1997
6,028,933 Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network 135 1997
6,349,138 Method and apparatus for digital transmission incorporating scrambling and forward error correction while preventing bit error spreading associated with descrambling 58 1997
6,075,787 Method and apparatus for messaging, signaling, and establishing a data link utilizing multiple modes over a multiple access broadband communications network 183 1997
 
MOTOROLA, INC. (12)
5,038,342 TDM/FDM communication system supporting both TDM and FDM-only communication units 70 1989
4,977,612 Channel selection in a multi-frequency radio data communication system 125 1989
5,091,906 Quasi-duplex radio system using bi-directional hole extension 67 1989
5,249,305 Radio frequency error detection and correction system 37 1991
5,297,186 Device and method for on-line adaptive selection of baud rate and carrier frequency 85 1991
5,280,630 Method and apparatus for dynamic channel allocation 146 1992
5,204,874 Method and apparatus for using orthogonal coding in a communication system 121 1992
5,351,245 Bit error rate detection method 39 1993
5,533,008 Method and apparatus for providing a communication system infrastructure 97 1995
5,499,273 Method and apparatus for symbol clock recovery from signal having wide frequency possibilities 34 1995
5,793,772 Method and apparatus for synchronizing timing of components of a telecommunication system 72 1995
6,141,546 Mobile telephone systems 32 1997
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (10)
4,769,761 Apparatus and method for isolating and predicting errors in a local area network 81 1986
4,975,916 Character snychronization 55 1988
4,991,133 Specialized communications processor for layered protocols 145 1988
4,942,602 Coordinated transfer of voice and information through a network of digital switches 67 1989
5,347,632 Reception system for an interactive computer network and method of operation 813 1989
5,331,642 Management of FDDI physical link errors 90 1992
5,299,201 Method and apparatus for isolating faults in a network having serially connected links 60 1993
5,321,542 Control method and apparatus for wireless data link 149 1993
5,519,706 Dynamic user registration method in a mobile communications network 143 1994
6,338,091 System for optimistic transmission flow control including receiver data discards upon inadequate buffering condition 26 1997
 
TEXAS INSTRUMENTS INCORPORATED (9)
6,055,268 Multimode digital modem 177 1996
6,002,722 Multimode digital modem 161 1996
5,910,970 MDSL host interface requirement specification 156 1996
5,987,061 Modem initialization process for line code and rate selection in DSL data communication 143 1996
6,021,158 Hybrid wireless wire-line network integration and management 137 1996
6,038,251 Direct equalization method 60 1996
6,044,107 Method for interoperability of a T1E1.4 compliant ADSL modem and a simpler modem 179 1996
7,068,678 Method and apparatus for coordinating multi-point to point communications in a multi-tone data transmission system 52 2002
7,079,549 Method and apparatus for coordinating multi-point to point communications in a multi-tone data transmission system 27 2002
 
Bell Telephone Laboratories, Incorporated (8)
4,191,860 Data base communication call processing method 386 1978
4,316,284 Frame resynchronization circuit for digital receiver 124 1980
4,316,285 Framing circuit for digital receiver 54 1980
4,397,020 Error monitoring in digital transmission systems 139 1981
4,488,004 Providing feature transparency between a plurality of PBXs 79 1982
4,488,294 Establishing and supporting data traffic in private branch exchanges 49 1982
4,763,317 Digital communication network architecture for providing universal information services 385 1985
4,727,575 State control for a real-time system utilizing a nonprocedural language 42 1985
 
GENERAL INSTRUMENT CORPORATION (8)
4,533,948 CATV Communication system 177 1982
4,574,305 Remote hub television and security systems 124 1983
5,125,100 Optimal signal synthesis for distortion cancelling multicarrier systems 67 1990
5,430,799 Multichannel television signal scrambling and descrambling system and method 34 1994
5,754,650 Simultaneous multichannel television access control system and method 75 1995
5,864,621 Broadband television scrambling and descrambling system 32 1996
6,426,983 Method and apparatus of using a bank of filters for excision of narrow band interference signal from CDMA signal 80 1998
2001/0001,616 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 55 2000
 
MOTOROLA MOBILITY LLC (8)
5,323,391 Multi-channel digital transmitter and receiver 96 1993
5,446,727 Method and apparatus for time aligning signals for reception in a code-division multiple access communication system 121 1993
6,157,669 Method and apparatus for preempting burst frequency assignments in a frequency-hopping communication system 65 1994
5,790,607 Apparatus and method for recovery of symbol timing for asynchronous data transmission 38 1995
5,699,365 Apparatus and method for adaptive forward error correction in data communications 171 1996
6,219,840 Method for assigning communication resources in a communication system 52 1996
5,802,044 Multicarrier reverse link timing synchronization system, device and method 105 1996
5,828,660 Multiple user communication system, device and method with overlapping uplink carrier spectra 55 1996
 
NEC CORPORATION (8)
4,661,945 Differential coding system and apparatus therefor 33 1984
4,621,355 Method of synchronizing parallel channels of orthogonally multiplexed parallel data transmission system and improved automatic equalizer for use in such a transmission system 47 1984
4,613,975 Selective fading protection system 40 1984
4,575,682 Circuit for establishing accurate sample timing 36 1984
4,677,647 Synchronization of multichannel receiver based on higher quality channels 37 1985
4,827,473 Packet switching system 35 1987
5,423,067 Digital mobile communications system and method for providing intensity/coverage reference maps using base stations and mobile stations 108 1992
5,526,348 Area radio communication with radio channels divided into channel groups 31 1994
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (7)
5,175,817 Data representation protocol for communications between different networks 80 1989
5,408,465 Flexible scheme for admission control of multimedia streams on integrated networks 263 1993
5,784,597 Communications network system including acknowledgement indicating successful receipt of request for reserved communication slots and start time for said reserved communication slots 107 1995
5,787,483 High-speed data communications modem 71 1995
5,802,278 Bridge/router architecture for high performance scalable networking 193 1996
6,487,258 Methods and apparatus for decoding data 72 1998
6,577,642 Method and system for virtual network administration with a data-over cable system 135 1999
 
SILICON VALLEY BANK COMMERCIAL FINANCE DIVISION (7)
5,768,269 Apparatus and method for establishing frame synchronization in distributed digital data communication systems 43 1995
5,966,376 Apparatus and method for digital data transmission using orthogonal cyclic codes 48 1995
5,793,759 Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes 113 1996
5,745,837 Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA 220 1996
6,356,555 Apparatus and method for digital data transmission using orthogonal codes 222 1996
5,991,308 Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant 212 1996
6,307,868 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 85 1997
 
Telebit Corporation (7)
4,438,511 Packetized ensemble modem 220 1980
4,679,227 Ensemble modem structure for imperfect transmission media 298 1985
4,757,495 Speech and data multiplexor optimized for use over impaired and bandwidth restricted analog channels 275 1986
4,731,816 Ensemble modem structure for imperfect transmission media 269 1987
4,980,897 Multi-channel trellis encoder/decoder 262 1988
5,206,886 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in mulicarrier modems 212 1990
5,228,062 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in multicarrier modems 188 1992
 
TELEDIFFUSION DE FRANCE (7)
5,197,061 Device for the transmission of digital data with at least two levels of protection and corresponding reception device 167 1991
5,315,584 System of data transmission by sharing in the time-frequency space with channel organization 70 1991
5,307,376 Device for the coherent demodulation of time-frequency interlaced digital data, with estimation of the frequency response of the transmission channel and threshold, and corresponsing transmitter 92 1992
5,357,502 Device for the reception of digital data time frequency interlacing, notably for radio broadcasting at high bit rate towards mobile receivers with nyquist temporal window 85 1993
5,452,288 Method for the transmission of digital data in radio paging systems and corresponding radio paging receiver 116 1993
5,610,944 Process and device for segmentation into sub-bands and for reconstruction of a digital signal, and corresponding device 36 1993
RE36430 Device for the transmission of digital data with at least two levels of protection and corresponding reception device 70 1995
 
AMATI COMMUNICATIONS CORPORATION (6)
5,596,604 Multicarrier modulation transmission system with variable delay 167 1993
5,625,651 Discrete multi-tone data transmission system using an overhead bus for synchronizing multiple remote units 185 1994
5,627,863 Frame synchronization in multicarrier transmission systems 111 1994
5,644,573 Methods for coordinating upstream discrete multi-tone data transmissions 149 1995
5,838,799 Digital sound broadcasting using a dedicated control channel 78 1995
5,933,454 Multi-carrier data transmissions system using an overhead bus for synchronizing multiple remote units 74 1997
 
AT&T CORP. (6)
5,371,780 Communications resource assignment in a wireless telecommunications system 153 1993
6,018,528 System and method for optimizing spectral efficiency using time-frequency-code slicing 144 1994
5,592,470 Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynamic bandwidth/channel allocation 368 1994
5,765,097 Shared hybrid fiber-coax network having reduced ingress noise in the upstream channel transmitted via a repeater 71 1996
5,878,325 Hybrid fiber-coax system having at least one digital fiber node 82 1996
6,064,662 System and method for optimizing spectral efficiency using time-frequency-code slicing 92 1998
 
AT&T IPM CORP. (6)
5,513,184 Wireless communication system 55 1993
5,420,851 Method of multiple access 190 1993
5,488,412 Customer premises equipment receives high-speed downstream data over a cable television system and transmits lower speed upstream signaling on a separate channel 360 1994
5,534,913 Apparatus and method for integrating downstream data transfer over a cable television channel with upstream data carrier by other media 249 1994
5,513,248 Cordless telephone micro-cellular system 56 1994
5,528,582 Network apparatus and method for providing two way broadband communications 134 1994
 
BROADCOM CORPORATION (6)
6,243,369 Apparatus and method for synchronizing an SCDMA upstream or any other type upstream to an MCNS downstream or any other type downstream with a different clock rate than the upstream 86 1998
6,201,796 Startup protocol for high throughput communications systems 48 1998
6,212,225 Startup protocol for high throughput communications systems 34 1998
6,819,709 Startup protocol for high throughput communications system 28 2000
6,792,038 Startup protocol for high throughput communications systems 33 2001
2002/0061,012 Cable modem with voice processing capability 180 2001
 
COMCAST MO GROUP, INC. (6)
5,355,401 Method and apparatus for providing telephony power through a coaxial cable network 44 1993
5,440,335 Method and apparatus for delivering passband and telephony signals in a coaxial cable network 165 1993
5,467,384 Method and apparatus for providing power to a coaxial cable network 52 1994
5,469,495 Method and apparatus for delivering secured telephone service in hybrid coaxial cable network 129 1994
5,559,858 Method and apparatus for delivering secured telephony service in a hydrid coaxial cable network 69 1995
5,592,540 Method and apparatus for selectively delivering telephony signals on a hybrid coaxial cable network 100 1995
 
IBIQUITY DIGITAL CORPORATION (6)
5,315,583 Method and apparatus for digital audio broadcasting and reception 186 1991
5,588,022 Method and apparatus for AM compatible digital broadcasting 117 1994
5,606,576 Adaptive mode control system for AM compatible digital broadcast 66 1995
5,898,732 Data service channel provision for an AM compatible broadcast system 59 1996
5,764,706 AM compatible digital waveform frame timing recovery and frame synchronous power measurement 84 1996
5,859,876 Method and apparatus for improving AM compatible digital broadcast analog fidelity 65 1996
 
ALCATEL NETWORK SYSTEMS, INC. (5)
4,291,403 Digital implementation of parity monitor and alarm 48 1979
4,393,493 Automatic protection apparatus for span lines employed in high speed digital systems 69 1980
5,185,736 Synchronous optical transmission system 283 1989
5,181,106 Video line shelf arrangement in an optical fiber telecommunications network providing broadband switched video services 106 1991
5,528,283 Switched video distribution apparatus 51 1992
 
CABLE TELEVISION LABORATORIES, INC. (5)
5,371,548 System for transmission of digital data using orthogonal frequency division multiplexing 105 1993
5,381,459 System for distributing radio telephone signals over a cable television network 133 1993
5,815,794 Undesirable energy suppression system in the return path of a bidirectional cable network having dynamically allocated time slots 106 1995
5,815,488 Multiple user access method using OFDM 134 1995
5,867,764 Hybrid return gate system in a bidirectional cable network 83 1996
 
GO NET SYSTEMS LTD. (5)
2007/0121,546 Simultaneous simulcast and single cast hybrid multi-tone communication system 42 2006
2007/0121,573 hybrid system having multiple downlink channels and a single uplink channel 25 2006
2007/0121,743 Ubiquitous coverage OFDM hybrid system 26 2006
2007/0121,744 Hybrid point to multipoint communication system 26 2006
2007/0121,745 Filtering process for enhancing OFDMA uplink reception sensitivity 28 2006
 
INTERDIGITAL TECHNOLOGY CORPORATION (5)
5,469,468 Overlaying spread-spectrum satellite system and method 148 1993
5,546,383 Modularly clustered radiotelephone system 36 1993
5,852,604 Modularly clustered radiotelephone system 50 1996
6,208,630 Modulary clustered radiotelephone system 27 1998
6,496,488 Modularly clustered radiotelephone system 27 2000
 
KABUSHIKI KAISHA TOSHIBA (5)
4,868,811 Multiple access communication system 88 1988
5,440,268 AFC circuit for QPSK demodulator 60 1994
5,608,764 OFDM synchronization demodulation circuit 144 1994
5,646,935 Hierarchical quadrature frequency multiplex signal format and apparatus for transmission and reception thereof 76 1995
5,694,389 OFDM transmission/reception system and transmitting/receiving apparatus 199 1996
 
SILICON VALLEY BANK (5)
5,285,474 Method for equalizing a multicarrier signal in a multicarrier communication system 336 1992
5,317,596 Method and apparatus for echo cancellation with discrete multitone modulation 99 1992
5,400,322 Updating of bit allocations in a multicarrier modulation transmission system 274 1993
5,519,731 ADSL compatible discrete multi-tone apparatus for mitigation of T1 noise 172 1994
5,557,612 Method and apparatus for establishing communication in a multi-tone data transmission system 121 1995
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (5)
5,175,867 Neighbor-assisted handoff in a cellular communications system 243 1991
5,448,750 Segregation method of dynamic channel allocation in a mobile radio system 99 1992
5,507,034 Channel selection in a cellular communication system 70 1993
5,603,081 Method for communicating in a wireless communication system 204 1993
6,496,982 Device and method relating to cable TV networks 49 1998
 
ALCATEL N.V. (4)
4,748,689 Fiber-optic distribution system for broadband signals 54 1986
4,775,210 Voice and data distribution system with fiber optic multinode star network 38 1986
5,337,175 Optical communications system for the subscriber area with optical amplifiers 55 1992
5,373,502 Process, transmitter and receiver for data transmission with variable traffic volume and a control station for coordinating several such transmitters and receivers 177 1993
 
HYBRID PATENTS INCORPORATED (4)
5,347,304 Remote link adapter for use in TV broadcast data transmission system 259 1993
5,586,121 Asymmetric hybrid access system and method 385 1995
5,959,660 Subchannelization scheme for use in a broadband communications system 80 1996
5,946,322 Hybrid access system utilizing credit/done polling protocols 79 1996
 
INTELLECTUAL VENTURES I LLC (4)
5,652,772 Method and apparatus for synchronization in digital transmisison systems of the OFDM type 118 1996
5,784,363 Arrangement in a multi-user system 76 1996
5,726,973 Method and arrangement for synchronization in OFDM modulation 73 1996
5,909,436 Random access orthogonal frequency division multiplex system and method 85 1996
 
LOCKHEED MARTIN CORPORATION (4)
5,025,485 Multi-feed, multi-channel communication system 73 1989
5,128,680 Modulated range tone system 22 1990
5,680,143 Method and apparatus for a low complexity satellite ranging system using Gaussian noise overlay 23 1996
5,867,489 Method and apparatus for TDMA slot synchronization with precision ranging 34 1996
 
QUALCOMM INCORPORATED (4)
5,103,459 System and method for generating signal waveforms in a CDMA cellular telephone system 1489 1990
5,504,773 Method and apparatus for the formatting of data for transmission 244 1993
5,600,754 Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors 83 1994
5,943,361 System and method for generating signal waveforms in a CDMA cellular telephone system 158 1995
 
TECHNOLOGIES FUTURES, INC. D/B/A ORION TECHNOLOGY (4)
5,088,111 Modulation and demodulation system employing AM-PSK and FSK for communication system using digital signals 77 1989
5,084,903 Modulation and demodulation system employing AM-PSK and QPSK communication system using digital signals 110 1990
5,272,700 Spectrally efficient broadband transmission system 83 1991
5,487,066 Distributed intelligence network using time and frequency multiplexing 54 1994
 
ALCATEL USA SOURCING, L.P. (3)
5,987,014 Multipath resistant, orthogonal code-division multiple access system 65 1994
5,794,119 Subscriber frequency control system and method in point-to-multipoint RF communication system 66 1995
5,809,431 Local multipoint distribution system 83 1995
 
AT&T Bell Laboratories (3)
4,495,619 Transmitter and receivers using resource sharing and coding for increased capacity 204 1984
5,101,290 High-performance packet-switched WDM ring networks with tunable lasers 64 1990
5,278,889 Video telephony dialing 148 1992
 
CANON KABUSHIKI KAISHA (3)
5,122,700 Frictional material for vibration wave driven motor 48 1990
5,533,012 Code-division multiple-access system with improved utilization of upstream and downstream channels 69 1995
5,907,586 Method and device for signal decision, receiver and channel condition estimating method for a coding communication system 76 1996
 
ERICSSON INC. (3)
5,353,307 Automatic simulcast alignment 125 1993
6,430,417 Mobile station access to a base station on a digital multiple access control channel 61 1995
5,956,338 Protocol for broadband data communication over a shared medium 77 1996
 
FUJITSU LIMITED (3)
4,809,298 Radio data transmission system 32 1987
5,216,697 Signal quality detector circuit 41 1990
5,226,081 Multi-carrier communication system using ciphered carrier bit assignment information 50 1991
 
HARRIS CORPORATION (3)
4,367,548 Subscriber station for providing multiple services to a subscriber 173 1980
4,528,656 Radio communication system using frequency division multiplexing for transmission between a master station and a plurality of remote stations 108 1982
4,707,832 Switched point-to-point local area network control mechanism 67 1985
 
KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA (3)
4,566,100 Bit error rate measuring system 50 1983
4,783,779 Frequency assignment system in FDMA communication system 67 1986
5,613,193 Compensation of frequency offset 88 1994
 
LICENTIA PATENT-VERWALTUNGS-GMBH (3)
4,441,180 Service integrated communication transmission and interchange system 143 1980
4,395,780 Service-integrated communication transmission and exchange system 80 1981
4,545,048 Service integrated digital transmission system 56 1981
 
NOKIA MOBILE PHONES LTD. (3)
5,214,687 Method to determine transmission quality 73 1991
5,557,639 Enhanced decoder for a radio telephone 80 1994
2002/0172,293 Non-zero complex weighted space-time code for multiple antenna transmission 2 2001
 
Nynex Corporation (3)
5,072,441 Packet switched information network with universal access to enhanced network services 52 1990
5,512,937 System for integrated distribution of switched voice and television on coaxial cable and with video signal transmission originating from subscriber locations 49 1994
5,715,242 System for integrated distribution of switched voice and television on coaxial cable with phase distortion correction 29 1995
 
SAMSUNG ELECTRONICS CO., LTD. (3)
4,996,706 Method of controlling the electric power supplied to a modem 69 1989
6,005,861 Home multimedia network architecture 177 1999
2007/0053,465 Apparatus and method for performing ranging in a communication system 26 2006
 
Thomson-CSF (3)
4,561,101 Clock-frequency recovery device adapted to high-frequency radiocommunications in disturbed media 34 1983
5,313,169 Method of realigning the local oscillators of a receiver and device for implementing the method 59 1992
5,329,552 Method of binary encoding the points of a constellation used in a multicarrier modulation of OFDM type 43 1992
 
VERIZON SERVICES CORP. (3)
5,666,293 Downloading operating system software through a broadcast channel 462 1995
5,708,961 Wireless on-premises video distribution using digital multiplexing 357 1995
5,774,689 Network configuration management system for digital communication networks 148 1995
 
ADC TELECOMMUNICATIONS, INC. (2)
5,519,830 Point-to-multipoint performance monitoring and failure isolation system 57 1993
5,655,068 Point-to-multipoint performance monitoring and failure isolation system 66 1996
 
AGENCE SPATIALE EUROPEENNE (2)
5,297,136 Multicarrier demodulator 37 1992
5,327,455 Method and device for multiplexing data signals 189 1993
 
BELL ATLANTIC NETWORK SERVICES, INC. (2)
5,784,683 Shared use video processing systems for distributing program signals from multiplexed digitized information signals 124 1995
6,041,056 Full service network having distributed architecture 176 1997
 
C-Cor Labs, Inc. (2)
4,512,033 Remote level adjustment system for use in a multi-terminal communications system 112 1982
4,648,123 Remote level measurement system for use in a multi-terminal communications system 102 1985
 
Cincinnati Electronics Corporation (2)
4,267,591 QPSK Suppressed carrier with rotating reference phase 46 1979
4,879,527 Phase lock loop and improved phase detector therefor 38 1989
 
COMSAT CORPORATION (2)
4,602,375 Onboard clock correction by means of drift prediction 41 1982
4,475,211 Digitally controlled transversal equalizer 45 1982
 
ENTERASYS NETWORKS, INC. (2)
5,029,164 Congestion avoidance in high-speed network carrying bursty traffic 191 1990
5,650,997 Method and apparatus for use in a network of the ethernet type, to improve fairness by controlling collision backoff times in the event of channel capture 66 1996
 
GENERAL ELECTRIC COMPANY (2)
4,774,707 Random access communication system with scheduled data transmission and asynchronous contention scheduling 125 1986
4,701,911 Media accessing apparatus and method for communication system 34 1986
 
HITACHI, LTD. (2)
4,604,745 Method of searching fault locations in digital transmission line 45 1984
5,537,414 Method of wireless communication between base station and mobile station and multiple access communication system 164 1993
 
HMD HOLDINGS (2)
5,063,574 Multi-frequency differentially encoded digital communication for high data rate transmission through unequalized channels 104 1990
5,166,924 Echo cancellation in multi-frequency differentially encoded digital communications 141 1990
 
INFORMATION RESOURCES, INC. (2)
4,331,974 Cable television with controlled signal substitution 226 1980
4,404,589 Cable television with multi-event signal substitution 132 1980
 
International Mobile Machines Corporation (2)
4,953,197 Combination spatial diversity system 83 1988
5,022,024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels 201 1989
 
KDDI CORPORATION (2)
4,862,104 Phase synchronization system 40 1989
5,128,625 Adaptive phase lock loop system 70 1990
 
L'Etat Francais and Telediffusion de France S.A. (2)
5,274,629 Method for the broadcasting of digital data, notably for radio broadcasting at high bit rate towards mobile receivers, with time-frequency interlacing and coherent demodulation 99 1991
5,191,576 Method for broadcasting of digital data, notably for radio broadcasting at high throughput rate towards mobile receivers, with time frequency interlacing and analog synchronization 120 1991
 
MANITOBA TELEPHONE SYSTEM, THE (2)
4,430,731 Video and data distribution module with subscriber terminal 136 1981
4,484,218 Video distribution control system 167 1981
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
4,709,406 A.F.C. system for broad-band FM receiver 48 1986
5,802,241 Communication system 100 1996
 
MOTOROLA SOLUTIONS, INC. (2)
5,343,499 Quadrature amplitude modulation synchronization method 60 1992
5,365,525 Method for reducing bandwidth of a wireline communication path 34 1992
 
National Transcommunications Limited (2)
5,488,632 Transmission and reception in a hostile interference environment 88 1992
5,345,440 Reception of orthogonal frequency division multiplexed signals 118 1993
 
North American Philips Corporation (2)
5,134,464 Method and apparatus for the transmission and reception of a multicarrier digital television signal 154 1991
5,291,289 Method and apparatus for transmission and reception of a digital television signal using multicarrier modulation 171 1992
 
People's Telephone Cooperative, Inc. (2)
4,860,287 Network having a synchronizer for synchronization between a primary and a remote station 46 1987
5,185,738 Fiberoptic telephone systems 48 1990
 
ROCKSTAR BIDCO, LP (2)
5,408,260 Customer premises ADSL signal distribution arrangement 172 1994
5,499,047 Distribution network comprising coax and optical fiber paths for transmission of television and additional signals 88 1994
 
SONY CORPORATION (2)
5,471,464 Orthogonal frequency division multiplex demodulation apparatus 125 1994
5,903,546 Means and method of improving multiplexed transmission and reception by coding and modulating divided digital signals 81 1996
 
SYMBOL TECHNOLOGIES, INC. (2)
5,528,621 Packet data communication system 147 1993
2007/0141,997 Radio frequency identification (RFID) antenna integration techniques in mobile devices 41 2005
 
TVWORKS, LLC (2)
4,734,764 Cable television system selectively distributing pre-recorded video and audio messages 246 1985
5,195,092 Interactive multimedia presentation & communication system 311 1991
 
XEL Communications, Inc. (2)
5,488,413 CATV telephony system using subsplit band for both directions of transmission 84 1994
5,606,725 Broadband network having an upstream power transmission level that is dynamically adjusted as a function of the bit error rate 81 1994
 
Zenith Electronics Corporation (2)
4,528,663 Peak load access in a two-way CATV contention system 66 1983
5,546,119 Transmission modulator for cable television upstream data transmission 36 1994
 
3DLABS INC., LTD. (1)
5,042,000 Integral transform method 46 1989
 
ACTERNA LLC (1)
5,751,766 Non-invasive digital communications test system 59 1995
 
Albrit Technologies Ltd. (1)
5,495,283 Cable television video messaging system and headend facility incorporating same 80 1993
 
Allen-Bradley Company, Inc. (1)
5,289,474 Communication network interface testing system 42 1988
 
AMERICAN TELEPHONE AND TELEGRAPH COMPANY (1)
5,054,050 Drop testing in fiber to the home systems 63 1990
 
Applied Spectrum Technologies, Inc. (1)
4,677,686 Passive transmission of data over cable TV systems 59 1983
 
ARRIS ENTERPRISES, INC. (1)
6,075,972 CATV network and cable modem system having a wireless return path 58 1998
 
ARRIS INTERNATIONAL, INC. (1)
5,425,027 Wide area fiber and TV cable fast packet cell network 152 1993
 
ASCEND COMMUNICATIONS, INC. (1)
5,058,133 Method and apparatus for digital communication 51 1990
 
AT&T Information Systems Inc. (1)
4,651,320 Inband coding of secondary data 47 1984
 
ATC TECHNOLOGIES, LLC (1)
6,058,307 Priority and preemption service system for satellite related communication using central controller 83 1998
 
ATMEL CORPORATION (1)
5,553,076 Method and apparatus for a wireless local area network 76 1994
 
AVAYA INC. (1)
5,185,742 Transparent signaling for remote terminals 59 1990
 
BARD TECHNOLOGIES, U.S.A. A PARTNERSHIP OF NEW YORK (1)
4,646,296 Distributed telephone system 105 1984
 
BRN PHOENIX, INC. (1)
2003/0123,384 Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays 50 2002
 
Canai Computer and Network Architecture Inc. (1)
5,157,659 Packet communication system and method of clearing communication bus 61 1990
 
CASIO COMPUTER CO., LTD. (1)
5,083,218 Hand-held image reading apparatus 56 1990
 
Catel Telecommunications, Inc. (1)
4,959,862 Active multichannel video processing hub for optimum transition from fiber to coax 80 1988
 
CATERPILLAR INC. (1)
5,588,413 Engine assembly with leaf spring cam follower 31 1995
 
CDC PROPRIETE INTELLECTUELLE (1)
5,293,382 Method for FDMA signal multiplexing and demultiplexing 43 1993
 
CELLCO PARTNERSHIP D/B/A VERIZON WIRELESS (1)
5,243,598 Microcell system in digital cellular 168 1991
 
CIENA CORPORATION (1)
5,659,351 Switch and insertion networks in optical cable TV system 87 1994
 
CITICORP NORTH AMERICA, INC. (1)
4,516,170 Dual mode UHF tuning system 57 1984
 
CNR-STIBNOT, A CORP. OF ITALY (1)
4,503,533 Local area communication network utilizing a round robin access scheme with improved channel utilization 125 1981
 
Compagnie Generale d'Electricite (1)
4,745,592 Coherent photonic telecommunications system 37 1987
 
Comsat Laboratories (1)
5,216,696 Programmable noise bandwidth reduction by means of digital averaging 40 1991
 
COMVERGE, INC. (1)
5,896,382 Method and apparatus for communicating information between a headend and subscriber over a wide area network 89 1996
 
CONCORD COMMUNICATIONS, INC. (1)
5,115,451 Local area network modem 51 1988
 
CONOCO INC. (1)
4,613,980 System for high accuracy remote decoding 31 1984
 
CORNELL RESEARCH FOUNDATION, INC. (1)
4,791,590 High performance signal processor 83 1985
 
DAPHIMO CO. B.V., LLC (1)
2003/0026,282 Splitterless multicarrier modem 35 2002
 
Datapoint Corporation (1)
5,014,267 Video conferencing network 281 1989
 
DEVON COUNTY COUNCIL, COUNTY HALL, EXETER, DEVON, ENGLAND A CORP. OF ENGLAND (1)
4,821,120 Television sub-carrier transmission 103 1986
 
DIGITAL RADIO EXPRESS, INC. (1)
5,748,677 Reference signal communication method and system 148 1996
 
DOBSON, KURT (1)
4,943,980 Multi-carrier high speed modem 73 1989
 
DYNISCO HOTRUNNERS, INC. (1)
2007/0195,902 METHOD FOR VARIABLE FORWARD ERROR CORRECTION IN A MULTI-POINT TO POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 24 2007
 
Echelon Corporation (1)
5,355,114 Reconstruction of signals using redundant channels 168 1994
 
ELECTRONIC SPEECH SYSTEMS INC (1)
4,458,110 Storage element for speech synthesizer 30 1979
 
Endlink, Inc. (1)
5,771,449 Sectorized multi-function communication system 87 1995
 
ENERGY, UNITED STATES DEPARTMENT OF (1)
5,608,404 Imaging synthetic aperture radar 50 1993
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (1)
5,283,811 Decision feedback equalization for digital cellular radio 86 1991
 
ETAT FRANCAIS REPRESENTE PAR LE SECRETARIAT D'ETAT AUX POSTES ET TELECOMMUNICATIONS (CENTRE NATIONAL D'ETUDES DES TELECOMMUNICATIONS) (1)
4,881,241 Method and installation for digital communication, particularly between and toward moving vehicles 152 1988
 
Feature Film Services (1)
4,215,366 Subscriber-limited reception television broadcast security encoder-decoder system 135 1979
 
FRANCE TELECOM (1)
5,299,192 Digital filter-type frequency demultiplexing device 91 1992
 
FUJI XEROX CO., LTD. (1)
4,710,918 Composite data transmission system 59 1986
 
FUNAI ELECTRIC CO., LTD. (1)
5,483,529 Receiver 119 1994
 
GENERAL DYNAMICS C4 SYSTEMS, INC. (1)
5,128,967 Symbol state trellis maximum likelihood detection method 67 1989
 
GENERAL DYNAMICS DECISION SYSTEMS, INC. (1)
4,612,626 Method of performing real input fast fourier transforms simultaneously on two data streams 43 1983
 
GENERAL INSTRUMENT EQUITY CORPORATION (1)
5,136,411 Dynamically responsive CATV system with shared fiber optic link 128 1989
 
GPT LIMITED (1)
6,097,736 Telecommunications network 42 1995
 
Grayline International Limited (1)
5,454,037 Portable secure-telephone communications module 46 1993
 
HANSEN, TOM (1)
2005/0122,218 Ranging and warning device using emitted and reflected wave energy 26 2003
 
HARRIS, JR., ROBERT CLAUDE, TRUSTEE OF THE ROBERT CLAUDE HARRIS, JR., REVOCABLE LIVING TRUST (1)
5,121,409 Multichannel satellite communication and control system 47 1990
 
HEINRICH-HERTZ-INSTITUT FUR NACHRICHTENTECHNIK BERLIN GMBH (1)
4,290,142 Interactive cable television system 157 1979
 
HITACHI AMERICA, LTD. (1)
5,282,023 Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters 156 1992
 
HONEYWELL INTERNATIONAL INC. (1)
7,372,859 Self-checking pair on a braided ring network 34 2004
 
INTEL CORPORATION (1)
5,553,064 High speed bidirectional digital cable transmission system 85 1994
 
INTELLECTUAL VENTURES HOLDING 66 LLC (1)
5,963,557 High capacity reservation multiple access network with multiple shared unidirectional paths 201 1997
 
INTELLECTUAL VENTURES MOBLCOMMI LLC (1)
5,680,388 Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division of multiplexing 75 1995
 
INTELSAT SERVICES CORPORATION (1)
4,858,225 Variable bandwidth variable center-frequency multibeam satellite-switched router 75 1987
 
INTELSTAT (1)
5,515,056 Burst tone range processing system and method 28 1993
 
INTRATECH, INC. (1)
5,995,539 Method and apparatus for signal transmission and reception 95 1996
 
Inventahl AB (1)
5,559,795 Method in a TDMA radiosystem to let a central station communicate with both peripheral stations and other central stations 40 1994
 
IPCOM GMBH & CO. KG (1)
5,390,216 Synchronization method for a mobile radiotelephone 111 1993
 
ITRON, INC. (1)
5,673,252 Communications protocol for remote data generating stations 182 1995
 
JVC KENWOOD CORPORATION (1)
5,732,068 Signal transmitting apparatus and signal receiving apparatus using orthogonal frequency division multiplexing 125 1995
 
LCTL WIRELESS INVESTMENT, LLC (1)
5,375,140 Wireless direct sequence spread spectrum digital cellular telephone system 165 1992
 
LEGERITY, INC. (1)
6,125,139 Narrowband digital cordless telephone 34 1996
 
LG ELECTRONICS INC. (1)
5,535,206 Upstream data transmission system for cable television 52 1995
 
M/A-COM TELECOMMUNICATIONS, INC., (1)
4,768,188 Optical demand assigned local loop communication system 109 1986
 
MACROVISION CORPORATION (1)
4,506,387 Programming-on-demand cable system and method 352 1983
 
MARCONI COMMUNICATIONS GMBH (1)
4,847,872 Method and arrangement for synchronizing a receiver in digital transmission systems 40 1988
 
Mark J. Dapper (1)
2001/0032,334 INGRESS PROTECTION IN A COMMUNICATION SYSTEM WITH ORTHOGONAL CARRIERS 33 1999
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
5,425,050 Television transmission system using spread spectrum and orthogonal frequency-division multiplex 112 1993
 
MATRA MARCONI SPACE UK LIMITED (1)
5,293,329 Apparatus for and method of digital signal processing 44 1992
 
MATSUSHITA ELECTRIC CORPORATION OF AMERICA (1)
5,485,630 Audio/video distribution system 60 1994
 
MICROCOM, INC. (1)
4,691,314 Method and apparatus for transmitting data in adjustable-sized packets 84 1985
 
MICRON TECHNOLOGY, INC. (1)
5,963,833 Method for cleaning semiconductor wafers and 52 1997
 
MICROSOFT CORPORATION (1)
5,479,168 Compatible signal encode/decode system 162 1993
 
MITEL CORPORATION (1)
4,866,732 Wireless telephone system 230 1986
 
Mitel Telecom Limited (1)
5,005,183 Wireless telephone system 135 1989
 
MITRE CORPORATION, THE (1)
4,773,066 Synchronized multiple access apparatus and method for a local area network 66 1986
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
4,807,259 Time synchronization method in data transmission system 99 1987
 
MMS SPACE SYSTEMS LIMITED (1)
5,345,439 Multi purpose digital signal regenerative processing apparatus 161 1993
 
MOORE DIVERSIFIED PRODUCTS, INC. (1)
4,343,042 Bi-directional data transmission and control system 165 1979
 
MOTOROLA MOBILITY, INC. (1)
5,327,575 Directional handover control in digital mobile radio systems employing MAHO 122 1992
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
5,170,470 Integrated modem which employs a host processor as its controller 80 1988
 
NAXOS DATA LLC (1)
5,303,229 Optical network unit 127 1991
 
NCR CORPORATION (1)
4,847,880 Multipoint modem system having fast synchronization 79 1988
 
New Potency Products, Inc. (1)
5,167,632 Syringe 50 1992
 
NEW VIACOM INTERNATIONAL CORP. (1)
6,011,950 Apparatus and method for using forward error correction setting to enable simultaneous use of multiple modulation systems on terrestrial distribution networks 38 1999
 
NEXTIRAONE, LLC (1)
5,177,739 Multiport - multipoint digital data service 62 1990
 
Nippon Electric Co., Ltd. (1)
4,300,229 Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor 58 1980
 
NIPPON HOSO KYOKAI (1)
5,406,551 Method and apparatus for digital signal transmission using orthogonal frequency division multiplexing 128 1993
 
NOKIA TELECOMMUNICATIONS OY (1)
5,703,873 Method and apparatus for synchronizing subscriber equipment with base stations in a CDMA radio network 95 1995
 
NORTEL NETWORKS LIMITED (1)
4,500,989 Digital communication system 57 1982
 
NORTH AMERICAN IP HOLDINGS, LLC (1)
5,590,403 Method and system for efficiently providing two way communication between a central network and mobile unit 77 1992
 
NORTHROP GRUMMAN CORPORATION (1)
4,604,721 Computer and method for high speed prime factor transform 42 1985
 
NTT MOBILE COMMUNICATIONS NETWORK INC. (1)
5,537,443 Interference signal cancelling method, receiver and communication system using the same 101 1994
 
NXP B.V. (1)
5,541,965 Carrier frequency synchronization device using two different B/W filters 48 1994
 
PAC-TEL CORPORATION (1)
5,193,109 Zoned microcell with sector scanning for cellular telephone system 154 1991
 
PANASONIC CORPORATION (1)
5,600,672 Communication system 117 1994
 
PARADYNE CORPORATION (1)
4,381,546 System for the quantitative measurement of impairments in the communication channel of a quadrature amplitude modulation data communication system 58 1979
 
PERICLE WIRELESS TECHNOLOGY, INC. (1)
5,541,955 Adaptive data rate modem 294 1995
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION (1)
5,802,117 Method and apparatus for joint frequency offset and timing estimation of a multicarrier modulation system 89 1996
 
Pioneer Electronic Corporation (1)
4,558,358 Cable network monitoring system for CATV system 59 1982
 
PLESSEY COMPANY LIMITED, THE (1)
4,387,456 Alarm monitoring arrangements for digital telecommunications switching networks 35 1980
 
PLESSEY SEMICONDUCTORS LIMITED (1)
5,193,103 Digital phase locked loop circuit 37 1991
 
POLAROID CORPORATION (1)
4,587,066 Method and apparatus for forming magnetic recording media 34 1984
 
POWERWAVE TECHNOLOGIES, INC. (1)
5,969,584 Resonating structure providing notch and bandpass filtering 34 1997
 
RACAL-DATACOM, INC. (1)
4,998,244 High speed module interconnection bus 37 1989
 
Radix Wireless, Inc. (1)
6,128,276 Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays 240 1997
 
RCA Corporation (1)
4,519,074 Transceiver having collision detection capability for contention-formatted FDM local area networks 69 1983
 
ROBERT BOSCH GMBH (1)
5,111,460 Process for the localization of defective stations in local networks and associated interface controller 56 1991
 
Robertshaw Controls Company (1)
5,002,038 Burner construction and method of making the same 47 1989
 
ROCKSTAR CONSORTIUM US LP (1)
5,471,474 Communications highway network system 86 1993
 
ROCKWELL INTERNATIONAL CORPORATION (1)
4,275,452 Simplified fast fourier transform butterfly arithmetic unit 43 1979
 
Rogers Cable Systems Limited (1)
5,802,173 Radiotelephony system 153 1992
 
ROHDE & SCHWARZ GMBH & CO. KG (1)
5,521,943 COFDM combined encoder modulation for digital broadcasting sound and video with PSK, PSK/AM, and QAM techniques 91 1993
 
ROKE MANOR RESEARCH LIMITED (1)
5,483,550 Mobile cellular radio systems 75 1994
 
SAMOYLENKO, IRAIDA IVANOVNA (1)
5,576,702 Method and apparatus for fault-tolerant transmission in multi-channel networks 38 1995
 
SEIKO EPSON CORPORATION (1)
2007/0098,047 WIRELESS COMMUNICATION APPARATUS 24 2006
 
SHARED TECHNOLOGIES FAIRCHILD TELECOM, INC. (1)
4,644,535 PCM channel multiplexer/demultiplexer 53 1984
 
SHARP KABUSHIKI KAISHA (1)
5,313,413 Apparatus and method for preventing I/O bandwidth limitations in fast fourier transform processors 52 1993
 
SHERWOOD PARTNERS, INC. (1)
6,512,737 Stacked carrier discrete multiple tone communication system 70 2000
 
SIECOR PUERTO RICO, INC. (1)
4,800,588 Telephone network interface system 86 1985
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,095,482 Method of and apparatus of individually monitoring transmission sections of a communications transmission link 38 1989
 
SPARKMOTION INC. (1)
2007/0076,589 Method and device for handling ranging signals in a wireless communications network 29 2006
 
STANDARD ELEKTRIK LORENZ AG (1)
4,686,667 Broadband integrated subscriber loop system 75 1985
 
STC LIMITED (1)
5,208,812 Telecommunications system 75 1990
 
TAGGERT HOLDINGS LLC (1)
5,235,615 Spread spectrum method 151 1992
 
TDF (1)
5,228,025 Method for the broadcasting of digital data, notably for radio broadcasting at a high bit-rate towards mobile receivers, with time-frequency interlacing and assistance in the acquisition of automatic frequency control, and corresponding receiver 146 1991
 
TEKNEKRON COMMUNICATIONS SYSTEMS, INC. (1)
5,255,290 Method and apparatus for combined frequency offset and timing offset estimation 74 1992
 
TELCORDIA TECHNOLOGIES, INC. (1)
4,705,350 Optical transmission network 59 1985
 
TELECABLE VIDEOTRON LTD. (1)
4,623,920 Cable network data transmission system 168 1983
 
TELISAR CORPORATION (1)
7,071,994 System and method for nondisruptively embedding an OFDM modulated data signal into a composite video signal 47 2001
 
Terayon Communications System, Inc., a Delaware Corporation (1)
6,937,617 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 42 2001
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (1)
5,479,447 Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines 652 1993
 
THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS (1)
4,206,320 High speed modem suitable for operating with a switched network 105 1978
 
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA (1)
5,455,547 Microelectromechanical signal processors 76 1994
 
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (1)
4,907,233 VLSI single-chip (255,223) Reed-Solomon encoder with interleaver 80 1988
 
The United States of America as represented by the Secretary of the Army (1)
4,494,228 Orthogonal code division multiple access communications systems 85 1982
 
The United States of America as represented by the Secretary of the Navy (1)
5,408,681 Automatic repeater station for signal transmissions 36 1993
 
THE UNIVERSITY OF BRITISH COLUMBIA (1)
5,444,697 Method and apparatus for frame synchronization in mobile OFDM data communication 157 1993
 
THOMSON CONSUMER ELECTRONICS SALES GMBH (1)
5,584,051 Radio broadcast transmission system and receiver for incompatible signal formats, and method therefor 91 1994
 
Times Fiber Communications, Inc. (1)
4,491,983 Information distribution system 165 1982
 
TITAN CORPORATION, THE (1)
4,912,705 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels 192 1989
 
Tokyo Shibaura Denki Kabushiki Kaisha (1)
4,617,656 Information transmission system with modems coupled to a common communication medium 123 1986
 
Toyotomi Kogyo Co., Ltd. (1)
5,030,085 Wick operating structure of lever actuation type for oil burner 25 1989
 
TQ DELTA, LLC (1)
5,636,246 Multicarrier transmission system 118 1994
 
TRW INC. (1)
5,357,249 Apparatus and method for high speed flexible multiplexing for fiber optic data transmissions 50 1991
 
TTI INVENTIONS A LLC (1)
4,891,694 Fiber optic cable television distribution system 138 1988
 
TYCO INTERNATIONAL LTD., A CORPORATION OF BERMUDA (1)
5,111,497 Alarm and test system for a digital added main line 138 1990
 
UNICORN VENTURES LTD., A LIMITED PARTNERSHIP OF NJ (1)
4,185,168 Method and means for adaptively filtering near-stationary noise from an information bearing signal 101 1978
 
UNISYS CORPORATION (1)
5,499,236 Synchronous multipoint-to-point CDMA communication system 102 1994
 
UNWIRED PLANET, LLC (1)
5,673,291 Simultaneous demodulation and decoding of a digitally modulated radio signal using known symbols 119 1994
 
US SPRINT COMMUNICATIONS COMPANY, A NEW YORK GENERAL PARTNERSHIP (1)
4,710,924 Local and remote bit error rate monitoring for early warning of fault location of digital transmission system 51 1985
 
USA DIGITAL RADIO PARTNERS, L.P. (1)
5,673,292 AM-PSK system for broadcasting a composite analog and digital signal using adaptive M-ary PSK modulation 79 1996
 
USA DIGITAL RADIO, INC. (1)
5,005,169 Frequency division multiplex guardband communication system for sending information over the guardbands 208 1989
 
VIASAT, INC. (1)
5,349,580 Method and apparatus for channel allocation integrity in a communication network 97 1993
 
WAVEPHORE CORPORATION (1)
5,387,941 Data with video transmitter 186 1992
 
WAVO CORPORATION (1)
5,617,148 Filter by-pass for transmitting an additional signal with a video signal 117 1995
 
WEST END SYSTEMS CORP. (1)
6,091,932 Bidirectional point to multipoint network using multicarrier modulation 156 1998
 
WESTERN ATLAS INTERNATIONAL, INC. (1)
4,860,018 Continuous wave interference rejection for reconstructed carrier receivers 43 1986
 
WI-LAN INC. (1)
5,282,222 Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum 411 1992
 
Windata, Inc. (1)
5,276,703 Wireless local area network communications system 241 1992
 
WORLD GATE COMMUNICATIONS, LLC (1)
5,999,970 Access system and method for providing interactive access to an information source through a television distribution system 111 1996
 
XEROX CORPORATION (1)
5,145,525 Oil handling around a metering roll 30 1990
 
XIAM TREA PTE, L.L.C. (1)
5,768,309 Unified trellis encoder 56 1994
 
XILINX, INC. (1)
6,021,423 Method for parallel-efficient configuring an FPGA for large FFTS and other vector rotation computations 68 1997
 
Zellweger Tellecommunications Ltd. (1)
4,853,686 Method and apparatus for establishing a connection in shortwave radio networks 58 1987
 
Other [Check patent profile for assignment information] (7)
4,644,526 Full duplex frequency division multiplex communication system 165 1984
5,124,980 Synchronous multiport digital 2-way communications network using T1 PCM on a CATV cable 104 1989
5,027,426 Signal coupling device and system 141 1989
5,343,209 Navigation receiver with coupled signal-tracking channels 186 1992
5,207,466 Prong-equipped garden tool 45 1992
5,371,696 Computational structures for the fast Fourier transform analyzers 47 1992
5,528,585 Modularly clustered radiotelephone system 73 1995

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
The United States of America as represented by the Secretary of the Navy (1)
8,150,325 Blanking system 1 2008

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Dec 7, 2014
7.5 Year Payment $3600.00 $1800.00 $900.00 Dec 7, 2018
11.5 Year Payment $7400.00 $3700.00 $1850.00 Dec 7, 2022
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00