Systems and method for orthogonal frequency divisional multiplexing

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7957265
APP PUB NO 20080049604A1
SERIAL NO

11927460

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

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

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
HTC CORPORATIONTAOYUAN COUNTY1725

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brede, Jeffrey Eden Prairie, US 89 3302
Geile, Michael J Loveland, US 146 5434

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (7)
4644526 Full duplex frequency division multiplex communication system 196 1984
* 5124980 Synchronous multiport digital 2-way communications network using T1 PCM on a CATV cable 115 1989
5027426 Signal coupling device and system 214 1989
5343209 Navigation receiver with coupled signal-tracking channels 210 1992
5207466 Prong-equipped garden tool 49 1992
5371696 Computational structures for the fast Fourier transform analyzers 51 1992
5528585 Modularly clustered radiotelephone system 77 1995
 
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 79 2002
 
ROKE MANOR RESEARCH LIMITED (1)
5483550 Mobile cellular radio systems 79 1994
 
KDDI CORPORATION (2)
4862104 Phase synchronization system 44 1989
5128625 Adaptive phase lock loop system 79 1990
 
XILINX, INC. (1)
6021423 Method for parallel-efficient configuring an FPGA for large FFTS and other vector rotation computations 116 1997
 
ITRON, INC. (1)
5673252 Communications protocol for remote data generating stations 293 1995
 
WESTERN ATLAS INTERNATIONAL, INC. (1)
4860018 Continuous wave interference rejection for reconstructed carrier receivers 47 1986
 
Datapoint Corporation (1)
5014267 Video conferencing network 322 1989
 
AVAYA INC. (1)
5185742 Transparent signaling for remote terminals 63 1990
 
WAVO CORPORATION (1)
5617148 Filter by-pass for transmitting an additional signal with a video signal 122 1995
 
LOCKHEED MARTIN CORPORATION (4)
5025485 Multi-feed, multi-channel communication system 83 1989
5128680 Modulated range tone system 26 1990
5680143 Method and apparatus for a low complexity satellite ranging system using Gaussian noise overlay 27 1996
5867489 Method and apparatus for TDMA slot synchronization with precision ranging 39 1996
 
NORTHROP GRUMMAN CORPORATION (1)
4604721 Computer and method for high speed prime factor transform 48 1985
 
ATC TECHNOLOGIES, LLC (1)
6058307 Priority and preemption service system for satellite related communication using central controller 115 1998
 
ALCATEL USA SOURCING, L.P. (3)
5987014 Multipath resistant, orthogonal code-division multiple access system 95 1994
5794119 Subscriber frequency control system and method in point-to-multipoint RF communication system 92 1995
5809431 Local multipoint distribution system 155 1995
 
Compagnie Generale d'Electricite (1)
* 4745592 Coherent photonic telecommunications system 43 1987
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (5)
5175817 Data representation protocol for communications between different networks 87 1989
5408465 Flexible scheme for admission control of multimedia streams on integrated networks 356 1993
5784597 Communications network system including acknowledgement indicating successful receipt of request for reserved communication slots and start time for said reserved communication slots 115 1995
5787483 High-speed data communications modem 94 1995
6487258 Methods and apparatus for decoding data 79 1998
 
U.S. PHILIPS CORPORATION (15)
4395768 Error correction device for data transfer system 47 1981
4472802 System of transmitting information between a central station and sub-stations 112 1982
4618955 Digital data transmission system 49 1984
4985902 Decision feedback equalizer and a method of operating a decision feedback equalizer 102 1989
5073899 Transmission system for sending two signals simultaneously on the same communications channel 224 1989
5371761 Transmission system and receiver for this system 104 1993
5416801 Digital signal transmission system based on partitioning of a coded modulation with concatenated codings 140 1993
5550812 System for broadcasting and receiving digital data, receiver and transmitter for use in such system 98 1993
5446918 Cable network and modulator-demondulator arrangement for such a network 46 1993
5559833 Transmission system comprising timing recovery 80 1994
5416767 Method of transmitting a data stream, transmitter and receiver 78 1994
5579321 Telecommunication system and a main station and a substation for use in such a system 53 1994
5619504 Telecommunication system and a main station for use in such a system 81 1994
5509003 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 71 1994
5581554 Multiple access telecommunication network 31 1994
 
Inventahl AB (1)
5559795 Method in a TDMA radiosystem to let a central station communicate with both peripheral stations and other central stations 45 1994
 
ETAT FRANCAIS, MINISTERE DES PTT (CENTRE NATIONAL D'ETUDES DES TELECOMMUNICATIONS) (3)
5228025 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 181 1991
5274629 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 128 1991
5197061 Device for the transmission of digital data with at least two levels of protection and corresponding reception device 190 1991
 
SYMBOL TECHNOLOGIES, INC. (2)
5528621 Packet data communication system 181 1993
2007/0141,997 Radio frequency identification (RFID) antenna integration techniques in mobile devices 65 2005
 
FUJI XEROX CO., LTD. (1)
4710918 Composite data transmission system 63 1986
 
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY (15)
* 4709418 Wideband cable network 250 1983
4642806 Communications network having a single node and a plurality of outstations 116 1984
4651330 Multipoint data communications 50 1984
4881243 Signal timing circuits 47 1985
4975899 Optical broadcast network 61 1988
5010586 Optical two-way transmission system with loop reflector modulator 42 1988
5153764 Control of optical systems 39 1989
5138635 Network clock synchronization 42 1990
4977593 Optical communications network 196 1990
* 5063595 Optical communications network 57 1990
* 5086470 Scrambling in digital communications network using a scrambled synchronization signal 53 1990
5173899 TDMA communications network of transmitting information between a central station and remote stations 90 1990
5142532 Communication system 124 1990
5245459 Optical communications systems 44 1991
5341365 Passive optical network 50 1992
 
RACAL-DATACOM, INC. (1)
4998244 High speed module interconnection bus 41 1989
 
People's Telephone Cooperative, Inc. (2)
4860287 Network having a synchronizer for synchronization between a primary and a remote station 50 1987
5185738 Fiberoptic telephone systems 52 1990
 
TQ DELTA, LLC (1)
5636246 Multicarrier transmission system 133 1994
 
TEXAS INSTRUMENTS INCORPORATED (9)
6055268 Multimode digital modem 226 1996
6002722 Multimode digital modem 213 1996
5910970 MDSL host interface requirement specification 197 1996
5987061 Modem initialization process for line code and rate selection in DSL data communication 186 1996
6021158 Hybrid wireless wire-line network integration and management 196 1996
6038251 Direct equalization method 93 1996
6044107 Method for interoperability of a T1E1.4 compliant ADSL modem and a simpler modem 226 1996
7068678 Method and apparatus for coordinating multi-point to point communications in a multi-tone data transmission system 63 2002
7079549 Method and apparatus for coordinating multi-point to point communications in a multi-tone data transmission system 38 2002
 
The United States of America as represented by the Secretary of the Navy (1)
5408681 Automatic repeater station for signal transmissions 40 1993
 
PERICLE WIRELESS TECHNOLOGY, INC. (1)
5541955 Adaptive data rate modem 327 1995
 
3DLABS INC., LTD. (1)
5042000 Integral transform method 52 1989
 
MOTOROLA MOBILITY LLC (1)
5323391 Multi-channel digital transmitter and receiver 106 1993
 
SEIKO EPSON CORPORATION (1)
2007/0098,047 WIRELESS COMMUNICATION APPARATUS 30 2006
 
GENERAL INSTRUMENT EQUITY CORPORATION (1)
5136411 Dynamically responsive CATV system with shared fiber optic link 144 1989
 
MICRON TECHNOLOGY, INC. (1)
5963833 Method for cleaning semiconductor wafers and 64 1997
 
XEROX CORPORATION (1)
5145525 Oil handling around a metering roll 30 1990
 
GENERAL INSTRUMENT CORPORATION (2)
4574305 Remote hub television and security systems 171 1983
* 5125100 Optimal signal synthesis for distortion cancelling multicarrier systems 78 1990
 
SILICON VALLEY BANK COMMERCIAL FINANCE DIVISION (6)
5768269 Apparatus and method for establishing frame synchronization in distributed digital data communication systems 48 1995
5793759 Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes 166 1996
5745837 Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA 284 1996
6356555 Apparatus and method for digital data transmission using orthogonal codes 306 1996
5991308 Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant 364 1996
6307868 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 100 1997
 
SILICON VALLEY BANK (5)
5285474 Method for equalizing a multicarrier signal in a multicarrier communication system 374 1992
5317596 Method and apparatus for echo cancellation with discrete multitone modulation 113 1992
5400322 Updating of bit allocations in a multicarrier modulation transmission system 298 1993
5519731 ADSL compatible discrete multi-tone apparatus for mitigation of T1 noise 215 1994
5557612 Method and apparatus for establishing communication in a multi-tone data transmission system 159 1995
 
JDS UNIPHASE CORPORATION (1)
5751766 Non-invasive digital communications test system 67 1995
 
USA DIGITAL RADIO, INC. (1)
5005169 Frequency division multiplex guardband communication system for sending information over the guardbands 215 1989
 
USA DIGITAL RADIO PARTNERS, L.P. (1)
5673292 AM-PSK system for broadcasting a composite analog and digital signal using adaptive M-ary PSK modulation 84 1996
 
TRW INC. (1)
5357249 Apparatus and method for high speed flexible multiplexing for fiber optic data transmissions 57 1991
 
Rogers Cable Systems Limited (1)
5802173 Radiotelephony system 283 1992
 
TELEBIT CORPORATION (7)
4438511 Packetized ensemble modem 241 1980
* 4679227 Ensemble modem structure for imperfect transmission media 344 1985
* 4757495 Speech and data multiplexor optimized for use over impaired and bandwidth restricted analog channels 307 1986
4731816 Ensemble modem structure for imperfect transmission media 289 1987
4980897 Multi-channel trellis encoder/decoder 275 1988
5206886 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in mulicarrier modems 233 1990
5228062 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in multicarrier modems 195 1992
 
INTELLECTUAL VENTURES MOBLCOMMI LLC (1)
5680388 Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division of multiplexing 86 1995
 
GOOGLE INC. (11)
5446727 Method and apparatus for time aligning signals for reception in a code-division multiple access communication system 140 1993
5430799 Multichannel television signal scrambling and descrambling system and method 40 1994
6157669 Method and apparatus for preempting burst frequency assignments in a frequency-hopping communication system 70 1994
5754650 Simultaneous multichannel television access control system and method 84 1995
5790607 Apparatus and method for recovery of symbol timing for asynchronous data transmission 48 1995
5699365 Apparatus and method for adaptive forward error correction in data communications 203 1996
6219840 Method for assigning communication resources in a communication system 63 1996
5828660 Multiple user communication system, device and method with overlapping uplink carrier spectra 67 1996
5864621 Broadband television scrambling and descrambling system 36 1996
6426983 Method and apparatus of using a bank of filters for excision of narrow band interference signal from CDMA signal 150 1998
2001/0001,616 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 87 2000
 
LG ELECTRONICS INC. (1)
5535206 Upstream data transmission system for cable television 66 1995
 
SHARP KABUSHIKI KAISHA (1)
5313413 Apparatus and method for preventing I/O bandwidth limitations in fast fourier transform processors 56 1993
 
The Plessey Company PLC (1)
4387456 Alarm monitoring arrangements for digital telecommunications switching networks 39 1980
 
WEST END SYSTEMS CORP. (1)
6091932 Bidirectional point to multipoint network using multicarrier modulation 221 1998
 
CIENA CORPORATION (1)
5659351 Switch and insertion networks in optical cable TV system 98 1994
 
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) (5)
5175867 Neighbor-assisted handoff in a cellular communications system 286 1991
5448750 Segregation method of dynamic channel allocation in a mobile radio system 132 1992
5507034 Channel selection in a cellular communication system 94 1993
5603081 Method for communicating in a wireless communication system 229 1993
6496982 Device and method relating to cable TV networks 53 1998
 
PLESSEY SEMICONDUCTORS LIMITED (1)
5193103 Digital phase locked loop circuit 41 1991
 
TAGGERT HOLDINGS LLC (1)
5235615 Spread spectrum method 159 1992
 
Sharp Corporation (2)
5504775 Multi-user spread spectrum communication system 164 1994
* 5548582 Multicarrier frequency hopping communications system 208 1994
 
COMCAST MO GROUP, INC. (6)
5355401 Method and apparatus for providing telephony power through a coaxial cable network 48 1993
5440335 Method and apparatus for delivering passband and telephony signals in a coaxial cable network 216 1993
5467384 Method and apparatus for providing power to a coaxial cable network 75 1994
5469495 Method and apparatus for delivering secured telephone service in hybrid coaxial cable network 145 1994
5559858 Method and apparatus for delivering secured telephony service in a hydrid coaxial cable network 74 1995
5592540 Method and apparatus for selectively delivering telephony signals on a hybrid coaxial cable network 121 1995
 
ARRIS ENTERPRISES LLC (1)
6075972 CATV network and cable modem system having a wireless return path 72 1998
 
RPX CLEARINGHOUSE LLC (3)
5471474 Communications highway network system 92 1993
5408260 Customer premises ADSL signal distribution arrangement 201 1994
5499047 Distribution network comprising coax and optical fiber paths for transmission of television and additional signals 98 1994
 
U.S. Sprint Communications Company Limited (1)
* 4710924 Local and remote bit error rate monitoring for early warning of fault location of digital transmission system 55 1985
 
TELCORDIA TECHNOLOGIES, INC. (1)
* 4705350 Optical transmission network 63 1985
 
C-Cor Labs, Inc. (2)
4512033 Remote level adjustment system for use in a multi-terminal communications system 145 1982
4648123 Remote level measurement system for use in a multi-terminal communications system 129 1985
 
IBIQUITY DIGITAL CORPORATION (6)
5315583 Method and apparatus for digital audio broadcasting and reception 204 1991
5588022 Method and apparatus for AM compatible digital broadcasting 136 1994
5606576 Adaptive mode control system for AM compatible digital broadcast 80 1995
5898732 Data service channel provision for an AM compatible broadcast system 68 1996
5764706 AM compatible digital waveform frame timing recovery and frame synchronous power measurement 101 1996
5859876 Method and apparatus for improving AM compatible digital broadcast analog fidelity 70 1996
 
VIASAT, INC. (1)
5349580 Method and apparatus for channel allocation integrity in a communication network 120 1993
 
OPTIS WIRELESS TECHNOLOGY, LLC (1)
6430417 Mobile station access to a base station on a digital multiple access control channel 69 1995
 
The MITRE Corporation (1)
4773066 Synchronized multiple access apparatus and method for a local area network 70 1986
 
COMMSCOPE TECHNOLOGIES LLC (1)
5655068 Point-to-multipoint performance monitoring and failure isolation system 72 1996
 
FUNAI ELECTRIC CO., LTD. (1)
5483529 Receiver 144 1994
 
Telisar Corporation (1)
7071994 System and method for nondisruptively embedding an OFDM modulated data signal into a composite video signal 54 2001
 
STC LIMITED (1)
5208812 Telecommunications system 118 1990
 
XEL Communications, Inc. (2)
5488413 CATV telephony system using subsplit band for both directions of transmission 95 1994
5606725 Broadband network having an upstream power transmission level that is dynamically adjusted as a function of the bit error rate 151 1994
 
InterDigital Technology Corporation (5)
5469468 Overlaying spread-spectrum satellite system and method 158 1993
5546383 Modularly clustered radiotelephone system 41 1993
5852604 Modularly clustered radiotelephone system 59 1996
6208630 Modulary clustered radiotelephone system 31 1998
6496488 Modularly clustered radiotelephone system 31 2000
 
Albrit Technologies Ltd. (1)
5495283 Cable television video messaging system and headend facility incorporating same 106 1993
 
CITICORP NORTH AMERICA, INC. (1)
4516170 Dual mode UHF tuning system 61 1984
 
CELLCO PARTNERSHIP D/B/A VERIZON WIRELESS (1)
5243598 Microcell system in digital cellular 216 1991
 
National Transcommunications Limited (2)
5488632 Transmission and reception in a hostile interference environment 108 1992
5345440 Reception of orthogonal frequency division multiplexed signals 126 1993
 
Endlink, Inc. (1)
5771449 Sectorized multi-function communication system 99 1995
 
MMS SPACE SYSTEMS LIMITED (1)
5345439 Multi purpose digital signal regenerative processing apparatus 207 1993
 
CANON KABUSHIKI KAISHA (3)
5122700 Frictional material for vibration wave driven motor 48 1990
5533012 Code-division multiple-access system with improved utilization of upstream and downstream channels 76 1995
5907586 Method and device for signal decision, receiver and channel condition estimating method for a coding communication system 86 1996
 
LUCENT TECHNOLOGIES INC. (6)
* 4688210 Method of and arrangement for synchronizing the receiver arrangements in a digital multiplex transmission system 172 1986
4799252 Digital radio transmission system 119 1988
RE33900 Error monitoring in digital transmission systems 126 1989
5570364 Control for multimedia communication on local access table 36 1994
5621753 Digital communication system and a primary station for use in such a system 64 1994
5602836 Multiple access cellular communication with circular interleaving and reduced dropped-packet runlengths 154 1994
 
EXTREME NETWORKS, INC. (1)
5650997 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 70 1996
 
INTRATECH, INC. (1)
5995539 Method and apparatus for signal transmission and reception 124 1996
 
CISCO TECHNOLOGY, INC. (11)
4912721 Cable television spread spectrum data transmission apparatus 127 1988
5153763 CATV distribution networks using light wave transmission lines 102 1989
5191459 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 150 1989
5235619 Cable television radio frequency subscriber data transmission apparatus and RF return method 255 1990
5255086 Method and apparatus for RF data transfer in a CATV system 172 1990
5225902 Automatic frequency selection in a bi-directional cable television system 230 1991
5262883 CATV distribution networks using light wave transmission lines 65 1992
5499241 Broadband communications system 169 1993
5594726 Frequency agile broadband communications system 251 1994
5581555 Reverse path allocation and contention resolution scheme for a broadband communications system 157 1995
5719872 Reverse path allocation and contention resolution scheme for a broadband communications system 139 1996
 
CORNELL RESEARCH FOUNDATION, INC. (1)
4791590 High performance signal processor 132 1985
 
DYNISCO HOTRUNNERS, INC. (1)
2007/0195,902 METHOD FOR VARIABLE FORWARD ERROR CORRECTION IN A MULTI-POINT TO POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 32 2007
 
MOTOROLA, INC. (12)
5038342 TDM/FDM communication system supporting both TDM and FDM-only communication units 74 1989
4977612 Channel selection in a multi-frequency radio data communication system 190 1989
* 5091906 Quasi-duplex radio system using bi-directional hole extension 78 1989
5249305 Radio frequency error detection and correction system 41 1991
5297186 Device and method for on-line adaptive selection of baud rate and carrier frequency 92 1991
5280630 Method and apparatus for dynamic channel allocation 171 1992
5204874 Method and apparatus for using orthogonal coding in a communication system 132 1992
5351245 Bit error rate detection method 44 1993
5533008 Method and apparatus for providing a communication system infrastructure 110 1995
5499273 Method and apparatus for symbol clock recovery from signal having wide frequency possibilities 38 1995
5793772 Method and apparatus for synchronizing timing of components of a telecommunication system 104 1995
6141546 Mobile telephone systems 40 1997
 
CABLE TELEVISION LABORATORIES, INC. (4)
5371548 System for transmission of digital data using orthogonal frequency division multiplexing 118 1993
5381459 System for distributing radio telephone signals over a cable television network 213 1993
5815794 Undesirable energy suppression system in the return path of a bidirectional cable network having dynamically allocated time slots 136 1995
5867764 Hybrid return gate system in a bidirectional cable network 103 1996
 
INTEL CORPORATION (2)
5553064 High speed bidirectional digital cable transmission system 108 1994
5969584 Resonating structure providing notch and bandpass filtering 38 1997
 
AMERICAN TELEPHONE AND TELEGRAPH COMPANY (1)
* 5054050 Drop testing in fiber to the home systems 67 1990
 
New Potency Products, Inc. (1)
5167632 Syringe 55 1992
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
4807259 Time synchronization method in data transmission system 109 1987
 
POLAROID CORPORATION (1)
4587066 Method and apparatus for forming magnetic recording media 38 1984
 
TYCO INTERNATIONAL (PA), INC., A CORPORATION OF NEVADA (1)
* 5111497 Alarm and test system for a digital added main line 163 1990
 
WI-LAN INC. (1)
5282222 Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum 588 1992
 
HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP (2)
5802278 Bridge/router architecture for high performance scalable networking 293 1996
6577642 Method and system for virtual network administration with a data-over cable system 182 1999
 
International Mobile Machines Corporation (2)
4953197 Combination spatial diversity system 92 1988
5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels 247 1989
 
THOMSON-CSF (3)
4561101 Clock-frequency recovery device adapted to high-frequency radiocommunications in disturbed media 38 1983
5313169 Method of realigning the local oscillators of a receiver and device for implementing the method 64 1992
5329552 Method of binary encoding the points of a constellation used in a multicarrier modulation of OFDM type 47 1992
 
THOMSON CONSUMER ELECTRONICS SALES GMBH (1)
5584051 Radio broadcast transmission system and receiver for incompatible signal formats, and method therefor 104 1994
 
ECHELON CORPORATION (1)
5355114 Reconstruction of signals using redundant channels 186 1994
 
CNR-STIBNOT, A CORP. OF ITALY (1)
4503533 Local area communication network utilizing a round robin access scheme with improved channel utilization 147 1981
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
5425050 Television transmission system using spread spectrum and orthogonal frequency-division multiplex 159 1993
 
KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA (3)
4566100 Bit error rate measuring system 60 1983
4783779 Frequency assignment system in FDMA communication system 112 1986
5613193 Compensation of frequency offset 97 1994
 
NEC CORPORATION (8)
4661945 Differential coding system and apparatus therefor 37 1984
4621355 Method of synchronizing parallel channels of orthogonally multiplexed parallel data transmission system and improved automatic equalizer for use in such a transmission system 52 1984
4613975 Selective fading protection system 46 1984
4575682 Circuit for establishing accurate sample timing 44 1984
4677647 Synchronization of multichannel receiver based on higher quality channels 45 1985
4827473 Packet switching system 39 1987
5423067 Digital mobile communications system and method for providing intensity/coverage reference maps using base stations and mobile stations 134 1992
5526348 Area radio communication with radio channels divided into channel groups 35 1994
 
HITACHI AMERICA, LTD. (1)
5282023 Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters 212 1992
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (6)
6243369 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 112 1998
6201796 Startup protocol for high throughput communications systems 60 1998
6212225 Startup protocol for high throughput communications systems 45 1998
6819709 Startup protocol for high throughput communications system 35 2000
6792038 Startup protocol for high throughput communications systems 43 2001
2002/0061,012 Cable modem with voice processing capability 270 2001
 
INFORMATION RESOURCES, INC. (2)
4331974 Cable television with controlled signal substitution 344 1980
4404589 Cable television with multi-event signal substitution 181 1980
 
Mitel Telecom Limited (1)
5005183 Wireless telephone system 150 1989
 
Tokyo Shibaura Denki Kabushiki Kaisha (1)
4617656 Information transmission system with modems coupled to a common communication medium 131 1986
 
ALCATEL-LUCENT USA INC. (5)
5528582 Network apparatus and method for providing two way broadband communications 145 1994
5631846 Upstream communications for interactive networks 106 1995
6055242 Method and apparatus enabling synchronous transfer mode, variable length and packet mode access for multiple services over a broadband communication network 147 1997
6028933 Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network 175 1997
6349138 Method and apparatus for digital transmission incorporating scrambling and forward error correction while preventing bit error spreading associated with descrambling 72 1997
 
MITEL CORPORATION (1)
4866732 Wireless telephone system 249 1986
 
HONEYWELL INTERNATIONAL INC. (1)
7372859 Self-checking pair on a braided ring network 69 2004
 
Pioneer Electronic Corporation (1)
4558358 Cable network monitoring system for CATV system 68 1982
 
Catel Telecommunications, Inc. (1)
4959862 Active multichannel video processing hub for optimum transition from fiber to coax 95 1988
 
ALCATEL NETWORK SYSTEMS, INC. (4)
4393493 Automatic protection apparatus for span lines employed in high speed digital systems 79 1980
5185736 Synchronous optical transmission system 329 1989
5181106 Video line shelf arrangement in an optical fiber telecommunications network providing broadband switched video services 114 1991
5528283 Switched video distribution apparatus 58 1992
 
ALCATEL N.V. (4)
* 4748689 Fiber-optic distribution system for broadband signals 68 1986
4775210 Voice and data distribution system with fiber optic multinode star network 42 1986
5337175 Optical communications system for the subscriber area with optical amplifiers 60 1992
5373502 Process, transmitter and receiver for data transmission with variable traffic volume and a control station for coordinating several such transmitters and receivers 217 1993
 
MANITOBA TELEPHONE SYSTEM, THE (2)
4430731 Video and data distribution module with subscriber terminal 175 1981
4484218 Video distribution control system 214 1981
 
TEKNEKRON COMMUNICATIONS SYSTEMS, INC. (1)
5255290 Method and apparatus for combined frequency offset and timing offset estimation 79 1992
 
MATSUSHITA ELECTRIC CORPORATION OF AMERICA (1)
5485630 Audio/video distribution system 81 1994
 
STANDARD ELEKTRIK LORENZ AKTIENGESELLSCHAFT (1)
* 4686667 Broadband integrated subscriber loop system 79 1985
 
TERAYON CORPORATION (1)
5966376 Apparatus and method for digital data transmission using orthogonal cyclic codes 54 1995
 
CATERPILLAR INC. (1)
5588413 Engine assembly with leaf spring cam follower 35 1995
 
Terayon Communication System, Inc. (1)
6937617 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 52 2001
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
* 4709406 A.F.C. system for broad-band FM receiver 52 1986
5802241 Communication system 115 1996
 
ATMEL CORPORATION (1)
5553076 Method and apparatus for a wireless local area network 92 1994
 
ARRIS INTERNATIONAL, INC. (1)
5425027 Wide area fiber and TV cable fast packet cell network 161 1993
 
JVC KENWOOD CORPORATION (1)
5732068 Signal transmitting apparatus and signal receiving apparatus using orthogonal frequency division multiplexing 141 1995
 
SONY CORPORATION (2)
5471464 Orthogonal frequency division multiplex demodulation apparatus 136 1994
5903546 Means and method of improving multiplexed transmission and reception by coding and modulating divided digital signals 88 1996
 
HANSEN, TOM (1)
2005/0122,218 Ranging and warning device using emitted and reflected wave energy 35 2003
 
Toyotomi Kogyo Co., Ltd. (1)
5030085 Wick operating structure of lever actuation type for oil burner 25 1989
 
COMVERGE, INC. (1)
5896382 Method and apparatus for communicating information between a headend and subscriber over a wide area network 107 1996
 
SAMSUNG ELECTRONICS CO., LTD. (3)
4996706 Method of controlling the electric power supplied to a modem 74 1989
6005861 Home multimedia network architecture 233 1999
2007/0053,465 Apparatus and method for performing ranging in a communication system 30 2006
 
HYBRID PATENTS INCORPORATED (4)
5347304 Remote link adapter for use in TV broadcast data transmission system 280 1993
5586121 Asymmetric hybrid access system and method 457 1995
5959660 Subchannelization scheme for use in a broadband communications system 92 1996
5946322 Hybrid access system utilizing credit/done polling protocols 111 1996
 
NAXOS DATA LLC (1)
5303229 Optical network unit 137 1991
 
SHERWOOD PARTNERS, INC. (1)
6512737 Stacked carrier discrete multiple tone communication system 145 2000
 
Zellweger Tellecommunications Ltd. (1)
4853686 Method and apparatus for establishing a connection in shortwave radio networks 62 1987
 
NXP B.V. (1)
5541965 Carrier frequency synchronization device using two different B/W filters 52 1994
 
TIMES FIBER COMMUNICATIONS, INC. (1)
4491983 Information distribution system 211 1982
 
UNWIRED PLANET, LLC (1)
5673291 Simultaneous demodulation and decoding of a digitally modulated radio signal using known symbols 152 1994
 
XIAM TREA PTE, L.L.C. (1)
5768309 Unified trellis encoder 60 1994
 
LCTL WIRELESS INVESTMENT, LLC (1)
5375140 Wireless direct sequence spread spectrum digital cellular telephone system 177 1992
 
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA (1)
5455547 Microelectromechanical signal processors 94 1994
 
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (1)
4907233 VLSI single-chip (255,223) Reed-Solomon encoder with interleaver 86 1988
 
THE UNIVERSITY OF BRITISH COLUMBIA (1)
5444697 Method and apparatus for frame synchronization in mobile OFDM data communication 197 1993
 
Applied Spectrum Technologies, Inc. (1)
4677686 Passive transmission of data over cable TV systems 74 1983
 
NOKIA MOBILE PHONES LTD. (1)
5214687 Method to determine transmission quality 89 1991
 
Canai Computer and Network Architecture Inc. (1)
5157659 Packet communication system and method of clearing communication bus 82 1990
 
SAMOYLENKO, IRAIDA IVANOVNA (1)
5576702 Method and apparatus for fault-tolerant transmission in multi-channel networks 42 1995
 
Nippon Electric Co., Ltd. (1)
4300229 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 67 1980
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
5170470 Integrated modem which employs a host processor as its controller 84 1988
 
NEXTIRAONE, LLC (1)
5177739 Multiport - multipoint digital data service 71 1990
 
HTC CORPORATION (125)
6334219 Channel selection for a hybrid fiber coax network 166 1996
6292651 Communication system with multicarrier transport distribution network between a head end terminal and remote units 61 1997
* 6418558 Hybrid fiber/coax video and telephony communication 116 1997
6275990 Transport of payload information and control messages on multiple orthogonal carriers spread throughout substantially all of a frequency bandwith 211 1999
6279158 Dynamic bandwidth allocation 129 1999
6282683 Communication system with multicarrier telephony transport 52 1999
6330241 Multi-point to point communication system with remote unit burst identification 114 1999
6336201 Synchronization in a communications system with multicarrier telephony transport 72 1999
6366585 Distributed control in a communication system 76 1999
6434583 Fast fourier transform apparatus and method 77 1999
6477354 Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band 45 1999
6487405 Communication system with multicarrier telephony transport for controlling a plurality of service units 47 1999
6535715 Hybrid/fiber coax video and telephony communication system with poly-phase filtering 62 1999
6594322 Method of distributed loop control for a multicarrier telephony transport 64 1999
6603822 Communicating errors in a telecommunications system 57 1999
6606351 Ingress protection in a communication system with orthogonal carriers 58 1999
6415133 Acquisition and tracking in communication system with multicarrier telephony transport 69 1999
6467092 Method for adjusting power in a communication system with multicarrier telephony transport 92 1999
6510229 Communication system with multicarrier telephony transport 57 1999
2002/0098,797 ACQUISITION AND TRACKING IN COMMUNICATION SYSTEM WITH MULTICARRIER TELEPHONY TRANSPORT 34 1999
2002/0098,798 COMMUNICATION SYSTEM WITH MULTICARRIER TELEPHONY TRANSPORT 33 1999
7002898 Asymmetrical transport of data 73 2000
7123592 Dynamic allocation of transmission bandwidth in a communication system 36 2001
7069577 Dynamic bandwidth allocation 131 2001
6608835 Communication system with multicarrier telephony transport 50 2002
6662367 Poly-phase filters in multicarrier communication systems 53 2002
7310522 Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communication 61 2002
2002/0105,950 Computer data transmission over a telecommunications network 39 2002
2002/0107,979 Computer data transmission over a telecommunictions network 37 2002
2004/0042,387 Communication system with multicarrier telephony transport 64 2002
2003/0032,390 Acquisition and tracking in communication system with multicarrier telephony transport 40 2002
2007/0183,591 DYNAMIC BANDWIDTH ALLOCATION 46 2006
2007/0116,209 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 37 2007
2007/0115,803 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 28 2007
2007/0157,277 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 28 2007
2007/0162,943 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 32 2007
2007/0157,278 CONTENTION-BASED ACCESS TO TONES IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WAVEFORM 30 2007
2007/0110,096 CONTENTION-BASED ACCESS TO TONES IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WAVEFORM 41 2007
2007/0217,324 DISTRIBUTED CONTROL IN SYNCHRONIZING REMOTE UNITS TO HOST UNIT 28 2007
2007/0201,345 DISTRIBUTED CONTROL OF CARRIER FREQUENCY IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 29 2007
2007/0217,325 DISTRIBUTED CONTROL IN SYNCHRONIZING REMOTE UNITS TO HOST UNIT 28 2007
2007/0110,220 DISTRIBUTED CONTROL OF CARRIER FREQUENCY IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 28 2007
2007/0201,628 DISTRIBUTED CONTROL OF POWER IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 33 2007
2007/0206,491 DISTRIBUTED CONTROL OF POWER IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 29 2007
2007/0195,687 SYMBOL ALIGNMENT IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 28 2007
2007/0204,317 SYMBOL ALIGNMENT IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 29 2007
2007/0174,890 SYNCHRONIZED MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION 31 2007
2008/0037,663 TIMING AND SYMBOL ALIGNMENT IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 28 2007
7492791 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 32 2007
7539126 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 28 2007
2007/0147,229 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 29 2007
2008/0273,607 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 33 2007
7352690 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 31 2007
7426177 Round trip delay adjustment in multipoint-to-point communication using orthogonal frequency division multiplexing 34 2007
7280564 Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing 62 2007
7352779 System for multi-frame alignment 32 2007
2007/0280,099 MULTIFRAME ALIGNMENT IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 30 2007
2007/0186,260 METHODS FOR MULTIFRAME ALIGNMENT 28 2007
2008/0123,514 METHODS FOR MULTIFRAME ALIGNMENT 29 2007
7440391 Method and system for dynamic bandwidth allocation 31 2007
2007/0186,261 DATA-SPECIFIC BANDWIDTH ALLOCATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHGONAL FREQUENCY DIVISION MULTIPLEXING 35 2007
2008/0043,612 COARSE AND FINE SYNCHRONIZATION ADJUSTMENTS 78 2007
7355963 Tone allocation in multipoint-to-point communication using orthgonal frequency division multiplexing 31 2007
2008/0049,599 TONE HOPPING IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM 31 2007
7420913 Method for tone hopping in a multipoint-to-point orthogonal frequency division multiplexing communication system 29 2007
2007/0286,240 GUARD TONES IN A MULTI-POINT TO POINT ORTHOGINAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 28 2007
2007/0195,689 METHOD AND SYSTEM FOR ADAPTIVE MODULATION 31 2007
2007/0201,346 MULTIPOINT-TO-POINT COMMUNICATION USING ORTHGONAL FREQUENCY DIVISION MULTIPLEXING AND IDENTIFICATION CODES 39 2007
2007/0201,347 USE OF GUARD BANDS IN MULTIPOINT-TO-POINT ORTHGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION 29 2007
2007/0201,348 USE OF IDENTIFIER OF REMOTE UNIT FOR DOWNSTREAM SIGNALS 29 2007
2007/0201,573 SYSTEM FOR VARIABLE FORWARD ERROR CORRECTION IN A MULTIPOINT TO POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 31 2007
2007/0206,693 ADAPTIVE MODULATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 34 2007
7391711 Method and system for adaptive modulation 30 2007
2007/0211,617 VARIABLE ERROR CORRECTION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 29 2007
7417944 Method for orderwire modulation 29 2007
7436812 System for oderwire modulation 28 2007
2007/0223,363 CONTROL MODULATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 26 2007
7394753 Training premable in multipoint-to-point communication using orthogonal frequency division multiplexing 28 2007
2007/0230,325 METHOD AND SYSTEM FOR TRAINING SEQUENCES 26 2007
7355964 Systems for contention-based bandwidth requests in orthogonal frequency division multiplexing systems 32 2007
2007/0237,070 METHODS FOR CONTENTION-BASED BANDWIDTH REQUESTS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS 35 2007
2007/0237,182 CONTENTION-BASED ACCESS IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 26 2007
2007/0242,597 SCANNING BY REMOTES IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 28 2007
7391712 Method and system for forward-looking tone allocation 34 2007
7443784 Methods and systems for tone hopping 28 2007
2007/0274,200 REMOTE BAND SCANNING IN MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULITIPLEXING COMMUNICATION 29 2007
2007/0274,202 FORWARD-LOOKING TONE ALLOCATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 27 2007
7385916 System for multiple use subchannels 30 2007
2007/0253,500 METHOD FOR MULTIPLE USE SUBCHANNELS 31 2007
7414960 Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing 31 2007
2007/0263,665 SYSTEMS FOR CONTENTION-BASED BANDWIDTH REQUESTS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS 29 2007
7420914 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 29 2007
2008/0025,202 SCANNING BY REMOTES IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 29 2007
2008/0025,284 SYSTEM FOR MULTI-FRAME ALIGNMENT 28 2007
7414961 System and method for multiframe alignment in a multipoint-to-point orthogonal frequency division multiplexing system 29 2007
2008/0025,201 SYSTEM AND METHOD FOR RANGING AND ROUND TRIP DELAY ADJUSTMENT IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 31 2007
7400572 System and method for contention based tones in a multipoint-to-point orthogonal frequency division multiplexing system 29 2007
2008/0031,127 SYSTEM AND METHOD FOR ORDERWIRE MODULATION IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 46 2007
7408873 System and method for round trip delay adjustment in a multipoint-to-point orthogonal frequency division multiplexing system 30 2007
2008/0037,414 SYSTEM AND METHOD FOR MULTIFRAME ALIGNMENT IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 28 2007
2008/0037,415 SYSTEM AND METHOD FOR RANGING IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 28 2007
2008/0040,763 SYSTEM AND METHOD FOR CONTENTION BASED TONES IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 30 2007
2008/0043,704 SYSTEM AND METHOD FOR ORDERWIRE MODULATION IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 32 2007
2008/0049,604 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 29 2007
2008/0049,856 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2008/0049,860 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2008/0056,119 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 37 2007
2008/0056,398 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2008/0063,010 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2008/0082,598 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 29 2007
2008/0225,690 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 37 2007
2008/0225,691 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 37 2007
2008/0225,692 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2008/0240,214 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 30 2007
2008/0240,410 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2008/0253,435 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 28 2007
2009/0225,818 SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING 18 2007
2009/0067,516 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 17 2007
7697453 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 19 2008
7706349 Methods and systems for selecting modulation in an orthogonal frequency division multiplexing system 19 2008
2009/0074,095 SYSTEM FOR MULTI-FRAME ALIGNMENT 19 2008
2009/0080,505 RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM 18 2008
2009/0080,554 TONE ALLOCATION IN MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 18 2008
2009/0316,816 METHOD FOR MULTIPLE USE SUBCHANNELS 22 2009
2010/0014,605 SYSTEM FOR MULTIPLE USE SUBCHANNELS 22 2009
 
MACROVISION CORPORATION (1)
4506387 Programming-on-demand cable system and method 436 1983
 
NORTEL NETWORKS LIMITED (1)
4500989 Digital communication system 62 1982
 
IPCOM GMBH & CO. KG (1)
5390216 Synchronization method for a mobile radiotelephone 126 1993
 
NCR CORPORATION (1)
4847880 Multipoint modem system having fast synchronization 83 1988
 
SIECOR PUERTO RICO, INC. (1)
4800588 Telephone network interface system 94 1985
 
NOKIA TECHNOLOGIES OY (3)
5557639 Enhanced decoder for a radio telephone 95 1994
5703873 Method and apparatus for synchronizing subscriber equipment with base stations in a CDMA radio network 103 1995
2002/0172,293 Non-zero complex weighted space-time code for multiple antenna transmission 56 2001
 
ASCEND COMMUNICATIONS, INC. (1)
* 5058133 Method and apparatus for digital communication 56 1990
 
COMSAT CORPORATION (2)
4602375 Onboard clock correction by means of drift prediction 48 1982
4475211 Digitally controlled transversal equalizer 49 1982
 
Comsat Laboratories (1)
5216696 Programmable noise bandwidth reduction by means of digital averaging 46 1991
 
Grayline International Limited (1)
5454037 Portable secure-telephone communications module 61 1993
 
ROHDE & SCHWARZ GMBH & CO. KG (1)
5521943 COFDM combined encoder modulation for digital broadcasting sound and video with PSK, PSK/AM, and QAM techniques 100 1993
 
INTELLECTUAL VENTURES I LLC (4)
5652772 Method and apparatus for synchronization in digital transmisison systems of the OFDM type 130 1996
5784363 Arrangement in a multi-user system 118 1996
5726973 Method and arrangement for synchronization in OFDM modulation 93 1996
5909436 Random access orthogonal frequency division multiplex system and method 122 1996
 
Radix Wireless, Inc. (1)
6128276 Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays 329 1997
 
SCIENTIFIC-ATLANTA, INC. (2)
4466017 Sync suppression scrambling of television signals for subscription TV 128 1981
4642688 Method and apparatus for creating encrypted and decrypted television signals 132 1985
 
INTELLECTUAL VENTURES II LLC (1)
5963557 High capacity reservation multiple access network with multiple shared unidirectional paths 295 1997
 
The United States of America as represented by the Secretary of the Army (1)
4494228 Orthogonal code division multiple access communications systems 90 1982
 
AMATI COMMUNICATIONS CORPORATION (6)
5596604 Multicarrier modulation transmission system with variable delay 196 1993
5625651 Discrete multi-tone data transmission system using an overhead bus for synchronizing multiple remote units 223 1994
5627863 Frame synchronization in multicarrier transmission systems 154 1994
5644573 Methods for coordinating upstream discrete multi-tone data transmissions 166 1995
5838799 Digital sound broadcasting using a dedicated control channel 90 1995
5933454 Multi-carrier data transmissions system using an overhead bus for synchronizing multiple remote units 87 1997
 
TTI INVENTIONS A LLC (1)
4891694 Fiber optic cable television distribution system 167 1988
 
CDC PROPRIETE INTELLECTUELLE (1)
5293382 Method for FDMA signal multiplexing and demultiplexing 47 1993
 
PAC-TEL CORPORATION (1)
5193109 Zoned microcell with sector scanning for cellular telephone system 195 1991
 
MOTOROLA MOBILITY, INC. (1)
5327575 Directional handover control in digital mobile radio systems employing MAHO 132 1992
 
MATRA MARCONI SPACE UK LIMITED (1)
5293329 Apparatus for and method of digital signal processing 50 1992
 
HMD HOLDINGS (2)
5063574 Multi-frequency differentially encoded digital communication for high data rate transmission through unequalized channels 130 1990
5166924 Echo cancellation in multi-frequency differentially encoded digital communications 147 1990
 
ROBERTSHAW CONTROLS COMPANY (1)
5002038 Burner construction and method of making the same 48 1989
 
NEW VIACOM INTERNATIONAL CORP. (1)
6011950 Apparatus and method for using forward error correction setting to enable simultaneous use of multiple modulation systems on terrestrial distribution networks 44 1999
 
NTT MOBILE COMMUNICATIONS NETWORK INC. (1)
5537443 Interference signal cancelling method, receiver and communication system using the same 118 1994
 
HARRIS, JR., ROBERT CLAUDE, TRUSTEE OF THE ROBERT CLAUDE HARRIS, JR., REVOCABLE LIVING TRUST (1)
* 5121409 Multichannel satellite communication and control system 52 1990
 
NIPPON HOSO KYOKAI (1)
5406551 Method and apparatus for digital signal transmission using orthogonal frequency division multiplexing 175 1993
 
GPT LIMITED (1)
6097736 Telecommunications network 46 1995
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION (1)
5802117 Method and apparatus for joint frequency offset and timing estimation of a multicarrier modulation system 98 1996
 
INTELSTAT (1)
5515056 Burst tone range processing system and method 34 1993
 
PANASONIC CORPORATION (1)
5600672 Communication system 130 1994
 
TELEDIFFUSION DE FRANCE (7)
4881241 Method and installation for digital communication, particularly between and toward moving vehicles 170 1988
5315584 System of data transmission by sharing in the time-frequency space with channel organization 93 1991
5307376 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 125 1992
5357502 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 90 1993
5452288 Method for the transmission of digital data in radio paging systems and corresponding radio paging receiver 152 1993
5610944 Process and device for segmentation into sub-bands and for reconstruction of a digital signal, and corresponding device 47 1993
RE36430 Device for the transmission of digital data with at least two levels of protection and corresponding reception device 75 1995
 
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD. (1)
2007/0076,589 Method and device for handling ranging signals in a wireless communications network 34 2006
 
MICROSEMI SEMICONDUCTOR (U.S.) INC. (1)
6125139 Narrowband digital cordless telephone 88 1996
 
CINCINNATI ELECTRONICS CORPORATION (1)
4879527 Phase lock loop and improved phase detector therefor 42 1989
 
HITACHI, LTD. (2)
4604745 Method of searching fault locations in digital transmission line 49 1984
5537414 Method of wireless communication between base station and mobile station and multiple access communication system 242 1993
 
GOOGLE TECHNOLOGY HOLDINGS LLC (1)
5802044 Multicarrier reverse link timing synchronization system, device and method 134 1996
 
The United States of America as represented by the United States Department of Energy (1)
5608404 Imaging synthetic aperture radar 60 1993
 
TC TECHNOLOGY LLC (1)
* 5815488 Multiple user access method using OFDM 218 1995
 
KABUSHIKI KAISHA TOSHIBA (5)
4868811 Multiple access communication system 94 1988
5440268 AFC circuit for QPSK demodulator 66 1994
5608764 OFDM synchronization demodulation circuit 158 1994
5646935 Hierarchical quadrature frequency multiplex signal format and apparatus for transmission and reception thereof 91 1995
5694389 OFDM transmission/reception system and transmitting/receiving apparatus 256 1996
 
MARCONI COMMUNICATIONS GMBH (1)
4847872 Method and arrangement for synchronizing a receiver in digital transmission systems 44 1988
 
BELL TELEPHONE LABORATORIES, INCORPORATED (7)
4316284 Frame resynchronization circuit for digital receiver 128 1980
4316285 Framing circuit for digital receiver 59 1980
4397020 Error monitoring in digital transmission systems 147 1981
4488004 Providing feature transparency between a plurality of PBXs 88 1982
4488294 Establishing and supporting data traffic in private branch exchanges 53 1982
* 4763317 Digital communication network architecture for providing universal information services 475 1985
* 4727575 State control for a real-time system utilizing a nonprocedural language 46 1985
 
CONOCO INC. (1)
4613980 System for high accuracy remote decoding 36 1984
 
AT&T Information Systems Inc. (1)
4651320 Inband coding of secondary data 51 1984
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (10)
* 4769761 Apparatus and method for isolating and predicting errors in a local area network 118 1986
4975916 Character snychronization 59 1988
4991133 Specialized communications processor for layered protocols 164 1988
4942602 Coordinated transfer of voice and information through a network of digital switches 76 1989
5347632 Reception system for an interactive computer network and method of operation 1132 1989
5331642 Management of FDDI physical link errors 127 1992
5299201 Method and apparatus for isolating faults in a network having serially connected links 67 1993
5321542 Control method and apparatus for wireless data link 159 1993
5519706 Dynamic user registration method in a mobile communications network 173 1994
6338091 System for optimistic transmission flow control including receiver data discards upon inadequate buffering condition 29 1997
 
AT&T IPM CORP. (5)
5513184 Wireless communication system 64 1993
5420851 Method of multiple access 219 1993
5488412 Customer premises equipment receives high-speed downstream data over a cable television system and transmits lower speed upstream signaling on a separate channel 398 1994
5534913 Apparatus and method for integrating downstream data transfer over a cable television channel with upstream data carrier by other media 295 1994
5513248 Cordless telephone micro-cellular system 60 1994
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 5095482 Method of and apparatus of individually monitoring transmission sections of a communications transmission link 42 1989
 
CONCORD COMMUNICATIONS, INC. (1)
* 5115451 Local area network modem 55 1988
 
MICROCOM, INC. (1)
* 4691314 Method and apparatus for transmitting data in adjustable-sized packets 89 1985
 
M/A-COM TELECOMMUNICATIONS, INC., (1)
* 4768188 Optical demand assigned local loop communication system 119 1986
 
TVWORKS, LLC (2)
* 4734764 Cable television system selectively distributing pre-recorded video and audio messages 316 1985
5195092 Interactive multimedia presentation & communication system 450 1991
 
SOUND VIEW INNOVATIONS, LLC (2)
6041051 Method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network utilizing an adaptive digital access protocol 92 1997
6075787 Method and apparatus for messaging, signaling, and establishing a data link utilizing multiple modes over a multiple access broadband communications network 242 1997
 
FUJITSU LIMITED (3)
4809298 Radio data transmission system 37 1987
5216697 Signal quality detector circuit 46 1990
5226081 Multi-carrier communication system using ciphered carrier bit assignment information 57 1991
 
ROBERT BOSCH GMBH (1)
* 5111460 Process for the localization of defective stations in local networks and associated interface controller 61 1991
 
BARD TECHNOLOGIES, U.S.A. A PARTNERSHIP OF NEW YORK (1)
4646296 Distributed telephone system 134 1984
 
HARRIS CORPORATION (3)
4367548 Subscriber station for providing multiple services to a subscriber 222 1980
4528656 Radio communication system using frequency division multiplexing for transmission between a master station and a plurality of remote stations 112 1982
* 4707832 Switched point-to-point local area network control mechanism 74 1985
 
CASIO COMPUTER CO., LTD. (1)
5083218 Hand-held image reading apparatus 81 1990
 
Mark J. Dapper (1)
2001/0032,334 INGRESS PROTECTION IN A COMMUNICATION SYSTEM WITH ORTHOGONAL CARRIERS 39 1999
 
GO NET SYSTEMS LTD. (5)
2007/0121,546 Simultaneous simulcast and single cast hybrid multi-tone communication system 58 2006
2007/0121,573 hybrid system having multiple downlink channels and a single uplink channel 30 2006
2007/0121,743 Ubiquitous coverage OFDM hybrid system 33 2006
2007/0121,744 Hybrid point to multipoint communication system 34 2006
2007/0121,745 Filtering process for enhancing OFDMA uplink reception sensitivity 32 2006
 
TELECABLE VIDEOTRON LTD. (1)
4623920 Cable network data transmission system 222 1983
 
DAPHIMO CO. B.V., LLC (1)
2003/0026,282 Splitterless multicarrier modem 39 2002
 
TITAN CORPORATION, THE (1)
4912705 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels 226 1989
 
WORLD GATE COMMUNICATIONS, LLC (1)
5999970 Access system and method for providing interactive access to an information source through a television distribution system 167 1996
 
ZENITH ELECTRONICS CORPORATION (2)
4528663 Peak load access in a two-way CATV contention system 72 1983
5546119 Transmission modulator for cable television upstream data transmission 41 1994
 
INTELSAT SERVICES CORPORATION (1)
4858225 Variable bandwidth variable center-frequency multibeam satellite-switched router 84 1987
 
MOTOROLA SOLUTIONS, INC. (2)
5343499 Quadrature amplitude modulation synchronization method 68 1992
5365525 Method for reducing bandwidth of a wireline communication path 39 1992
 
LICENTIA PATENT-VERWALTUNGS-GMBH (3)
4441180 Service integrated communication transmission and interchange system 148 1980
4395780 Service-integrated communication transmission and exchange system 113 1981
4545048 Service integrated digital transmission system 62 1981
 
AT&T Bell Laboratories (3)
4495619 Transmitter and receivers using resource sharing and coding for increased capacity 239 1984
* 5101290 High-performance packet-switched WDM ring networks with tunable lasers 68 1990
5278889 Video telephony dialing 164 1992
 
MICROSOFT TECHNOLOGY LICENSING, LLC (1)
5479168 Compatible signal encode/decode system 171 1993
 
AGENCE SPATIALE EUROPEENNE (2)
5297136 Multicarrier demodulator 41 1992
5327455 Method and device for multiplexing data signals 200 1993
 
RCA Corporation (1)
4519074 Transceiver having collision detection capability for contention-formatted FDM local area networks 73 1983
 
GENERAL INSTRUMENT CORPORATION (GIC-4) (1)
4533948 CATV Communication system 228 1982
 
QUALCOMM INCORPORATED (4)
5103459 System and method for generating signal waveforms in a CDMA cellular telephone system 1662 1990
5504773 Method and apparatus for the formatting of data for transmission 282 1993
5600754 Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors 89 1994
5943361 System and method for generating signal waveforms in a CDMA cellular telephone system 181 1995
 
GENERAL ELECTRIC COMPANY (2)
4774707 Random access communication system with scheduled data transmission and asynchronous contention scheduling 132 1986
* 4701911 Media accessing apparatus and method for communication system 39 1986
 
VERIZON PATENT AND LICENSING INC. (8)
* 5072441 Packet switched information network with universal access to enhanced network services 56 1990
5512937 System for integrated distribution of switched voice and television on coaxial cable and with video signal transmission originating from subscriber locations 53 1994
5666293 Downloading operating system software through a broadcast channel 712 1995
5708961 Wireless on-premises video distribution using digital multiplexing 591 1995
5774689 Network configuration management system for digital communication networks 180 1995
5784683 Shared use video processing systems for distributing program signals from multiplexed digitized information signals 194 1995
5715242 System for integrated distribution of switched voice and television on coaxial cable with phase distortion correction 34 1995
6041056 Full service network having distributed architecture 214 1997
 
DEVON COUNTY COUNCIL, COUNTY HALL, EXETER, DEVON, ENGLAND A CORP. OF ENGLAND (1)
4821120 Television sub-carrier transmission 111 1986
 
L'Etat Francais and Telediffusion de France S.A. (1)
5191576 Method for broadcasting of digital data, notably for radio broadcasting at high throughput rate towards mobile receivers, with time frequency interlacing and analog synchronization 127 1991
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (1)
5479447 Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines 841 1993
 
ENTERASYS NETWORKS, INC. (1)
5029164 Congestion avoidance in high-speed network carrying bursty traffic 217 1990
 
SHARED TECHNOLOGIES FAIRCHILD TELECOM, INC. (1)
4644535 PCM channel multiplexer/demultiplexer 57 1984
 
MOBILE TELECOMMUNICATIONS TECHNOLOGIES, LLC (1)
5590403 Method and system for efficiently providing two way communication between a central network and mobile unit 99 1992
 
DIGITAL RADIO EXPRESS, INC. (1)
5748677 Reference signal communication method and system 169 1996
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (1)
5283811 Decision feedback equalization for digital cellular radio 107 1991
 
ERICSSON INC. (2)
5353307 Automatic simulcast alignment 134 1993
5956338 Protocol for broadband data communication over a shared medium 116 1996
 
WAVEPHORE CORPORATION (1)
5387941 Data with video transmitter 200 1992
 
ADC TELECOMMUNICATIONS, INC. (1)
5519830 Point-to-multipoint performance monitoring and failure isolation system 133 1993
 
ALLEN-BRADLEY COMPANY, INC. (1)
5289474 Communication network interface testing system 47 1988
 
GENERAL DYNAMICS DECISION SYSTEMS, INC. (1)
4612626 Method of performing real input fast fourier transforms simultaneously on two data streams 47 1983
 
North American Philips Corporation (2)
* 5134464 Method and apparatus for the transmission and reception of a multicarrier digital television signal 166 1991
5291289 Method and apparatus for transmission and reception of a digital television signal using multicarrier modulation 207 1992
 
Windata, Inc. (1)
5276703 Wireless local area network communications system 279 1992
 
TECHNOLOGIES FUTURES, INC. D/B/A ORION TECHNOLOGY (4)
5088111 Modulation and demodulation system employing AM-PSK and FSK for communication system using digital signals 90 1989
* 5084903 Modulation and demodulation system employing AM-PSK and QPSK communication system using digital signals 128 1990
5272700 Spectrally efficient broadband transmission system 96 1991
5487066 Distributed intelligence network using time and frequency multiplexing 85 1994
 
DOBSON, KURT (1)
4943980 Multi-carrier high speed modem 80 1989
 
FRANCE TELECOM (1)
5299192 Digital filter-type frequency demultiplexing device 96 1992
 
UNISYS CORPORATION (1)
5499236 Synchronous multipoint-to-point CDMA communication system 121 1994
 
GENERAL DYNAMICS C4 SYSTEMS, INC. (1)
5128967 Symbol state trellis maximum likelihood detection method 71 1989
 
AT&T CORP. (6)
5371780 Communications resource assignment in a wireless telecommunications system 169 1993
6018528 System and method for optimizing spectral efficiency using time-frequency-code slicing 179 1994
5592470 Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynamic bandwidth/channel allocation 512 1994
5765097 Shared hybrid fiber-coax network having reduced ingress noise in the upstream channel transmitted via a repeater 95 1996
5878325 Hybrid fiber-coax system having at least one digital fiber node 100 1996
6064662 System and method for optimizing spectral efficiency using time-frequency-code slicing 138 1998
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
The United States of America as represented by the Secretary of the Navy (1)
* 8150325 Blanking system 3 2008
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (2)
* 8929197 Method and system for an OFDM joint training and frequency tracking system 0 2013
* 2014/0023,162 Method and System for An OFDM Joint Training and Frequency Tracking System 1 2013
* Cited By Examiner

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
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 - 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