US Patent No: 4,679,227

Number of patents in Portfolio can not be more than 2000

Ensemble modem structure for imperfect transmission media

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A high-speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line. The modem includes a system for variably allocating data and power among the carriers to compensate for equivalent noise and to maximize the data rate. Additionally, systems for eliminating the need for an equalization network, for adaptively allocating control of a channel, and for tracking variations in line parameters are disclosed.

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

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
TELEBIT CORPORATIONSAN JOSE, CA17

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hughes-Hartogs, Dirk Morgan Hill, CA 12 1216

Cited Art

Patent Info (Count) # Cites Year
 
CONEXANT SYSTEMS, INC. (2)
4,315,319 Non-linear signal processor 26 1980
4,573,133 Signal processor for compensating detector non-uniformities 16 1983
 
ALCATEL NETWORK SYSTEMS, INC. (1)
4,574,244 QAM Demodulator automatic quadrature loop using n-m LSB's 8 1984
 
AT&T Bell Laboratories (1)
4,495,619 Transmitter and receivers using resource sharing and coding for increased capacity 204 1984
 
GENERAL DYNAMICS DECISION SYSTEMS, INC. (1)
4,494,238 Multiple channel data link system 95 1982
 
Lignes Telegraphiques et Telephoniques (1)
4,459,701 Process and device for synchronizing at reception digital signals transmitted in packages 9 1982
 
New England Power Service Company (1)
4,559,520 Method for communication utilizing multi-mode reception 24 1982
 
PARADYNE CORPORATION (1)
4,555,790 Digital modem having a monitor for signal-to-noise ratio 16 1983
 
RACAL-DATACOM, INC. (1)
4,601,044 Carrier-phase adjustment using absolute phase detector 53 1983
 
Telebit Corporation (1)
4,438,511 Packetized ensemble modem 220 1980
 
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

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CISCO TECHNOLOGY, INC. (83)
5,793,978 System for routing packets by separating packets in to broadcast packets and non-broadcast packets and allocating a selected communication bandwidth to the broadcast packets 54 1994
6,147,996 Pipelined multiple issue packet switch 75 1995
6,091,725 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 157 1995
6,182,224 Enhanced network services using a subnetwork of communicating processors 26 1996
6,097,718 Snapshot routing with route aging 47 1996
6,035,105 Multiple VLAN architecture system 115 1996
6,243,667 Network flow switching and flow data export 159 1996
6,212,182 Combined unicast and multicast scheduling 50 1996
5,802,042 Autosensing LMI protocols in frame relay networks 56 1996
6,304,546 End-to-end bidirectional keep-alive using virtual circuits 33 1996
6,308,148 Network flow data export 52 1996
6,014,431 Communication server apparatus having four-wire switching interface and method 47 1997
6,088,430 Communication server apparatus and method 21 1997
6,356,530 Next hop selection in ATM networks 5 1997
6,122,272 Call size feedback on PNNI operation 19 1997
6,889,181 Network flow switching and flow data export 15 1997
6,160,843 Communication server apparatus providing XDSL services and method 41 1997
6,078,590 Hierarchical routing knowledge for multicast packet routing 86 1997
6,512,766 Enhanced internet packet routing lookup 15 1997
6,212,183 Multiple parallel packet routing lookup 43 1997
6,157,641 Multiprotocol packet recognition and switching 38 1997
6,366,644 Loop integrity test device and method for digital subscriber line (XDSL) communication 23 1997
5,999,565 Data communication using a modifiable number of XDSL modems 53 1997
6,163,599 Communication server apparatus and method 14 1997
6,343,072 Single-chip architecture for shared-memory router 68 1997
6,111,877 Load sharing across flows 36 1997
6,385,203 Communication server apparatus and method 78 1998
6,278,728 Remote XDSL transceiver unit and method of operation 12 1998
6,853,638 Route/service processor scalability via flow-based distribution of traffic 5 1998
6,181,572 Digital subscriber line (xDSL) modem having a multi-layer electromagnetic shield and method of manufacture 3 1998
6,920,112 Sampling packets for network monitoring 18 1998
6,370,121 Method and system for shortcut trunking of LAN bridges 20 1998
6,239,672 Wall mount filter for a digital subscriber line (xDSL) network and methods of installation and manufacture 26 1998
6,377,577 Access control list processing in hardware 76 1998
6,308,219 Routing table lookup implemented using M-trie having nodes duplicated in multiple memory banks 50 1998
6,182,147 Multicast group routing using unidirectional links 42 1998
6,532,215 Device and method for network communications and diagnostics 15 1998
6,389,506 Block mask ternary cam 68 1998
6,101,115 CAM match line precharge 31 1998
6,535,520 System and method of operation for managing data communication between physical layer devices and ATM layer devices 3 1998
6,434,120 Autosensing LMI protocols in frame relay networks 10 1998
6,381,245 Method and apparatus for generating parity for communication between a physical layer device and an ATM layer device 3 1998
6,330,599 Virtual interfaces with dynamic binding 15 1998
6,522,668 System and method for special signaling with customer premises equipment 6 1998
6,115,226 Apparatus for lightning strike survivability and post-strike operability 0 1998
5,999,540 Rate adaptive XDSL communication system and method 36 1998
6,771,642 Method and apparatus for scheduling packets in a packet switch 5 1999
6,161,161 System and method for coupling a local bus to a peripheral component interconnect (PCI) bus 16 1999
6,658,049 xDSL repeater system and method 9 1999
6,553,075 Method and apparatus for determining crosstalk 11 1999
7,065,762 Method, apparatus and computer program product for borrowed-virtual-time scheduling 6 1999
6,219,699 Multiple VLAN Architecture system 72 1999
6,757,791 Method and apparatus for reordering packet data units in storage queues for reading and writing memory 25 1999
6,760,331 Multicast routing with nearest queue first allocation and dynamic and static vector quantization 4 1999
6,603,772 Multicast routing with multicast virtual output queues and shortest queue first allocation 15 1999
7,181,504 System and method for selecting a modem for service 1 1999
6,347,093 Application programming interface for modem and ISDN processing 4 1999
6,483,870 Data communication using a modifiable number of XDSL modems 31 1999
6,389,065 Rate adaptive XDSL communication system and method 15 1999
6,798,776 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 17 2000
6,831,923 Pipelined multiple issue packet switch 52 2000
6,327,251 Snapshot routing 8 2000
6,603,765 Load sharing across flows 9 2000
6,870,834 Communication server apparatus providing XDSL services and method 3 2000
6,611,528 Hierarchical routing knowledge for multicast packet routing 21 2000
6,640,243 Enhanced network services using a subnetwork of communicating processors 3 2000
6,538,988 End-to-end bidirectional keep-alive using virtual circuits 11 2001
6,909,697 Method and apparatus for identifying a maximum frame size 2 2001
7,116,669 Format for automatic generation of unique ATM addresses used for PNNI 1 2001
7,076,543 Method and apparatus for collecting, aggregating and monitoring network management information 19 2002
7,286,525 Synchronous pipelined switch using serial transmission 1 2002
7,103,007 Autosensing LMI protocols in frame relay networks 2 2002
7,020,164 System and method for special signaling with customer premises equipment 0 2002
7,006,520 System and method of operation for managing data communication between physical layer devices and ATM layer devices 1 2003
6,917,966 Enhanced network services using a subnetwork of communicating processors 0 2003
7,443,858 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 4 2003
7,836,296 Method for blocking denial of service and address spoofing attacks on a private network 0 2004
7,260,518 Network flow switching and flow data report 15 2004
7,570,583 Extending SONET/SDH automatic protection switching 2 2005
8,116,298 Communication server apparatus providing XDSL services and method 0 2005
7,246,148 Enhanced network services using a subnetwork of communicating processors 4 2005
7,318,094 Apparatus, system and device for collecting, aggregating and monitoring network management information 3 2006
8,401,027 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 0 2008
 
MOSAID TECHNOLOGIES INCORPORATED (34)
7,436,842 Outlet with analog signal adapter, a method for use thereof and a network using said outlet 3 2001
7,542,554 Telephone outlet with packet telephony adapter, and a network using same 4 2001
7,317,793 Method and system for providing DC power on local telephone lines 29 2003
7,867,035 Modular outlet 0 2004
7,466,722 Telephone communication system over a single telephone line 0 2004
7,483,524 Network for telephony and data communication 12 2004
7,680,255 Telephone outlet with packet telephony adaptor, and a network using same 0 2004
7,769,030 Telephone outlet with packet telephony adapter, and a network using same 4 2004
7,492,875 Network for telephony and data communication 2 2004
7,397,791 Telephone communication system over a single telephone line 1 2005
7,522,713 Network for telephony and data communication 4 2005
7,633,966 Network combining wired and non-wired segments 8 2005
8,325,636 Local area network of serial intelligent cells 0 2005
7,702,095 Method and system for providing DC power on local telephone lines 2 2005
7,453,895 Outlet with analog signal adapter, a method for use thereof and a network using said outlet 9 2005
7,522,714 Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets 3 2006
7,274,688 Telephone communication system over a single telephone line 0 2006
7,715,534 Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets 2 2006
8,107,618 Method and system for providing DC power on local telephone lines 0 2006
7,686,653 Modular outlet 3 2006
8,270,430 Local area network of serial intelligent cells 0 2006
8,238,328 Telephone system having multiple distinct sources and accessories therefor 0 2006
8,000,349 Telephone communication system over a single telephone line 3 2007
7,593,394 Telephone communication system over a single telephone line 0 2007
7,953,071 Outlet with analog signal adapter, a method for use thereof and a network using said outlet 2 2008
7,873,058 Outlet with analog signal adapter, a method for use thereof and a network using said outlet 3 2008
7,860,084 Outlet with analog signal adapter, a method for use thereof and a network using said outlet 3 2008
8,223,800 Telephone communication system over a single telephone line 0 2008
7,889,720 Outlet with analog signal adapter, a method for use thereof and a network using said outlet 2 2008
8,351,582 Network for telephony and data communication 0 2008
8,363,797 Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets 0 2010
8,092,258 Modular outlet 1 2011
8,235,755 Modular outlet 0 2011
8,360,810 Modular outlet 0 2011
 
HTC CORPORATION (33)
6,334,219 Channel selection for a hybrid fiber coax network 81 1996
6,418,558 Hybrid fiber/coax video and telephony communication 81 1997
6,279,158 Dynamic bandwidth allocation 80 1999
6,467,092 Method for adjusting power in a communication system with multicarrier telephony transport 79 1999
7,123,592 Dynamic allocation of transmission bandwidth in a communication system 28 2001
7,069,577 Dynamic bandwidth allocation 70 2001
7,310,522 Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communication 31 2002
6,608,835 Communication system with multicarrier telephony transport 43 2002
7,535,822 Synchronization of remote units for a communication network 14 2006
7,672,219 Multipoint-to-point communication using orthogonal frequency division multiplexing 1 2007
7,675,843 Multipoint-to-point communication using orthogonal frequency division multiplexing 1 2007
7,983,141 Synchronized multipoint-to-point communication using orthogonal frequency division 2 2007
7,912,138 Timing and symbol alignment in multipoint-to-point communication using orthogonal frequency division multiplexing 1 2007
8,351,321 Systems and method for orthogonal frequency divisional multiplexing 0 2007
8,199,632 Systems and method for orthogonal frequency divisional multiplexing 1 2007
8,174,956 Systems and method for orthogonal frequency divisional multiplexing 0 2007
8,089,853 Systems and method for orthogonal frequency divisional multiplexing 0 2007
7,995,454 Systems and method for orthogonal frequency divisional multiplexing 4 2007
7,957,265 Systems and method for orthogonal frequency divisional multiplexing 1 2007
7,881,180 Systems and method for orthogonal frequency divisional multiplexing 0 2007
7,881,181 Systems and method for orthogonal frequency divisional multiplexing 6 2007
7,936,662 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 0 2007
7,872,985 System for multi-frame alignment 0 2008
7,773,537 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 1 2008
7,756,060 Tone allocation in multipoint-to-point communication using orthogonal frequency division multiplexing 0 2008
7,706,349 Methods and systems for selecting modulation in an orthogonal frequency division multiplexing system 15 2008
7,697,453 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 14 2008
8,213,398 Method for multiple use subchannels 0 2009
8,213,399 System for multiple use subchannels 0 2009
RE41771 System for multiple use subchannels 0 2009
RE42236 Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing 0 2009
8,406,115 Systems and methods for orthogonal frequency division multiplexing 0 2011
8,315,150 Synchronized multipoint-to-point communication using orthogonal frequency division 0 2011
 
INTELLECTUAL VENTURES II LLC (17)
6,798,735 Adaptive allocation for variable bandwidth multicarrier communication 9 1999
6,266,348 Splitterless multicarrier modem 89 2000
6,667,991 Method for synchronizing seamless rate adaptation 42 2000
6,567,473 Method for seamlessly changing power modes in a ADSL system 45 2000
6,498,808 Seamless rate adaptive multicarrier modulation system and protocols 47 2000
7,817,532 Adaptive allocation for variable bandwidth multicarrier communication 1 2006
7,649,928 Method for synchronizing seamless rate adaptation 5 2007
7,860,175 Method for seamlessly changing power modes in an ADSL system 5 2007
7,813,419 Method and multi-carrier transceiver with stored application profiles for supporting multiple applications 0 2008
8,031,619 Splitterless multicarrier modem 0 2009
8,045,601 Method for synchronizing seamless rate adaptation 0 2009
8,045,603 Method and a multi-carrier transceiver supporting dynamic switching between active application sets 0 2010
8,351,491 Method and multi-carrier transceiver with stored application profiles for supporting multiple applications 0 2010
8,369,275 Adaptive allocation for variable bandwidth multicarrier communication 0 2010
8,340,200 Method for seamlessly changing power modes in an ADSL system 0 2010
8,400,940 Splitterless multicarrier modem 0 2011
8,340,162 Method for synchronizing seamless rate adaptation 0 2011
 
PANASONIC COMMUNICATIONS CO., LTD. (14)
6,873,652 Activation of multiple xDSL modems with implicit channel probe 5 1999
6,950,459 Activation of multiple xDSL modems with half duplex and full duplex procedures 3 1999
6,751,254 Activation of multiple xDSL modems with power control measurement 16 2000
6,934,326 Activation of multiple xDSL modems with implicit channel probe 2 2002
6,987,802 Activation of multiple XDSL modems with implicit channel probe 1 2002
6,765,957 Activation of multiple xDSL modems with implicit channel probe 9 2002
6,999,506 Activation of multiple xDSL modems with half duplex and full duplex procedures 2 2003
7,012,954 Activation of multiple xDSL modems with implicit channel probe 0 2003
6,952,442 Activation of multiple xDSL modems with implicit channel probe 0 2003
6,901,547 Retransmission procedure and apparatus for handshaking protocol 1 2003
7,058,123 Activation of multiple xDSL modems with half duplex and full duplex procedures 1 2003
6,917,647 Activation of multiple xDSL modems with power control measurement 0 2004
7,508,867 Activation of multiple xDSL modems with implicit channel probe 1 2004
7,272,173 Activation of multiple xDSL modems with implicit channel probe 0 2005
 
BROADCOM CORPORATION (12)
7,133,443 Multi-tone transmission 1 2001
7,075,978 Multi-tone transmission 0 2001
7,020,188 Multi-tone transmission 0 2001
7,443,916 Method and apparatus for communication in the presence of impulse noise 5 2003
7,433,395 Reliable multicarrier communication in the presence of timing phase error 9 2004
7,421,015 Bit-loading in multicarrier communication systems in the presence of an asymmetric, correlated gaussian noise sources 6 2004
7,852,950 Methods and apparatuses for canceling correlated noise in a multi-carrier communication system 2 2005
7,953,163 Block linear equalization in a multicarrier communication system 1 2005
8,194,722 Various methods and apparatuses for impulse noise mitigation 0 2005
7,813,439 Various methods and apparatuses for impulse noise detection 1 2006
7,526,045 Multi-tone transmission 0 2006
7,903,757 Multi-tone transmission 0 2009
 
UNITED ACCESS TECHNOLOGIES, LLC (11)
6,185,284 Voice and data transmission over twisted wire pairs 31 1998
6,236,718 Video transmission and control system utilizing internal telephone lines 24 1999
6,243,446 Distributed splitter for data transmission over twisted wire pairs 28 1999
6,970,537 Video transmission and control system utilizing internal telephone lines 1 2001
7,110,511 Twisted pair communication system 3 2002
6,542,585 Distributed splitter for data transmission over twisted wire pairs 23 2002
7,145,990 High-speed data communication over a residential telephone wiring network 2 2003
7,577,240 Two-way communication over a single transmission line between one or more information sources and a group of telephones, computers, and televisions 0 2003
7,227,932 Multi-band data over voice communication system and method 0 2004
7,224,780 Multichannel transceiver using redundant encoding and strategic channel spacing 0 2004
7,149,289 Interactive data over voice communication system and method 2 2004
 
INTRATECH, INC. (9)
5,367,516 Method and apparatus for signal transmission and reception 17 1993
5,995,539 Method and apparatus for signal transmission and reception 95 1996
5,682,404 Method and apparatus for signal transmission and reception 25 1996
5,835,590 Method and apparatus for signal transmission and reception 7 1997
6,263,017 Method and apparatus for signal transmission and reception 20 1999
6,532,256 Method and apparatus for signal transmission and reception 57 2001
6,735,264 Compensation for non-linear distortion in a modem receiver 14 2001
6,973,124 Method and apparatus for signal transmission and reception 3 2003
7,173,966 Compensation for non-linear distortion in a modem receiver 9 2004
 
AT&T CORP. (6)
6,148,024 FFT-based multitone DPSK modem 21 1997
6,400,776 Method and apparatus for high speed data transmission by spectral decomposition of the signaling space 6 1998
7,012,953 Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space 3 2001
7,151,803 Multiuser allocation method for maximizing transmission capacity 7 2002
7,453,957 Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space 1 2005
7,436,893 Multiuser allocation method for maximizing transmission capacity 0 2006
 
ALCATEL (5)
6,628,738 Method of arrangement to determine a clock timing error in a multi-carrier transmission system, and a related synchronization units 36 1998
7,042,900 Housing for connection to both broadband and narrowband networks as a shelf in a telecommunications rack 1 2001
7,039,065 Telecommunications rack including shelves with nonredundant backplanes used redundantly 1 2001
7,099,313 Replaceable printed board assembly (PBA) 1 2001
7,092,394 Line termination equipment 1 2001
 
ALCATEL N.V. (5)
5,627,501 Signal coupler with automatic common line attenuation compensation 83 1995
5,768,318 Signal processor 15 1995
5,657,355 Signal processor module 17 1995
5,812,599 Method for allocating data elements in multicarrier applications and equipment to perform this method 88 1996
5,790,550 Method for allocating data elements to a set of carriers, mapping unit and modulator to perform this method 61 1996
 
CAIS, INC. {50%} (5)
5,929,896 RF broadcast system utilizing internal telephone lines 57 1996
5,844,596 Two-way RF communication at points of convergence of wire pairs from separate internal telephone networks 29 1997
5,949,473 Video transmission and control system utilizing internal telephone lines 27 1997
6,192,399 Twisted pair communication system 109 1998
6,181,783 Data and telephone wiring terminal 21 1998
 
CORNING MOBILEACCESS LTD (5)
7,813,451 Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting 15 2006
7,587,001 Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting 10 2008
8,325,759 System and method for carrying a wireless based signal over wiring 0 2008
8,175,649 Method and system for real time control of an active antenna over a distributed antenna system 0 2009
8,184,681 Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting 1 2010
 
FREESCALE SEMICONDUCTOR, INC. (5)
5,960,036 Apparatus and method for auto-configuring a communication system 30 1996
5,909,463 Single-chip software configurable transceiver for asymmetric communication system 100 1996
5,903,599 Transceiver and method for reporting state transitions in a communication system 9 1996
6,259,746 Method for allocating data and power in a discrete multi-tone communication system 24 1998
7,830,855 Method and apparatus for data allocation in an overlap-enabled communication system 0 2004
 
Telebit Corporation (5)
4,731,816 Ensemble modem structure for imperfect transmission media 269 1987
5,054,034 Ensemble modem structure for imperfect transmission media 117 1989
6,038,222 Modem command and data interface 5 1997
6,023,473 Application programming interface for modem and ISDN processing 10 1997
6,047,308 Modem with integrated control processor and digital signal processor sessions 6 1997
 
DAPHIMO CO. B.V., LLC (4)
6,549,520 Method and apparatus for varying power levels in a multicarrier modem 41 2000
6,778,596 Method and multi-carrier transceiver with stored application profiles for supporting multiple applications 31 2000
6,775,320 Method and a multi-carrier transceiver supporting dynamic switching between active application sets 21 2000
7,813,418 Method and a multi-carrier transceiver supporting dynamic switching between active application sets 4 2008
 
TQ DELTA, LLC (4)
5,636,246 Multicarrier transmission system 118 1994
5,832,030 Multi-carrier transmission system utilizing channels with different error rates 8 1996
6,748,016 System and method for transmitting messages between transceivers using electromagnetically coupled signals 4 2000
7,656,976 Systems and methods for multicarrier modulation using multi-tap frequency-domain equalizer and decision feedback 0 2007
 
AT&T INTELLECTUAL PROPERTY II, L.P. (3)
7,512,149 Bit and power allocation scheme for full-duplex transmission with echo cancellation in multicarrier-based modems 3 2003
8,160,180 Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space 0 2008
8,009,692 Bit and power allocation scheme for full-duplex transmission with echo cancellation in multicarrier-based modems 0 2009
 
QUALCOMM INCORPORATED (3)
7,688,899 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion 1 2001
7,649,954 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion 2 2006
8,040,965 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion 0 2009
 
AT&T INTELLECTUAL PROPERTY I, L.P. (2)
7,623,584 Multiuser allocation method for maximizing transmission capacity 0 2008
7,916,802 Multiuser allocation method for maximizing transmission capacity 0 2009
 
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY (2)
5,289,459 Duplex data transmission 28 1989
5,598,435 Digital modulation using QAM with multiple signal point constellations not equal to a power of two 74 1994
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (2)
7,453,947 Apparatus and method for adaptively modulating signal by using layered time-space detector used in mimo system 8 2003
RE44092 Apparatus and method for adaptively modulating signal by using layered time-space detector used in MIMO system 0 2010
 
ERICSSON INC. (2)
6,046,990 High-penetration transmission method for a radiocommunication system 19 1995
6,314,081 High power short message service using dedicated carrier frequency 7 1996
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
5,058,134 Process of synchronizing a receiving modem after a training on data 24 1989
5,268,938 Redundancy scheme for Fourier transform coding on peak limited channels 12 1992
 
UNIVERSITY OF IOWA RESEARCH FOUNDATION (2)
7,539,254 Method and system for optimal bitloading in communication and data compression systems 1 2005
8,238,457 Method and system for optimal bitloading in communication and data compression systems 0 2009
 
CIF LICENSING, LLC (1)
5,048,054 Line probing modem 104 1989
 
CISCO SYSTEMS, INC. (1)
5,867,666 Virtual interfaces with dynamic binding 77 1997
 
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION (1)
5,487,069 Wireless LAN 97 1993
 
DAIMLERCHRYSLER AG (1)
5,666,382 Method and apparatus for communicating in the presence of power and propulsion system interference 11 1994
 
DOBSON, KURT (1)
4,943,980 Multi-carrier high speed modem 73 1989
 
FUJITSU LIMITED (1)
5,226,081 Multi-carrier communication system using ciphered carrier bit assignment information 50 1991
 
HARRIS STRATEX NETWORKS CANADA, ULC (1)
5,640,417 QAM detector which compensates for received symbol distortion induced by a cellular base station 22 1995
 
INTEL CORPORATION (1)
7,345,989 Adaptive channelization scheme for high throughput multicarrier systems 1 2004
 
ITT MANUFACTURING ENTERPRISES, INC. (1)
6,252,878 Switched architecture access server 79 1997
 
LANTIQ DEUTSCHLAND GMBH (1)
6,522,666 Multicarrier communication with variable overhead rate 5 2000
 
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. (1)
8,014,326 Joint carrier allocation and time sharing for OFDMA/TDMA networks 0 2009
 
MOTOROLA MOBILITY LLC (1)
7,672,381 Method of multiple-carrier communication within a noncontiguous wideband spectrum and apparatus therefor 4 2000
 
MOTOROLA, INC. (1)
5,822,372 Multicarrier system using subchannel characteristics to implement different error rates within a data stream 57 1996
 
PANASONIC CORPORATION (1)
7,633,964 Communication apparatus, communication system and communication method 0 2005
 
PARADYNE CORPORATION (1)
7,916,776 Performance customization system and process for optimizing xDSL performance 0 2003
 
POLYTRAX INFORMATION TECHNOLOGY AKTIENGESELLSCHAFT (1)
6,956,906 Powerline data communication 14 2001
 
ROBERT BOSCH GMBH (1)
5,150,112 Interface for use between two communication units 0 1990
 
SAMSUNG ELECTRONICS CO., LTD. (1)
5,903,608 Adaptive bit swapping method and device for discrete multitone system 65 1997
 
SIEMENS AKTIENGESELLSCHAFT (1)
4,811,384 Method for level regulation of message information 1 1986
 
TELECOMMUNICATIONS RESEARCH LABORATORIES (1)
5,889,759 OFDM timing and frequency recovery system 95 1996
 
THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS (1)
6,400,773 Section division operating point determination method for multicarrier communication systems 13 1999
 
UNWIRED PLANET, LLC (1)
6,421,357 High-penetration radiocommunication system using a compact character set 5 1998
 
VERIZON BUSINESS GLOBAL LLC (1)
7,106,754 Application programming interface for modem and ISDN processing 0 2002