US Patent No: 5,479,447

Number of patents in Portfolio can not be more than 2000

Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines

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Abstract

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A method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines wherein the initial optimal transmission bandwidth is identified based on initial signal-to-noise ratio (SNR) estimates of the orthogonal carriers of the multicarrier system. Maximum data throughput, or system performance margin, is achieved by assigning the total amount of information, or number of bits, to be transmitted in each multicarrier symbol to particular carriers through an initial bit allocation procedure, which is possibly subject to variable target bit error rates among the carriers. A transmit power mask, of any shape and level, is imposed upon the system by an initial energy allocation procedure that limits the maximum amount of power to be transmitted in each of the several carriers. Lastly, run-time adaptivity is achieved by monitoring the mean-squared-errors (MSE) of the orthogonal carriers, and the transmission bandwidth, as well as the bit allocation within the multicarrier symbol, is caused to change in real-time corresponding to changes in the channel characteristics in order to maintain optimal system performance.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITYPALO ALTO, CA2918

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chow, Peter S Burbank, CA 4 1016
Cioffi, John M Atherton, CA 119 3263

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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6,404,763 System and method for communicating telecommunication information between network equipment and a plurality of local loop circuits 17 2000
7,675,900 System and method for interfacing between signaling protocols 5 2000
6,839,342 System and method for interfacing signaling information and voice traffic 8 2000
7,385,963 System and method for communicating telecommunication information from a telecommunication network to a broadband network 6 2000
7,184,427 System and method for communicating telecommunication information from a broadband network to a telecommunication network 7 2000
6,754,221 System and method for selecting a compression algorithm according to an available bandwidth 71 2001
7,149,182 System and method for providing lifeline telecommunication service 38 2001
6,526,046 System and method for communicating telecommunication information using asynchronous transfer mode 17 2001
6,996,134 System and method for reliably communicating telecommunication information 43 2001
7,245,583 System and method for providing lifeline telecommunication service to line-powered customer premises equipment 1 2001
7,170,854 System and method using switch fabric to support redundant network ports 6 2001
6,879,667 System and method for interfacing telephony voice signals with a broadband access network 17 2002
7,239,628 Line-powered network interface device 40 2002
7,738,449 Method and apparatus for providing voice signals to and from a telecommunications switch 1 2006
7,990,984 System and method for communicating telecommunication information between a broadband network and a telecommunication network 1 2007
 
CENTURYLINK INTELLECTUAL PROPERTY LLC (17)
8,743,703 System and method for tracking application resource usage 0 2007
8,619,600 System and method for establishing calls over a call path having best path metrics 0 2007
8,537,695 System and method for establishing a call being received by a trunk on a packet network 6 2007
8,531,954 System and method for handling reservation requests with a connection admission control engine 0 2007
8,407,765 System and method for restricting access to network performance information tables 13 2007
8,307,065 System and method for remotely controlling network operators 21 2007
8,374,090 System and method for routing data on a packet network 60 2010
8,687,614 System and method for adjusting radio frequency parameters 0 2010
8,619,596 System and method for using centralized network performance tables to manage network communications 1 2012
8,619,820 System and method for enabling communications over a number of packet networks 0 2012
8,509,082 System and method for load balancing network resources using a connection admission control engine 28 2012
8,570,872 System and method for selecting network ingress and egress 0 2012
8,520,603 System and method for monitoring and optimizing network performance to a wireless device 4 2012
8,743,700 System and method for provisioning resources of a packet network based on collected network performance information 0 2012
8,488,495 System and method for routing communications between packet networks based on real time pricing 0 2012
8,472,326 System and method for monitoring interlayer devices and optimizing network performance 0 2012
8,750,158 System and method for differentiated billing 0 2012
 
PANASONIC SYSTEMS NETWORKS CO., LTD. (17)
6,735,245 Activation of multiple XDSL modems with channel probe 41 1998
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 18 2000
6,694,470 Retransmission procedure and apparatus for handshaking protocol 23 2000
6,934,326 Activation of multiple xDSL modems with implicit channel probe 2 2002
6,768,772 Activation of multiple xDSL modems with implicit channel probe 6 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
 
TELLABS OPERATIONS, INC. (17)
6,118,758 Multi-point OFDM/DMT digital communications system including remote service unit with improved transmitter architecture 20 1996
6,285,654 Apparatus and method for symbol alignment in a multi-point OFDM or DMT digital communications system 34 1997
6,804,192 OFDM/DMT digital communications system including partial sequence symbol processing 14 1999
6,690,680 Communication system signal synchronization techniques 12 1999
6,912,194 Digital communication transmission techniques 10 2000
8,050,288 Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems 0 2001
7,616,553 Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system 9 2004
8,547,823 OFDM/DMT/ digital communications system including partial sequence symbol processing 0 2004
7,898,935 OFDM/DMT/digital communications system including partial sequence symbol processing 3 2007
7,613,102 Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system 8 2007
7,957,965 Communication system noise cancellation power signal calculation techniques 0 2008
7,916,801 Time-domain equalization for discrete multi-tone systems 1 2008
8,102,928 Spectrally constrained impulse shortening filter for a discrete multi-tone receiver 0 2008
8,139,471 Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system 1 2009
8,243,583 OFDM/DMT/digital communications system including partial sequence symbol processing 2 2011
8,315,299 Time-domain equalization for discrete multi-tone systems 0 2011
8,665,859 Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system 0 2012
 
ADAPTIX, INC. (15)
8,005,479 Method and apparatus for adaptive carrier allocation and power control in multi-carrier communication systems 10 2002
7,782,985 Automatic frequency offset compensation in a TDD wireless OFDM communication system 13 2007
8,040,855 Communication system using OFDM for one direction and DSSS for another direction 0 2007
7,715,358 OFDMA with adaptive subcarrier-cluster configuration and selective loading 12 2007
7,650,152 Multi-carrier communications with adaptive cluster configuration and switching 9 2007
7,489,934 OFDMA with adaptive subcarrier-cluster configuration and selective loading 11 2007
8,738,020 Multi-carrier communications with adaptive cluster configuration and switching 0 2009
7,933,244 Multi-carrier communications with group-based subcarrier allocation 10 2009
8,036,199 OFDMA with adaptive subcarrier-cluster configuration and selective loading 7 2010
8,743,717 Multi-carrier communications with adaptive cluster configuration and switching 0 2011
8,750,888 Method and apparatus for adaptive carrier allocation and power control in multi-carrier communication systems 0 2011
8,743,729 Multi-carrier communications with adaptive cluster configuration and switching 0 2012
8,760,992 Method and system for switching antenna and channel assignments in broadband wireless networks 0 2013
8,767,702 Multi-carrier communications with adaptive cluster configuration and switching 0 2013
8,750,238 Multi-carrier communications with adaptive cluster configuration and switching 0 2013
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (14)
6,704,317 Multi-carrier LAN modem server 43 1998
6,507,585 Multi-carrier LAN adapter device using frequency domain equalizer 36 1998
6,603,811 Low complexity frequency domain equalizer having fast re-lock 12 1998
6,377,683 Low complexity frequency domain echo canceller for DMT transceivers 45 1998
6,608,864 Method and apparatus for fault recovery in a decision feedback equalizer 17 1999
6,732,323 Method of selecting initialization parameters for multi-channel data communication with forward error correction 3 2000
7,131,038 Performance evaluation of multicarrier channels 5 2000
7,110,467 Performance evaluation of a G.dmt-compliant digital subscriber line system 5 2000
7,103,096 Performance evaluation of multicarrier channels with forward error correction and automatic retransmission request 4 2000
7,020,212 Method and system for a multiple dimensional adaptive frequency domain noise canceler for DMT transceivers 14 2001
6,718,493 Method and apparatus for selection of ARQ parameters and estimation of improved communications 2 2001
7,263,130 Method and apparatus for evaluating error control parameters of self-similar constellations 2 2001
6,891,887 Multi-carrier LAN adapter device using interpolative equalizer 14 2001
7,137,047 Method and apparatus for selection of ARQ parameters and estimation of improved communications 19 2004
 
REALTEK SEMICONDUCTOR CORP. (14)
6,252,900 Forward compatible and expandable high speed communications system and method of operation 31 1997
6,128,335 Software rate adaptable modem with forward compatible and expandable functionality and method of operation 14 1997
6,092,122 xDSL DMT modem using sub-channel selection to achieve scaleable data rate based on available signal processing resources 32 1997
6,073,179 Program for controlling DMT based modem using sub-channel selection to achieve scaleable data rate based on available signal processing resources 45 1997
6,065,060 Modular multiplicative data rate modem and method of operation 25 1997
6,442,195 Multiple low speed sigma-delta analog front ends for full implementation of high-speed data link protocol 43 1997
6,128,348 Method for configuring data and energy parameters in a multi-channel communications system 20 1997
6,094,459 Circuit for configuring data and energy parameters in a multi-channel communications system 26 1997
6,084,917 Circuit for configuring and dynamically adapting data and energy parameters in a multi-channel communications system 57 1997
6,075,821 Method of configuring and dynamically adapting data and energy parameters in a multi-channel communications system 60 1997
6,084,906 ADSL transceiver implemented with associated bit and energy loading integrated circuit 27 1997
6,279,022 System and method for detecting symbol boundary in multi-carrier transmission systems 32 1998
6,292,515 Dual mode bit and gain loading circuit and process 38 2000
6,222,888 Method and circuit for controlling setup of multichannel system 42 2000
 
ADAPTIVE SPECTRUM AND SIGNAL ALIGNMENT, INC. (13)
7,302,379 DSL system estimation and parameter recommendation 17 2004
7,558,315 Adaptive margin and band control in digital subscriber line (DSL) systems 4 2004
7,809,116 DSL system estimation including known DSL line scanning and bad splice detection capability 6 2005
7,593,458 FEXT determination system 7 2005
8,073,135 Binder identification 1 2006
7,852,952 DSL system loading and ordering 1 2006
7,688,884 Vectored DSL nesting 2 2006
7,924,736 DSL system estimation 3 2006
7,830,955 Adaptive margin and band control 0 2006
8,483,369 DSL system 0 2007
7,711,530 DSL system estimation and parameter recommendation 5 2007
8,031,761 Adaptive margin and band control 0 2010
8,761,348 DSL system training 0 2011
 
BROADCOM CORPORATION (12)
6,310,909 DSL rate adaptation 71 1999
6,879,640 Method, apparatus and system for high-speed transmission on fiber optic channel 7 2000
6,904,082 DSL rate adaptation 13 2001
6,980,601 Rate adaptation and parameter optimization for multi-band single carrier transmission 22 2001
7,609,757 DSL rate adaptation 1 2005
7,512,186 Rate adaptation and parameter optimization for multi-band single carrier transmission 0 2005
8,194,722 Various methods and apparatuses for impulse noise mitigation 1 2005
7,471,741 Method, apparatus and system for high-speed transmission on fiber optic channel 0 2006
7,729,452 Method, apparatus and system for high-speed transmission on fiber optic channel 0 2007
8,605,837 Adaptive frequency-domain reference noise canceller for multicarrier communications systems 0 2008
8,111,777 Method, apparatus and system for high-speed transmission on fiber optic channel 0 2009
8,472,533 Reduced-complexity common-mode noise cancellation system for DSL 0 2011
 
KAON SYSTEMS, INC. (12)
7,072,315 Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks 94 2000
6,870,808 Channel allocation in broadband orthogonal frequency-division multiple-access/space-division multiple-access networks 90 2000
6,947,748 OFDMA with adaptive subcarrier-cluster configuration and selective loading 92 2000
6,940,827 Communication system using OFDM for one direction and DSSS for another direction 90 2001
7,146,172 Multi-carrier communications with adaptive cluster configuration and switching 46 2001
6,904,283 Multi-carrier communications with group-based subcarrier allocation 113 2001
6,751,444 Method and apparatus for adaptive carrier allocation and power control in multi-carrier communication systems 120 2001
7,355,962 Multi-carrier communications with group-based subcarrier allocation 13 2005
7,454,212 OFDMA with adaptive subcarrier-cluster configuration and selective loading 11 2005
7,852,812 Communication system using OFDM for one direction and DSSS for another direction 0 2005
7,379,742 Multi-carrier communications with adaptive cluster configuration and switching 14 2006
7,573,850 Multi-carrier communications with group-based subcarrier allocation 12 2007
 
FREESCALE SEMICONDUCTOR, INC. (11)
5,852,633 Method for allocating data in a data communication system 54 1996
5,822,374 Method for fine gains adjustment in an ADSL communications system 105 1996
5,995,568 Method and apparatus for performing frame synchronization in an asymmetrical digital subscriber line (ADSL) system 40 1996
6,130,882 Method and apparatus for configuring a communication system 51 1997
6,122,247 Method for reallocating data in a discrete multi-tone communication system 41 1997
6,275,522 Method for allocating data and power in a discrete, multi-tone communication system 17 1998
6,259,746 Method for allocating data and power in a discrete multi-tone communication system 36 1998
5,966,054 Method and apparatus for providing a clocking signal 3 1998
6,047,025 Method and apparatus for equallization in an asymmetric digital aubscriber line communications system 17 1998
6,775,241 Method and apparatus for configuring a communication system 9 1999
7,830,855 Method and apparatus for data allocation in an overlap-enabled communication system 0 2004
 
IKANOS COMMUNICATIONS, INC. (10)
6,445,733 Method of and apparatus for performing line characterization in a non-idle mode in a subscriber line communication system 46 1998
6,430,219 Method of and apparatus for performing line characterization in a subscriber line communication system 28 1998
6,263,077 Digital subscriber line modem utilizing echo cancellation to reduce near-end cross-talk noise 28 1998
6,161,203 Communication system utilizing Reed-Solomon code to achieve auto frame synchronization acquistion 16 1998
6,252,902 xDSL modem having DMT symbol boundary detection 14 1999
6,233,276 XDSL modem having time domain filter for ISI mitigation 8 1999
7,076,010 Method and apparatus for time domain equalization in an XDSL modem 8 2001
7,486,608 Efficient implementation of low power mode in digital subscriber line (DSL) transceivers 4 2003
7,653,139 Bit-loading method and system for a DMT transceiver 3 2005
7,813,434 Systems and methods for improved bit loading for discrete multi-tone modulated multiple latency applications 0 2006
 
SAMSUNG ELECTRONICS CO., LTD. (9)
5,832,387 Adaptive power allocating method and apparatus for multicarrier transmission system 96 1995
5,903,608 Adaptive bit swapping method and device for discrete multitone system 76 1997
6,307,889 Method for fast initialization of multicarrier system and point-to-multipoint transfer of multicarrier signal in digital subscriber line 30 1998
7,274,743 Methods for minimizing setup time by optimizing bit allocation in multi-channel communication system 15 2003
7,706,460 QAM signal decoding 0 2004
8,125,946 Wireless network and mobile stations for implementing variable bandwidth service on demand 1 2004
7,492,701 Apparatus and method for controlling adaptive modulation and coding in an orthogonal frequency division multiplexing communication system 13 2004
7,680,198 Adaptive bit/power loading technique for a multicarrier communication system 1 2005
7,839,820 Mobile station and method for implementing variable bandwidth service on demand 0 2005
 
INTEL CORPORATION (8)
7,321,614 Apparatus and methods for communicating using symbol-modulated subcarriers 14 2003
7,213,197 Adaptive bit loading with low density parity check forward error correction 13 2003
7,333,556 System and method for selecting data rates to provide uniform bit loading of subcarriers of a multicarrier communication channel 61 2004
7,392,016 Data transmission rate control 6 2005
7,672,365 Apparatus and methods for communicating using symbol-modulated subcarriers 3 2007
8,045,449 OFDM receiver and methods for operating in high-throughput and increased range modes 1 2009
8,315,321 Method and mobile communication station for communicating OFDM symbols using two or more antennas 1 2009
8,730,894 Variable bandwidth OFDM receiver and methods for receiving OFDM signals of different bandwidths 0 2011
 
MEGAWAVE AUDIO LLC (6)
6,049,551 Method and apparatus for dynamic allocation of transmission bandwidth resources and for transmission of multiple audio signals with a video signal 60 1996
6,212,201 Method and apparatus for dynamic allocation of transmission bandwidth resources and for transmission of multiple audio signals with a video signal 27 1999
6,778,649 Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth 2 2002
8,284,774 Ethernet digital storage (EDS) card and satellite transmission system 1 2007
7,650,620 Method and apparatus for push and pull distribution of multimedia 11 2007
8,774,082 Ethernet digital storage (EDS) card and satellite transmission system 0 2012
 
GENERAL DYNAMICS GOVERNMENT SYSTEMS CORPORATION (5)
5,987,069 Method and apparatus for variably allocating upstream and downstream communication spectra 52 1996
6,167,095 Method and apparatus for variably allocating upstream and downstream communication spectra 38 1997
6,091,787 Symbol lock detector 2 1997
6,304,594 Interference detection and avoidance technique 57 1998
6,212,229 Adaptive pre-emphasis technique 35 1998
 
NEC CORPORATION (5)
6,574,282 Multi-carrier transmission system, transmission unit and transmission method 5 1999
6,510,184 Multi-carrier transmission system and method thereof 34 1999
6,434,201 Simply-constructed digital radio communication system capable of changing transmission capacity mode 5 1999
6,714,520 System, apparatus method for multi-carrier transmission 25 1999
7,991,070 Wavelength transmission system and method using 3-dimensional LDPC-coded modulation 2 2008
 
POSITRON ACCESS SOLUTIONS INC. (5)
7,469,025 Decision feedback transceiver for multichannel communication system 1 2003
7,415,086 Multi-channel communication system for multiple input, multiple output processing of an encoded signal 2 2003
7,315,592 Common mode noise cancellation 32 2004
7,471,732 Method and apparatus for training using variable transmit signal power levels 3 2004
8,326,906 Efficient multiple input multiple output signal processing method and apparatus 1 2008
 
RONDEL TECHNOLOGY FACILITY L.L.C. (5)
7,106,967 Optical packet switching apparatus and methods 16 2001
7,162,155 Optical packet switching apparatus and methods 7 2002
7,218,853 Optical packet switching apparatus and methods 0 2006
7,324,752 Optical packet switching apparatus and methods 1 2006
7,720,379 Optical packet switching apparatus and methods 1 2008
 
SONY DEUTSCHLAND GMBH (5)
7,386,072 Orthogonal frequency division multiplexing (OFDM) system with channel transfer function prediction 21 2003
7,633,848 Communication device for receiving and transmitting OFDM signals in a wireless communication system 3 2005
7,961,588 Communication device for receiving and transmitting OFDM signals in a wireless communication system 1 2009
7,957,258 Communication device for receiving and transmitting OFDM signals in a wireless communication system 0 2009
8,743,675 Communication device for receiving and transmitting OFDM signals in a wireless communication system 0 2011
 
ALCATEL (4)
6,351,473 Method to allocate data bits, multi-carrier transmitter and receiver using the method, and related allocation message generator 8 1998
6,246,725 Multi-carrier telecommunication system with power adaptation means 13 1998
6,917,795 Multi-carrier receiver with improved radio frequency interference canceling 1 2002
7,991,072 Multi-carrier modem transmitter with controlled transmit signal quality degradation for improving stability of operation 1 2005
 
AT&T CORP. (4)
6,144,695 Method and apparatus for reducing near-end crosstalk (NEXT) in discrete multi-tone modulator/demodulators 37 1997
6,711,121 Orthogonal code division multiplexing for twisted pair channels 13 1999
6,678,316 Method and apparatus for reducing near-end crosstalk (NEXT) in discrete multi-tone modulator/demodulators 5 2000
7,139,323 Multi-frequency data transmission channel power allocation 10 2002
 
AWARE, INC. (4)
7,773,666 Systems and methods for characterizing transmission lines using broadband signals in a multi-carrier DSL environment 6 2006
8,208,519 Systems and methods for characterizing transmission lines using broadband signals in a multi-carrier DSL environment 3 2010
8,559,489 Systems and methods for characterizing transmission lines using broadband signals in a multi-carrier DSL environment 1 2012
8,743,937 Systems and methods for characterizing transmission lines using broadband signals in a multi-carrier DSL environment 0 2013
 
INTELLECTUAL VENTURES II LLC (4)
8,718,179 Multicarrier communication with variable overhead rate 0 2006
8,718,163 Method for seamlessly changing power modes in an ADSL system 0 2012
8,767,698 Adaptive allocation for variable bandwidth multicarrier communication 0 2013
8,717,928 Splitterless multicarrier modem 0 2013
 
LANTIQ DEUTSCHLAND GMBH (4)
6,522,666 Multicarrier communication with variable overhead rate 5 2000
8,009,749 Method of transmission power control and communication device 2 2007
8,204,100 Methods and apparatuses for data transmission 0 2009
8,504,888 Communication devices and methods with online parameter change 0 2010
 
VIASAT, INC. (4)
7,215,650 Adaptive data rate control for narrowcast networks 7 2000
7,916,680 Adaptive data rate control for narrowcast networks 6 2007
8,208,864 Adaptive data rate control for narrowcast networks 0 2011
8,311,491 Adaptive data rate control for narrowcast networks 0 2012
 
WILLIAM MARSH RICE UNIVERSITY (4)
6,317,495 Spectral optimization and joint signaling techniques with multi-line separation for communication in the presence of crosstalk 53 1998
6,292,559 Spectral optimization and joint signaling techniques with upstream/downstream separation for communication in the presence of crosstalk 53 1998
6,839,429 Spectral optimization for communication under a peak frequency-domain power constraint 25 1999
7,035,400 Signaling Techniques in channels with asymmetric powers and capacities 10 2000
 
AMATI COMMUNICATIONS CORPORATION (3)
5,673,290 ADSL compatible discrete multi-tone apparatus 130 1995
6,064,692 Protocol for transceiver initialization 78 1997
6,249,543 Protocol for transceiver initialization 40 1999
 
AT&T INTELLECTUAL PROPERTY I, L.P. (3)
7,995,545 Wireless broadband service 0 2007
7,716,557 Method and system for adaptive interleaving 0 2008
7,716,558 Method and system for adaptive interleaving 0 2008
 
AT&T INTELLECTUAL PROPERTY II, L.P. (3)
7,570,706 Multi-frequency data transmission channel power allocation 0 2006
7,627,024 Multi-frequency data transmission channel power allocation 0 2006
7,936,841 Multi-frequency data transmission channel power allocation 0 2009
 
HARINGTON VALVE, LLC (3)
7,577,100 System and method for measuring signal to noise values in an adaptive wireless communication system 0 2002
7,177,275 Scheduling method and system for communication systems that offer multiple classes of service 12 2002
7,609,631 Scheduling method and system for communication systems that offer multiple classes of service 10 2007
 
HYBRID AUDIO LLC (3)
6,252,909 Multi-carrier transmission system utilizing channels of different bandwidth 20 1997
RE40281 Signal processing utilizing a tree-structured array 6 2004
RE42949 Stereophonic audio signal decompression switching to monaural audio signal 1 2007
 
INTRATECH, INC. (3)
6,532,256 Method and apparatus for signal transmission and reception 66 2001
6,735,264 Compensation for non-linear distortion in a modem receiver 14 2001
7,173,966 Compensation for non-linear distortion in a modem receiver 10 2004
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (3)
6,005,893 Reduced complexity bit allocation to subchannels in a multi-carrier, high speed data transmission system 82 1997
6,690,736 Bit allocation in a transmission system 7 2000
7,466,658 Receiver and method for decoding of truncated data 5 2003
 
YAHOO! INC. (3)
6,404,522 Optical communication method and system using wavelength division multiplexing 22 1998
6,574,018 Network control system for optical communication networks 24 1999
6,738,581 Network control system for optical communication networks 7 2003
 
ALCATEL N.V. (2)
5,809,030 Frequency division multiple access (FDMA) dedicated transmission system, transmitter and receiver used in such a transmission system 34 1996
5,812,599 Method for allocating data elements in multicarrier applications and equipment to perform this method 101 1996
 
ANALYTICAL GRAPHICS, INC. (2)
6,021,268 Method and apparatus for modeling receiver bandwidth for telecommunications analysis 18 1997
6,473,597 Method and apparatus for modeling transmitter bandwidth for telecommunications analysis 5 2000
 
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION (2)
6,778,517 Wireless broadband service 28 1999
8,149,802 Wireless broadband service 1 2007
 
CANON KABUSHIKI KAISHA (2)
6,487,614 Interface control system for exchanging signals by superposing signals to an existed signal line using low voltage differential signal 11 1998
7,039,120 Device and method for the dynamic allocation of frequencies for multicarrier modulation systems 19 1999
 
CONSTELLATION TECHNOLOGIES LLC (2)
6,236,726 Transmit power scaling for far-end crosstalk reduction 16 1998
6,885,696 Notifying bit allocation changes in a multicarrier modulation communications system 9 2000
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (2)
7,376,193 Method for adaptively allocating resources in communication system 3 2003
RE44352 Method for adaptively allocating resources in communication system 0 2010
 
GLOBALFOUNDRIES INC. (2)
6,229,818 Active isolation system and method for allowing local and remote data transfers across a common data link 60 1997
5,930,340 Device and method for isolating voice and data signals on a common carrier 167 1997
 
LSI LOGIC CORPORATION (2)
6,542,460 Relating to multidirectional communication systems 14 1998
6,430,148 Multidirectional communication systems 40 1998
 
LUCENT TECHNOLOGIES INC. (2)
6,810,030 Dynamic and smart spreading for wideband CDMA 23 1997
7,161,956 Adapative quality control loop for link rate adaptation in data packet communications 5 2001
 
MICROSEMI SEMICONDUCTOR (U.S.) INC. (2)
6,011,781 Multipoint access protocol utilizing a point-to-point methodology 34 1997
6,226,356 Method and apparatus for power regulation of digital data transmission 34 1998
 
MICROSOFT CORPORATION (2)
7,164,669 Multi-carrier communication with time division multiplexing and carrier-selective loading 55 2002
7,414,994 Multi-carrier communication with time division multiplexing and carrier-selective loading 1 2006
 
MOTOROLA MOBILITY LLC (2)
6,219,840 Method for assigning communication resources in a communication system 56 1996
7,016,401 Method and apparatus for automated correlation of digital modulation impairment 6 1999
 
MOTOROLA, INC. (2)
5,822,372 Multicarrier system using subchannel characteristics to implement different error rates within a data stream 68 1996
6,061,405 Time domain source matched multicarrier quadrature amplitude modulation (QAM) method and apparatus 20 1997
 
PANASONIC CORPORATION (2)
7,760,810 Receiver and method for digital multi carrier transmission 3 2004
8,724,708 Image decoding device, image decoding system, image decoding method, and integrated circuit 0 2008
 
ROCKSTAR CONSORTIUM US LP (2)
6,130,918 Method and apparatus for reducing the peak-to-average ratio in a multicarrier communication system 56 1997
6,466,586 Digital subscriber line framing structure supporting imbedded rate adaptive synchronous and asynchronous traffic 34 1998
 
RPX CORPORATION (2)
7,519,132 Reduced complexity multicarrier precoder 2 2006
8,175,188 Reduced complexity multicarrier precoder 0 2009
 
SILICON LABORATORIES INC. (2)
6,400,759 Device driver for rate adaptable modem with forward compatible and expandable functionality 15 1997
6,088,385 Flexible and scalable rate ADSL transceiver and system 25 1998
 
SONY CORPORATION (2)
6,400,679 Communication resource allocation method and apparatus 19 1997
5,970,047 Communications method, communication apparatus, reception method, and reception apparatus 12 1997
 
STARGUIDE DIGITAL NETWORKS (2)
7,792,068 Satellite receiver/router, system, and method of use 0 2003
7,372,824 Satellite receiver/router, system, and method of use 1 2003
 
STMICROELECTRONICS N.V. (2)
6,751,261 Synchronisation 12 1999
6,865,232 Multi-carrier transmission systems 34 1999
 
TQ DELTA, LLC (2)
6,748,016 System and method for transmitting messages between transceivers using electromagnetically coupled signals 5 2000
6,801,570 Intelligent rate option determination method applied to ADSL transceiver 15 2000
 
VECIMA NETWORKS INC. (2)
7,327,795 System and method for wireless communication systems 28 2003
7,327,800 System and method for data detection in wireless communication systems 55 2003
 
ACTELIS NETWORKS (ISRAEL) LTD. (1)
7,453,929 High speed access system over copper cable plant 7 2005
 
ACTELIS NETWORKS INC. (1)
7,133,441 High speed access system over copper cable plant 42 2000
 
ASSIA, Inc. (1)
8,009,665 DSL system 3 2006
 
AT&T BLS INTELLECTUAL PROPERTY, INC. (1)
7,292,560 Wireless broadband service 3 2004
 
AVIAT U.S., INC. (1)
8,630,600 Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment 0 2012
 
BELL CANADA (1)
6,456,657 Frequency division multiplexed transmission of sub-band signals 18 1999
 
BOCKSTAR TECHNOLOGIES LLC (1)
6,693,957 Adaptive front end for discrete multitone modem 5 1998
 
CIENA CORPORATION (1)
6,459,832 Method and apparatus for optical signal transmission using multiple sub-signals of non-uniform bandwidth 3 2000
 
COMCAST CABLE COMMUNICATIONS, LLC (1)
6,181,714 Multi-carrier transmission systems 63 1999
 
DATA JCE LTD (1)
7,443,917 Method and system for transmission of information data over a communication line 4 2004
 
DORAN HANDELMAN (1)
6,763,191 Optical switching apparatus and methods 20 2000
 
DORON HANDELMAN (1)
7,181,139 Optical switching apparatus and methods 6 2001
 
E-CELL TECHNOLOGIES (1)
6,477,595 Scalable DSL access multiplexer with high reliability 94 2000
 
FRANCE TELECOM (1)
7,864,728 Method of allocating subbands to streams of a multichannel link in a multicarrier modulation communications system 0 2006
 
FUJITSU LIMITED (1)
6,735,244 Data transmission system and receiver unit thereof 39 2000
 
FUTUREWEI TECHNOLOGIES, INC. (1)
8,442,131 Power reduction for digital subscriber line 0 2009
 
GENERAL INSTRUMENT CORPORATION (1)
6,389,068 Sliced bandwidth distortion prediction 18 2000
 
HALLIBURTON ENERGY SERVICES, INC. (1)
6,657,551 Downhole telemetry system having discrete multi-tone modulation and dynamic bandwidth allocation 15 2001
 
INTEL MOBILE COMMUNICATIONS GMBH (1)
7,409,008 Transmitting arrangement for mobile radio 0 2004
 
INTELLECTUAL VENTURES I LLC (1)
7,103,112 Transmit frequency domain equalizer 4 2001
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
5,666,383 Variable rate discrete multiple tone bidirectional transmission 11 1996
 
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