1
William L Betts, Edward S Zuranski: Secondary channel for digital modems using spread spectrum subliminal induced modulation. Paradyne Corporation, Kane Dalsimer Sullivan Kurcz Levy Eisele and Richard, March 7, 1989: US04811357 (132 worldwide citation)

A system and method are provided for use of a secondary channel in high speed (greater than 2400 bits per second) wire line modems to provide low speed (around 110 bits per second) non-interfering communications for control or monitoring functions. The secondary channel is used to monitor, configure ...


2
Edward S Zuranski, Kenneth D Ko, Jamal Haque, Shrenik P Patravali, Manuel I Rodriguez, Keith A Souders, Anthony A Tzouris: Communication system utilizing Reed-Solomon code to achieve auto frame synchronization acquistion. Conexant Systems, Foley & Lardner, December 12, 2000: US06161203 (88 worldwide citation)

A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing is utilized to adapt to varying subscriber line conditions coming from POTS telephone equipment. The digital subscriber line mode ...


3
Kenneth D Ko, David O Anderton, Ismail I Eldumiati, Steven A Gronemeyer, Don L Harmer, P Michael Henderson, Joel D Peshkin, Raphael Rahamim, Frederic M Stubbe, John S Walley, Kenneth S Walley, Yongbing Wan, Edward S Zuranski, Jamal Haque, Anthony A Tzouris, Shrenik P Patravali, Ganning Yang: Constant envelope modulation for splitterless DSL transmission. Conexant Systems, Foley & Lardner, April 3, 2001: US06212227 (88 worldwide citation)

A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the ...


4
Edward S Zuranski, Kenneth D Ko, Jamal Haque, Shrenik P Patravali, Manuel I Rodriguez, Keith A Souders, Anthony A Tzouris: Method of and apparatus for performing line characterization in a non-idle mode in a subscriber line communication system. Conexant Systems, Foley & Lardner, September 3, 2002: US06445733 (41 worldwide citation)

A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal p ...


5
William L Betts, Edward S Zuranski: Signal point interleaving technique. AT&T Bell Laboratories, Ronald D Slusky, Gerard A deBlasi, September 7, 1993: US05243627 (35 worldwide citation)

Viterbi decoder performance in a data communication system using 2N-dimensional channel symbols N>1 can be further enhanced by an interleaving technique which uses a distributed trellis encoder in combination with a signal point interleaver.


6
William L Betts, Edward S Zuranski: Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel. AT&T, Christopher N Malvone, March 7, 1995: US05396519 (34 worldwide citation)

The relative amounts of additive white noise and proportional noise in a communication channel are compensated for by providing adaptive precoding and preemphasis to signal point signals. The amounts of precoding and preemphasis are controlled using scalars to modify the magnitudes of the precoding ...


7
P Michael Henderson, Kenneth D Ko, Edward S Zuranski, Jamal Haque, Shrenik P Patravali, Manuel I Rodriguez, Keith A Souders, Anthony A Tzouris: Splitterless digital subscriber line communication system. Rockwell International Corporation, August 8, 2000: US06101216 (29 worldwide citation)

A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal proces ...


8
William L Betts, Edward S Zuranski: Automatic gain control using the extreme points of a constellation. Paradyne Corporation, Kane Dalsimer Sullivan Kurucz, July 28, 1987: US04683578 (29 worldwide citation)

A phase and gain corrector is described for a modem for receiving QAM or PSK-encoded signals. An ideal vector corresponding to the received vector is generated and the difference or error vector is resolved into a radial component in the direction of the ideal vector a tangential component. A gain c ...


9
William L Betts, Edward S Zuranski: System for channel capacity modulation. AT&T, Samuel R Williamson, December 12, 1995: US05475711 (28 worldwide citation)

A method and apparatus for optimizing parameters selectable by an analog modem for operation on any bandwidth-constrained channel is provided. Through the addition of circuitry for performing an optimization process, the modem is configured for identifying the optimum bandwidth and maximum data rate ...


10
Kenneth D Ko, David O Anderton, Ismail I Eldumiati, Steven A Gronemeyer, Don L Harmer, P Michael Henderson, Joel D Peshkin, Raphael Rahamim, Frederic M Stubbe, John S Walley, Kenneth S Walley, Yongbing Wan, Edward S Zuranski, Jamal Haque, Anthony A Tzouris, Shrenik P Patravali, Ganning Yang: Modulation switching for DSL signal transmission. Conexant Systems, Foley & Lardner, November 21, 2000: US06151335 (25 worldwide citation)

A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the DSL ...