Pulse or digital communications – Transceivers – Modems
Patent
1997-10-03
2000-08-08
Chin, Stephen
Pulse or digital communications
Transceivers
Modems
379 93, 379134, 379140, H04B 138
Patent
active
061012165
ABSTRACT:
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 processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit which includes a rapid retrain circuit. The rapid retrain circuit can retrain the digital subscriber line modem in less than 0.5 seconds.
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Haque Jamal
Henderson P. Michael
Ko Kenneth D.
Patravali Shrenik P.
Rodriguez Manuel I.
Chin Stephen
Ha Dac V.
Rockwell International Corporation
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