Pulse or digital communications – Transceivers – Modems
Patent
1997-09-23
2000-06-06
Tse, Young T.
Pulse or digital communications
Transceivers
Modems
375221, 375285, 370249, 370523, 714748, H04B 138, H04B 1500
Patent
active
060728256
ABSTRACT:
A noncooperative feedback system is provided for a compensation system associated with, for example, a transmitter or codec, for enabling the compensation system to improve the accuracy of digital signals transmitted to a, digital network. The noncooperative feedback system is particularly suited for providing feedback to a compensation system for correcting distortion resulting from rob bit signaling (RBS), digital loss, or other types of digital signal degradation. The noncooperative feedback system includes a compensation selector in a transmitter (e.g., digital modem, analog modem, codec, etc.) that combines different compensations with frames of digital data by way of an addition mechanism to produce modified digital data frames. The transmitter is configured to transmit the modified digital data frames into the digital network. A receiver (e.g., digital modem, analog modem, etc.) is configured to receive the modified digital data frames from the digital network and to communicate retransmission requests to the transmitter via the digital network when the data is inadequate. The adequacy of the data may be determined via any suitable method, for example, analyzing the signal-to-noise ratio. The compensation selector in the transmitter is configured to receive the retransmission requests and to select and implement the compensation that yields a lowest error based upon the transmission requests.
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Method and Apparatus Compensating for Effects of Digital Loss Insertion In Signal Transmissions Between Modems, Application Serial No. 08/390,185; Filed Feb. 02, 1995.
Betts William Lewis
Souders Keith Alan
Paradyne Corporation
Tse Young T.
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