SYSTEM AND METHOD FOR HIGH-SPEED DECODING AND ISI COMPENSATION IN A MULTI-PAIR TRANSCEIVER SYSTEM
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Abstract
A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter'"'"'s partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel. First stage ISI compensation is performed in an inverse response filter having a characteristic feedback gain factor K, during system start-up. Second stage ISI compensation is performed by a single DFE in combination with a MDFE operating on tentative decisions output from a Viterbi decoder. As the DFE of the second stage reaches convergence, the feedback gain factor K of the first stage is ramped to zero.
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Citations
48 Claims
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1-28. -28. (canceled)
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29. A receiver for demodulating an analog signal transmitted by a remote transmitter over a transmission channel, the receiver comprising:
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an analog front end, including an analog-to-digital converter, the analog front end receiving and converting the analog signal to a digital signal; an adaptive receive filter for reducing a first interference component in the first digital signal and outputting a second digital signal, wherein the impulse response of the adaptive receive filter is initialized according to the impulse response of a transmit filter in the remote transmitter; an interference canceller for reducing a second interference component in the second digital signal and outputting a third digital signal, wherein the second interference component comprises a signal intended for another receiver; and a decoder for decoding the third digital signal. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for demodulating an analog signal transmitted by a remote transmitter over a transmission channel, the method comprising:
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(a) receiving the analog signal in an analog front end; (b) converting the analog signal to a first digital signal; (c) compensating for a first interference component included in the first digital signal using an adaptive filter to produce a second digital signal, wherein the impulse response of the adaptive filter is initialized according to the impulse response of a transmit filter in the remote transmitter; (d) compensating for a second interference component included in the second digital signal to produce a third digital signal, wherein the second interference component comprises a signal intended for another receiver; and (e) decoding the third digital signal. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification