Patent ID: 7236463
Filing Date: 2007-06-26
Classification: H04B

Abstract:
1. A transceiver for echo and near-end crosstalk cancellation in a digital data transmission system where the transceiver communicates over a communications channel, the transceiver comprising: a receiver for receiving a signal transmitted from the communication channel; a timing recovery circuit for generating a phase choosing signal according to the received signal; a same-channel phase interpolator for receiving a same-channel signal which will be transmitted from a same-channel transmitting end to the communication channel to generate a plurality of signals with a plurality of different phases, and the phase choosing signal to determine a specific phase from the different phases, the same-channel phase interpolator determining a same-channel phase-modified signal with the specific phase and outputting the same-channel phase-modified signal; an echo canceller for receiving the same-channel phase-modified signal to cancel an echo in the received signal; a near-channel phase interpolator for receiving a near-channel signal which will be transmitted from a near-channel transmitting end to the communication channel to generate a plurality of signals with a plurality of different phases, and the phase choosing signal to determine a specific phase from the different phases, the same-channel phase interpolator determining a near-channel phase-modified signal with the specific phase and outputting the near-channel phase-modified signal; and a near-end crosstalk canceller for receiving the near-channel phase-modified signal to cancel a near-end crosstalk signal in the received signal.