LOW-POWER MIXED-MODE ECHO/CROSSTALK CANCELLATION IN WIRELINE COMMUNICATIONS

摘要

A signal processing system (100) comprises an AGC and pre-echo cancellation system (102) for receiving an analog signal, boosting it up (over all frequencies) to a pre-determined range by AGC, and removing the immediate transmit pulse from this received signal by a pre-echo canceller to provide a second analog signal. The signal processing system (100) further comprises a summer (104) for receiving the second analog signal; a feed forward equalization (FEE) unit (106) for receiving a signal from the summer (104); and a slicer (108) for receiving a signal from the FEE unit (106) and providing an output signal. The signal processing system (100) also comprises an Echo and NEXT cancellation system (112) for receiving the output signal and for providing a signal to the summer (104) for canceling the echo and crosstalk in the signal processing system (100). Accordingly, in a system and method in accordance with the present invention, the echo and crosstalk components associated with a signal processing system (100) can be subtracted prior to the FFE unit (106).