Patent ID: 6683859
Filing Date: 2004-01-27
Classification: H04B,H04L

Abstract:
A method of canceling echo in a multicarrier transceiver system including a multicarrier transmitter that transmits signals and a multicarrier receiver that receives signals, the method comprising:obtaining a frequency domain receive signal R and a residual frequency domain echo component E; producing, from the receive signal R and the echo component E, a far end transmitted signal T added to an equalized residual frequency domain echo component EV; estimating the far end transmitted signal T; subtracting the estimated far end transmitted signal T from the produced far end transmitted signal T added to the equalized residual frequency domain echo component EV, to produce the equalized residual frequency domain echo component EV independent of the far end transmitted signal T; removing an equalizer function V from the equalized residual frequency domain echo component EV to obtain a residual frequency domain echo component Eâ€² for adaptively updating an estimated frequency domain echo signal XWâ€²; and repeating the steps for a plurality of the received signals.