Patent ID: 7349482
Filing Date: 2008-03-25
Classification: H04B,H04M

Abstract:
1. A method of training an echo canceller connected between a First in First out (FIFO) synchronizer of a transmitter and a time domain equalizer of a receiver in order to cancel signals transmitted by the transmitter and returned to the receiver, the method comprising the steps of: (a) controlling sample signals output by the transmitter so that a portion of the sample signals are changed and output, wherein controlling sample signals comprises changing and outputting a portion of the sample signals output by the FIFO synchronizer; (b) transmitting an initializing signal at the transmitter; and (c) calculating at least one coefficients and a delay time of the echo canceller based on the initializing signal returned to the receiver, wherein during the controlling step (a), one of two consecutive sample signals output by the FIFO synchronizer of the transmitter is user data and the other of the two consecutive sample signals is non-zero data.