Patent ID: 7515704

Claim:
A method for cancelling an echo signal in a bidirectional communications link comprising: computing step sizes using power spectral density function of an error signal and a power spectral density function of a far end signal using the equation: μ (n) ( j )=μ 1 [R XX (n) ( j )+ NR EE (n) ( j )] −1 wherein μ 1 is a value less than 1/N, N being a number of sub filters used in a partitioned block frequency domain adaptive filter (PBFDAF), n is a block index, R XX is the power spectral density function of the far end signal, R EE is the power spectral density function of the error signal, and j is an index to a frequency-bin; and applying the computed step sizes to the N sub filters in the PBFDAF to cancel an echo signal.