Patent ID: 9749475
Date: 2017-08-29
CPC Classifications: H04M

Claim:
1. A method for reducing distortion echo, comprising: performing K-path amplification to a downlink reference signal x(t) to obtain K-path preprocessed signals, where K is a positive integer; performing a pre-distortion process to the K-path preprocessed signals, respectively, to obtain K-path pre-distorted signals r performing a filtering process to the downlink reference signal x(t) and each of the K-path pre-distorted signals using a self-adaptive filter which corresponds to the downlink reference signal x(t) and the corresponding pre-distorted signal, to obtain (K+1) path filtering signals; calculating differences between a target signal d(t) and each of the (K+1) path filtering signals to obtain (K+1) path error signals; performing a minimum-value fusion process to the (K+1) path error signals to obtain a residual signal e(t); and outputting the residual signal e(t) as a final self-adaptive echo cancellation.