There are some problems such as no unique solution,large misalignment in stereophonic acoustic echo cancellation(SAEC) caused by high correlation between stereo signals.

• 针对立体声回波对消中左右两声道的回波具有强相关性而导致自适应滤波器解不唯一、失配大等一系列问题,提出一种新的基于频移变换的去相关非线性预处理方法。