So acoustic echo cancellation (AEC) technique has become a hot issue of competition in the famous communication company all over the world.

因此，回波消除技术也就成为世界各大通讯公司竞争的热点技术之一。

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Multi channel acoustic echo cancellation (AEC) systems suffer from the non uniqueness problem of the adaptive identification solution because of the correlation of the input signals.

多路回波消除问题的本质难点是由于多路输入信号之间的强相关性而导致的自适应滤波器解不唯一的问题。

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