Adaptive microphone array based on pause detection

Abstract

In this paper the performance of generalized sidelobe canceller (GSC) in room with reverberation is analyzed. GSC is inefficient in interference suppression when there is any correlation between interference and desired signal. The reason for this is unwanted cancellation of desired signal. It was shown that cancellation of the desired signal is proportional to the correlation between the direct wave of desired signal and its reflections. There is no cancellation if the GSC weightings are estimated in pauses of desired signal. Using these facts, a new algorithm based on pause detection was proposed. Simulations prove the advantage of proposed algorithm.