An Improved Implementation of Generalized Sidelobe Canceller Filter in Diffuse Noise Field

Algorithms, which used in the microphone array, are currently widely popular, especially the GSC algorithm. Compared with the single-channel algorithm model, GSC uses information of direction of arrival (DOA) of the original speech signal to increase the efficiency of noise suppression. However, in practical applications, there are many restrictions, such as the error of the actual direction, the error of sensitivity between microphones, which affects the output signal, causes speech distortion and performance degradation. In this paper, the author proposed a method, that uses a priori SNR to reduce the speech leakage in the reference signal, to improve the implementation of GSC algorithm in diffuse noise field. The above method has been tested, and its effectiveness has been proven. In the future, the author will continue to study different noise environmental conditions to further improve the efficiency of the above method.