Microphone array beamformer with robust spatial and temporal responses

In the applications of microphone array, large steering direction error is often unavoidable because of the motion of target speaker. Although many robust beamformers possess robustness against arbitrary array steering vector (ASV) error within a presumed uncertainty set, facing a large steering direction error, their performance degrades significantly. Meanwhile, microphone array always request a controlled frequency response to target signal. In this paper, we present a new adaptive microphone array implemented in frequency domain with controlled mainlobe and frequency response. With the robust constraints on magnitude response, the proposed microphone array not only produces large controlled robust response region and robust frequency response, but also achieves high performance in SINR enhancement.