D. L. Alon and B. Rafaely (Ben-Gurion University of the Negev)
IEEE Transactions on Audio, Speech and Language Processing, vol. 24, no. 1, p. 196-210. January 2016.
This is achieved by modeling the expected aliasing pattern in a maximum-directivity beamformer design, leading to a higher directivity index at frequencies previously considered to be out of the operating bandwidth, thereby extending the microphone array frequency range of operation. Aliasing cancellation is then extended to other beamformers. A simulation example with a 32-element spherical microphone array illustrates the performance of the proposed method. An experimental example validates the theoretical results in practice.
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