A novel method for partially adaptive broadband beamforming

Liu, W. and Weiss, Stephan and Hanzo, Lajos (2003) A novel method for partially adaptive broadband beamforming. Journal of VLSI Signal Processing, 33 (3). pp. 337-344. ISSN 0922-5773 (https://doi.org/10.1023/A:1022288116263)

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In this paper, a novel subband-selective generalized sidelobe canceller (GSC) for partially adaptive broadband beamforming is proposed. The blocking matrix of the GSC is constructed such that its columns constitute a series of bandpass filters, which select signals with specific angles of arrival and frequencies. This results in bandlimited spectra of the blocking matrix outputs, which is further exploited by a subband decomposition prior to running independent unconstrained adaptive filters in each non-redundant subband. We discuss the design of both the blocking matrix using a genetic algorithm for an efficient sum-of-power-of-two coefficient format and the filter bank for the subsequent subband decomposition. By these steps, the computational complexity of our subband-selective GSC is greatly reduced compared to other adaptive GSC schemes, while performance is comparable or even enhanced due to subband decorrelation, as simulations indicate.


Liu, W., Weiss, Stephan ORCID logoORCID: https://orcid.org/0000-0002-3486-7206 and Hanzo, Lajos;