Flexible adaptive null broadening beamforming based on symmetric non-overlapping subarray

Yu Zhao; Liping Ren; Bin Yang; Jun Li

doi:10.1117/12.2631907

14 April 2022 Flexible adaptive null broadening beamforming based on symmetric non-overlapping subarray

Yu Zhao, Liping Ren, Bin Yang, Jun Li

Proceedings Volume 12178, International Conference on Signal Processing and Communication Technology (SPCT 2021); 1217803 (2022) https://doi.org/10.1117/12.2631907
Event: International Conference on Signal Processing and Communication Technology (SPCT 2021), 2021, Tianjin, China

Abstract

When the adaptive antenna array encounters motion interference, the interference may overflow the null position which leads to a sharp decline in the output performance. At present, most of the solutions are to widen the null to improve the fault-tolerance of interference incidence angle. This will consume more degrees of freedom of the antenna array. For the adaptive antenna array with large number of elements, although it can provide enough degrees of freedom, the computational complexity is very large. To solve the above problems, a flexible adaptive null broadening beamforming based on symmetric non-overlapping subarray is proposed in this paper. The proposed method has three main contributions. The first is to widen the null to suppress the motion interference. Secondly, the proposed method flexibly controls the wide null according to the actual needs to reduce the waste of degrees of freedom. Finally, subarray level adaptive beamforming is used to replace element level adaptive beamforming, so as to reduce the computational complexity of the method. Simulation results verify the high performance and effectiveness of the proposed method.

Citation Download Citation

Yu Zhao, Liping Ren, Bin Yang, and Jun Li "Flexible adaptive null broadening beamforming based on symmetric non-overlapping subarray", Proc. SPIE 12178, International Conference on Signal Processing and Communication Technology (SPCT 2021), 1217803 (14 April 2022); https://doi.org/10.1117/12.2631907

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