Vol. 105

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2022-08-01

Projection Constraint Null Broadening and Deepening Method for Conjugate Array

By Shi-Jing Xiao, Bin Li, and Qing Wang
Progress In Electromagnetics Research Letters, Vol. 105, 121-129, 2022
doi:10.2528/PIERL22051103

Abstract

The performance of the Capon beamforming sharply decreases against strong directional and large deviation interference. In order to reduce the impact of the abnormal interference, this paper proposes a large degree of freedom null broadening beamforming for non-circular signals. The signal vector is first extended by a uniform linear conjugate array. The covariance matrix of the array is then reconstructed by projection transformation and diagonal loading technique. Finally, the beamforming is constrained by the characteristic subspace of the guide vector matrix, and the analytic expression of the optimal weights of the method is derived. The numerical simulations demonstrate that the proposed null broadening method has the advantages of high degrees of freedom and strong parameter selection robustness.

Citation


Shi-Jing Xiao, Bin Li, and Qing Wang, "Projection Constraint Null Broadening and Deepening Method for Conjugate Array," Progress In Electromagnetics Research Letters, Vol. 105, 121-129, 2022.
doi:10.2528/PIERL22051103
http://jpier.org/PIERL/pier.php?paper=22051103

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