An Interference Null Widening Algorithm Based on U-V Domain Expansion of Steering Vector

In adaptive array beamforming, when the interference position changes rapidly, the antenna receiving platform vibrates and moves, or the update speed of adaptive weights is slow, the interference may move out of the null position and cannot be effectively cancelled, and then the conventional method...

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Bibliographic Details
Main Authors: Shi, Yimai, Zhu, Lidong, He, Ean, Shi, Wenjun, Zhang, Yong, He, Wen, Liu, Kun
Format: Conference Proceeding
Language:English
Subjects:
Adaptive arrays
Azimuth
beamforming
Computers
Couplings
covariance matrix taper
Heuristic algorithms
interference cancellation
null widening
Simulation
Vibrations
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Summary:In adaptive array beamforming, when the interference position changes rapidly, the antenna receiving platform vibrates and moves, or the update speed of adaptive weights is slow, the interference may move out of the null position and cannot be effectively cancelled, and then the conventional method may be completely invalid. Therefore, in this paper, we propose an interference null widening algorithm based on the U-V domain expansion of the steering vector of interference source. The algorithm solves the problem of coupling the pitch angle and the azimuth angle of the interference signal by adding the adjacent interference, introducing the covariance matrix taper method, and mapping the expansion of angle domain to the expansion of independent U-V domain. The simulation results show that the algorithm has a deep depth of null in the range of null widening, and can effectively improve the anti-interference ability of the system in dynamic environment.
ISSN:2768-0940
DOI:10.1109/ISNCC58260.2023.10323914