Performance Study of NVL Technique Based Robust Uniform Concentric Circular Array Beamformer under Mismatch Condition

2020 IEEE Region 10 Symposium (TENSYMP) Pub Date : 2020-06-05 DOI:10.1109/TENSYMP50017.2020.9230711

Md. Farhamdur Reza, Md. Selim Hossain, M. Rashid

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Abstract

The performance of Uniform Concentric Circular Array (UCCA) by adopting robust technique is analyzed in this paper. The inter-element spacing and the interring spacing this UCCA structure is kept uniformly as half wavelength. UCCA is chosen because of its circular structure and it has the ability to scan the desired signal from 0° to 360°. If there is any mismatch between actual signal and steering directions, the performance of Minimum Variance Distortion-less Response (MVDR) will degrade will degrade. Different loading techniques can resolve the problem for mismatch and make the system robust enough to receive the anticipated signal in the presence of inequality between actual and steering direction. A New Variable Loading (NVL) based UCCA beamformer is proposed in this work and compared the performance with existing loading technique-based UCCA beamformers. It is observed that the proposed UCCA beamformer exhibits better interference attenuation capability and offers better robustness against mismatch compared to the existing beamformers. The performance of proposed NVL based beamformer is analyzed using MATLAB software.

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失配条件下基于NVL技术的鲁棒均匀同心圆阵波束形成器性能研究

本文对采用鲁棒技术的均匀同心圆阵(UCCA)的性能进行了分析。该UCCA结构的元间间距和元间间距均保持在半波长。之所以选择UCCA，是因为它具有圆形结构，并且能够在0°到360°范围内扫描所需的信号。如果实际信号与转向方向不匹配，则最小方差无失真响应(MVDR)的性能会下降。不同的加载技术可以解决不匹配问题，使系统具有足够的鲁棒性，能够在实际方向与转向方向不相等的情况下接收预期信号。提出了一种基于可变加载的UCCA波束形成器，并将其性能与现有的基于加载技术的UCCA波束形成器进行了比较。结果表明，与现有波束形成器相比，所提出的UCCA波束形成器具有更好的干扰衰减能力和对失配的鲁棒性。利用MATLAB软件对所提出的基于NVL的波束形成器进行了性能分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 IEEE Region 10 Symposium (TENSYMP)

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