On diagonal loading for robust adaptive beamforming based on worst-case performance optimization

被引：11
|
作者：
Lin, Jing-ran [1 ]
Peng, Qi-cong [1 ]
Shao, Huai-zong [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Commun & Informat Engn, Chengdu 610054, Peoples R China
来源：
ETRI JOURNAL | 2007年 / 29卷 / 01期
关键词：
robust adaptive beamforming (RABF); optimal diagonal loading; worst-case performance optimization; performance analysis;
D O I：
10.4218/etrij.07.0105.0186
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Robust adaptive beamforming based on worst-case performance optimization is investigated in this paper. It improves robustness against steering vector mismatches by the approach of diagonal loading. A closed-form solution to optimal loading is derived after some approximations. Besides reducing the computational complexity, it shows how different factors affect the optimal loading. Based on this solution, a performance analysis of the beamformer is carried out. As a consequence, approximated closed-form expressions of the source-of-interest power estimation and the output signal-to-interference-plus-noise ratio are presented in order to predict its performance. Numerical examples show that the proposed closed-form expressions are very close to their actual values.
引用
收藏
页码：50 / 58
页数：9
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