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

页码：50 / 58

页数：9