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基于综合误差的对角负载稳健波束合成器曾 浩 张 雷 杨士中 刘 玲


摘 要:在稳健的波束合成器中,采用对角负载的校正方法能有效克服误差影响。与传统的对角负载稳健波束合成器相比,新算法一方面综合考虑多种误差影响,建立相应数学模型;另一方面,在求解最优对角负载值时,对协方差矩阵进行了预处理,消除了部分误差影响,从而使对角负载校正方法更加有效。计算机仿真证明了新算法的有效性。
  关键词:稳健波束合成器;对角负载;协方差矩阵
  中图分类号:TN911
  文献标志码:A
  
  文章编号:1001-3695(2010)02-0523-03
  doi:10.3969/j.issn.1001-3695.2010.02.033
  
  Diagonal loading robust beamformer based on miscellaneous errors
  
  ZENG Hao,ZHANG Lei,YANG Shi-zhong,LIU Ling
  
  (College of Communication Engineering, Chongqing University,Chongqing 400030,China)
  
  Abstract:In order to calibrate the array errors, diagonal loading is used in the robust beamformer. Compared with the traditional beamformer, the new algorithm outperformed in two sides. One was that all kinds of errors were considered with the correct math models. On the other hand, the covariance matrix was preprocessed before calculating the optimum diagonal loading factor, which could get rid of some errors and improve the performance of diagonal loading method. The error models, approaches of preprocessing and diagonal loading factor calculating were proposed. Furthermore, the simulations certify the virtue of the new algorithm.
  Key words:robust beamformer; diagonal loading; covariance matrix ......
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