摘要
针对现有波束形成零陷展宽方法在阵列流型误差情况下性能严重下降的问题,提出了一种抗阵列流型误差的零陷展宽方法。该方法首先利用不确定集优化方法,对预定区域内的干扰导向矢量进行校正,再结合协方差矩阵锐化技术构造一个零陷展宽投影矩阵,对采样协方差矩阵做投影处理,最后用投影处理后的协方差矩阵进行波束形成。仿真结果表明:所提方法在阵列流型误差的情况下,与现有波束形成零陷展宽方法相比具有更好的零陷展宽效果和输出性能,且计算复杂度很低,是一种先进的稳健波束形成零陷展宽方法。
To address the serious degradation of the performance of existing null broadening beamforming when array calibration errors exist, a null broadening beamforming method against array calibration errors was proposed. In the method, uncertain quadratic optimization was utilized to correct the steering vectors of interferences in the predetermined area. Covariance matrix taper technology was then combined to construct a null broadening projection matrix, which was used to implement projection processing for the sampling covariance. Finally, the covariance matrix that experienced projection processing was used for beamforming. In case of array calibration errors, the proposed method presented better effect and output performances than the present null broadening beamforming method. Moreover, the computational complexity of the proposed method is low. The proposed technique is an advanced and robust null broadening beamforming method.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第1期163-168,共6页
Journal of Harbin Engineering University
基金
国家部委基金项目(4010403020102
4010103020103)
关键词
自适应波束形成
零陷展宽
阵列流型误差
投影变换
协方差矩阵锐化
adaptive beamforming
null broadening
array calibration error
projection transform
covariance matrix taper
