基于子带SDL的LCMV宽带波束形成性能分析  

Performance Analysis of LCMV Wideband Beamforming With Sensor Delay Lines in Subbands

作　　者：赵拥军[1] 陈晖[1,2] 

机构地区：[1]解放军信息工程大学导航与空天目标工程学院,郑州450002 [2]国防大学公共平台中心,北京100091

出　　处：《数据采集与处理》2015年第4期774-785,共12页Journal of Data Acquisition and Processing

基　　金：国家高技术研究发展计划("八六三"计划)(2011AA7031015)资助项目

摘　　要：对子带阵元延迟线(SDL)波束形成器的线性约束最小方差(LCMV)宽带自适应波束形成算法进行了性能分析。推导了子带LCMV算法的输出信干噪比(SINR)的解析表达式,对比了子带LCMV算法和全带LCMV算法的阵列响应性能,以及阵元数量、输入信噪比(SNR)和阵元间距对输出SINR的影响,并分析了子带滤波器组的参数对子带LCMV输出SINR性能的影响。仿真结果表明子带LCMV算法可有效提高性能,并可在不降低性能的条件下降低阵元需求。Subband sensor delay lines（SDL）performance based on linearly constrained minimum variance（LCMV）adaptive wideband beamforming algorithm is analyzed.The output signal-to-interference-plusnoise ratio（SINR）of subband LCMV algorithm is derived.The performance of fullband LCMV beamforming and subband LCMV beamforming is compared,including array response and output SINR with different number of elements,input signal-to-noise ratio（SNR）,and element spacing.Output SINR performance of subband LCMV beamforming with different parameters of subband filter banks is also analyzed.Simulation results verify that the subband LCMV algorithm improves its performace and reduces the element need at no cost of performance.

关 键 词：宽带波束形成 阵元延迟线 子带滤波器组 线性约束最小方差 

分 类 号：TN911.7[电子电信—通信与信息系统]