改进的基于压缩感知的自适应波束形成算法  

Improved adaptive beamforming algorithm based on compressed sensing

作　　者：王建[1] 王松[2] 丁其洪[1] 樊书辰 江锋 张宏伟 Wang Jian;Wang Song;Ding Qihong;Fan Shuchen;Jiang Feng;Zhang Hongwei(No.8511 Research Institute of CASIC,Nanjing 210007,Jiangsu,China;Unit 32086 of PLA,Nanjing 210018,Jiangsu,China)

机构地区：[1]中国航天科工集团8511研究所,江苏南京210007 [2]中国人民解放军32086部队,江苏南京210018

出　　处：《航天电子对抗》2022年第5期18-21,45,共5页Aerospace Electronic Warfare

摘　　要：基于快拍处理的压缩感知信号恢复计算量巨大。联合正交匹配追踪(J‑OMP)算法中每个快拍都要从过完备的原子库中依次寻找原子,然后将测量信号投影到选定的原子空间上,直至残差足够小;而且,当信号与预先设计的原子库中的原子存在偏差且偏差较大时,信号的恢复误差也会较大。针对这些问题,提出了改进的基于多快拍的自适应栅格调整的优化算法来进行信号重构,该算法在恢复效果与计算量上都有了较大的改进。The amount of calculation of signal recovery based on compressed sensing with snapshot process‑ing is great.The joint orthogonal matching pursuit(J-OMP)algorithm for each snapshot needs to search the most matched atom from the overcomplete dictionary,and projects the measurement signal to the selected atom space,until the residual is small enough.Moreover,when the selected atom from the overcomplete dictionary does not match the signal very well,the signal recovery error will be large.To solve these problems,an improved optimi‑zation algorithm for signal recovery based on adaptive grid adjustment with multiple snapshots is proposed.The recovery effect and the amount of calculation of this algorithm is greatly improved.

关 键 词：泰勒展开 压缩感知 数字波束形成 稀布阵 

分 类 号：TN971.1[电子电信—信号与信息处理]