基于凸优化的共形阵波束优化方法研究  

A Conformal Array Beam Optimization Algorithm Research Based on Convex Optimization

作　　者：王晓庆[1] 梁浩前 王大宇[1] 陈卫东[1] WANG Xiaoqing;LIANG Haoqian;WANG Dayu;CHEN Weidong(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2020年第8期683-689,共7页Radio Engineering

基　　金：国家自然科学基金资助项目(U19B2028)。

摘　　要：针对常规波束形成运用到共形阵列时旁瓣水平高的问题,通过分析实际共形阵列布阵和接收特性,将凸优化技术与陈列信号处理技术相结合,提出2种加权向量范数约束二阶锥规划(Second Order Cone)方法:一种是旁瓣最低主瓣最小加权CBF法;另一种是给定旁瓣级的高增益加权CBF法。仿真和外场试验结果表明,在主瓣保持不变情况下,该方法比Capon波束形成和其他方法压制的旁瓣级更低,而相同旁瓣级压制的情况下该方法阵增益更高。To solve the problem of high sidelobe level when conventional beamforming is applied in conformal array in underwater acoustic target detection,two beamforming approaches combining convex optimization and array signal processing are proposed for conformal array after studying the properties of the actual conformal array layout and signal receiving.The first one minimizes the sidelobe level while keeping the distortionless response in the direction of desired signal and maintaining the mainlobe width.The approach can obtain lower sidelobe level as compared with other adaptive-based low-sidelobe breamforming algorithms while keeping the same beamwidth.The second approach maximizes the array gain while keeping the mainlobe direction and controlling the maximum sidelobe level which is strictly guaranteed to be lower than a prescribed value.This approach can obtain higher array gain as compared with the adaptive-based low-sidelobe breamforming algorithms while keeping the same sidelobe level.The results of sea test and computer simulation demonstrate the superior performance of the proposed methods as compared with the existing adaptive-based algorithms.

关 键 词：水声 共形阵 波束形成 旁瓣控制 凸优化 

分 类 号：TN911.7[电子电信—通信与信息系统]