宽带恒定束宽波束形成的主瓣干扰抑制算法  

A Method of Broadband Constant Beamwidth Beamforming with Main Lobe Interference Suppression

作　　者：李帅[1] 宁立跃 杨小鹏[1] 曾涛[1] 龙腾[1] Li Shuai Ning Liyue Yang Xiaopeng Zeng Tao Long Teng(Beijing Key Laboratory of Embedded Real-Time Information Processing Technology, Beijing Institute of Technology, Beijing 100051, China)

机构地区：[1]北京理工大学嵌入式实时信息处理技术北京市重点实验室,北京100081

出　　处：《航空兵器》2016年第6期21-24,共4页Aero Weaponry

基　　金：国家自然科学基金项目(61120106004;61225005);高等学校学科创新引智计划(B14010)

摘　　要：在宽带波束形成技术中,当系统存在主瓣干扰时,通常会导致主瓣畸变、副瓣电平抬高,波束性能严重下降。传统的宽带恒定束宽波束形成算法只能做到主瓣保形,不能有效抑制干扰。因此,提出一种有效抑制主瓣干扰的宽带恒定束宽波束形成算法。该算法构造分频段阻塞矩阵,在数据域实施干扰相消预处理;补偿预处理带来的信号包络误差,在各频段频率中心采用二阶锥规划方法实现宽带波束的恒定束宽设计。该算法在实现期望信号无失真接收的同时,能有效抑制主瓣干扰。应用计算机仿真验证了该算法的有效性。In broadband beamforming technology,the main lobe interference usually causes the distortion of main lobe and the heightening of side lobe level,and the performance of the beam is severely reduced. The conventional broadband constant beamwidth beamforming methods can only satisfy main lobe shapes preserving,but can not effectively suppress the interference. Therefore,a method of broadband constant beamwidth beamforming with main lobe interference suppression is proposed. In the proposed method,the blocking matrices of different frequency bands are constructed and the interference is cancelled in data domain. The signal envelope error caused by pretreatment is compensated and the secondorder cone programming（ SOCP） is adopted in different frequency bands to achieve constant beamwidth.This method can effectively suppress the main lobe interference while receiving the desired signal without any distortion,and its effectiveness is verified by computer simulations.

关 键 词：宽带波束形成 主瓣干扰 恒定束宽 阻塞矩阵 二阶锥规划 

分 类 号：TN911.7[电子电信—通信与信息系统]