相控阵的两级子阵级加权方法研究  

Two-stage subarray level weighting approach for phased array

作　　者：胡航[1] 王泽勋[1] 刘伟会[1] 朱淮城 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001 [2]毫米波/亚毫米波末制导技术国防科技重点实验室,北京100854

出　　处：《电波科学学报》2009年第6期1038-1043,共6页Chinese Journal of Radio Science

基　　金：中国博士后科学基金资助项目(20080430905);中国博士后科学基金特别资助项目(200902412);航空科学基金资助项目(20092077010);航天支撑基金项目

摘　　要：研究相控阵雷达的两级子阵级加权方法。其中第1级子阵级加权用于抑制差波束旁瓣,与Bayliss加权相比,降低了硬件成本与复杂度。第2级子阵级加权用于对和、差波束进行自适应干扰抑制。给出基于修正导向向量的方法,可有效抑制自适应方向图的旁瓣;且具有实现简单的优点,与基于预处理的方法相比有效降低了运算代价。采用修正导向向量与最优波束形成器的结合方法,提高了旁瓣抑制的灵活性;可在较好抑制旁瓣的同时,得到与最优波束形成器非常接近的SINR。仿真结果证明了所提出方法的有效性。The two-stage subarray level weighting approach of phased array radar is investigated. The fist stage weighting is used to suppress sidelobe of difference pattern and it reduces hardware cost and complexity compared with the Bayliss weighting. The second stage weighting is used to realize adaptation of the sum and difference beam. The approach based on modified steering vector is proposed. It suppresses sidelobe of adaptive patterns effectively and can be easily realized. The combined approach of modified steering vector and optimum beamformer is presented, which improves the flexibility of sidelobe suppression. It can suppress sidelobe effectively, meanwhile preserve output SINR quite approximating to that of optimum beamformer. Simulation results demonstrate the validity of the proposed approach.

关 键 词：子阵级相控阵 子阵级加权 旁瓣抑制 和 差波束 自适应方向图 

分 类 号：TN957.51[电子电信—信号与信息处理] TN911.7[电子电信—信息与通信工程]