一种基于相干波束形成的零陷加宽算法  

A novel null broadening algorithm based on coherent interference beamforming

作　　者：张艳萍[1,2] 姚俊[1,2] 孙心宇[1,2] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044 [2]江苏省大气环境与装备技术协同创新中心,江苏南京210044

出　　处：《电子技术应用》2015年第10期150-153,共4页Application of Electronic Technique

基　　金：国家自然科学基金资助项目(61203273);2013年度江苏省高校自然科学研究重大资助项目(13KJA510001)

摘　　要：针对干扰信号和期望信号相干导致"干扰欠相消"以及由于干扰扰动而无法去除的问题,提出了一种基于前后向空间平滑的零陷加宽算法。该算法首先通过前后空间平滑方法去相干,并利用最佳下降的递推方法求得最优权矢量。再将此权矢量作为一个"标准"的输出权值,利用二次约束的方法加宽方向图的零陷范围。通过理论分析和实验仿真验证了算法的正确性和有效性。Considering that the coherent interference signal leads to ＂less interference elimination＂ and the interference can not be removed due to interference disturbance, this paper proposed a novel null broadening algorithm based on the forward/backward spatial smoothing technique. Firstly,this algorithm de-correlates the coherent signals through the forward/backward spatial smoothing technique, then recursive method of steepest descent is used to get the optimal weight vector. Finally, the weight vector is as a ＂standard＂ output weight vector and quadratic beam pattern constrains is used to widen the range of null. Through theoretical analysis and experimental simulations verify the correctness and effectiveness of the algorithm.

关 键 词：相干波束形成 空间平滑 零陷加宽 稳健性 

分 类 号：TN911[电子电信—通信与信息系统]