一种L型阵列的相干分步降维DOA估计方法  

DOA algorithm of reduced dimension for L-shaped array with coherent signal source

作　　者：张艳萍[1] 赵玉垒[1] 孙心宇[1] 

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

出　　处：《计算机应用研究》2016年第5期1477-1480,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61203273);江苏省高校自然科学研究重大资助项目(13KJA510001);江苏省普通高校研究生科研创新计划项目(CX10B_303Z);江苏省高校优势学科Ⅱ期建设工程资助项目

摘　　要：针对相干信号二维波达方向(direction of arrival,DOA)估计运算复杂度高的问题,提出了一种基于前后向空间平滑的分步降维MUSIC算法。该算法通过前后向空间平滑技术去相干,通过一维空间谱搜索得到一维入射角,最后通过最小二乘法得到二维入射角,进而得到相干信号的DOA。仿真实验表明,该方法可以实现对相干信号的二维DOA估计,且具有较好的DOA估计性能,同时降低了运算复杂度。According to the heavy computation complexity of two-dimensional DOA estimation for coherent signals,this paper proposed a fractional dimension reduction MUSIC algorithm MUSIC method based on the forward / backward spatial smoothing technique. Firstly this algorithm de-correlated the coherent signals through the forward / backward spatial smoothing technique,then one-dimensional spatial spectrum search was used to get a one-dimensional angle of incidence. Finally,the least square method obtained a two-dimensional angle of incidence and then obtained the DOA of coherent signals. Simulation results show that this method can be achieved on a two-dimensional DOA estimation of coherent signals and keeps a better DOA estimation performance. This algorithm also reduces the computational complexity.

关 键 词：相干 空间平滑技术 DOA估计 分步降维 

分 类 号：TN911.7[电子电信—通信与信息系统] TP301.6[电子电信—信息与通信工程]