基于协方差矩阵重构的布谷鸟搜索DOA估计方法  

Cuckoo search DOA estimation method based on covariance matrix reconstruction

作　　者：李鹏[1,2,3] 张伟 夏翔[1,3] 马味敏 LI Peng;ZHANG Wei;XIA Xiang;MA Weimin(Jiangsu Key Laboratory of Meteorological Observation and Information Processing,Nanjing University of Information Science and Technology,Nanjing 210044,China;Binjiang College of Nanjing University of Information Science and Technology,Wuxi 214105,China;Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学江苏省气象探测与信息处理重点实验室,江苏南京210044 [2]南京信息工程大学滨江学院,江苏无锡214105 [3]南京信息工程大学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：《现代电子技术》2021年第7期66-72,共7页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(41075115);江苏省第11批六大高峰人才项目(2014-XXRJ-006);江苏省重点研发计划社会发展项目(BE201569);社会发展科技示范工程资助项目(N20191008)。

摘　　要：针对二维平面阵列传感器的目标波达方向(DOA)估计方法准确性不高的问题,提出一种基于协方差矩阵重构的布谷鸟搜索DOA估计方法。首先对目标信号的协方差矩阵进行重构,由范德蒙分解定理建立迹最小化问题,通过改进后的隔离小生境布谷鸟搜索算法求解出迹最小化问题在空间内的多个最优解,最终得到准确的DOA估计值。仿真结果表明,所提出方法进一步提高了对多个目标进行DOA估计的准确性,具有更好的均方根误差(RMSE)性能以及对相邻目标的分辨能力,并且对于信号环境的适应能力有所提升。In view of the low accuracy of direction of arrival(DOA)estimation method for two-dimensional planar array sensors,a Cuckoo search DOA estimation method based on covariance matrix reconstruction approach(CMRA)is proposed.The covariance matrix for the target signals is reconstructed first,and then the trace minimization problem is established by Vandermonde decomposition theorem.The improved isolated ecological niche Cuckoo search algorithm is used to solve the multiple optimal solutions of the trace minimization problem in space and get the accurate DOA estimated value finally.The simulation results show that the proposed method further improves the accuracy of DOA estimation for multiple targets,has better root mean square error(RMSE)performance and the resolution ability for adjacent targets,and improves the adaptability for signal environment.

关 键 词：DOA估计 布谷鸟搜索 协方差矩阵重构 迹最小化问题 隔离小生境 相邻目标分辨 

分 类 号：TN911.7-34[电子电信—通信与信息系统]