一种基于阵列接收信号重排的单快拍DOA估计方法  

Single Snapshot DOA Estimation Method Based on Rearrangement of Array Receiving Signal

作　　者：蒋柏峰[1,2] 吕晓德[1] 向茂生[1] 

机构地区：[1]中国科学院电子学研究所微波成像技术国家级重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《电子与信息学报》2014年第6期1334-1339,共6页Journal of Electronics & Information Technology

摘　　要：针对单快拍情况下大多数空间谱估计方法失效的问题,该文提出一种直接利用阵列接收信号重排构造伪协方差矩阵的模型。理论分析表明,该模型更加灵活且更具一般性,已有的伪协方差矩阵构造方法可以统一在该模型下。在此基础上结合波束形成的思想,进一步提出一种基于阵列接收信号加权求和的伪协方差矩阵构造方法,该方法综合考虑了信噪比及阵列自由度两方面因素的影响,可在一定程度上提升估计性能。理论分析和仿真验证说明了该方法及模型的正确性和有效性。Most of spatial spectrum estimation methods fail when there is only one valid snapshot. To deal with this issue, a pseudo covariance matrix construction model utilizing array receiving signal is proposed. Theoretical analysis shows that the presented model, which consists in the existing methods, is more flexible and general. Combining with beam forming idea, a method based on weighted summarizing is proposed, which considers both the affections of signal-to-noise ratio and array freedom. Estimation performance can be enhanced in some degree. Theoretical analysis and simulation results verify the correctness and effectiveness of the proposed method and model.

关 键 词：阵列信号处理 DOA估计 单快拍 伪协方差矩阵 

分 类 号：TN911.7[电子电信—通信与信息系统]