基于时域数据块平滑的多径信号DOA估计算法  

DOA Estimation Algorithm of Multipath Signals Based on Temporal Data Block Smoothing

作　　者：张森[1] 陈永革[1] 郭艺夺[1] 程青[2] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]西京学院,陕西西安710071

出　　处：《雷达科学与技术》2010年第5期417-421,共5页Radar Science and Technology

基　　金：国家自然科学基金(No.60601016)

摘　　要：针对低空环境下多径信号DOA估计问题,提出了一种时域数据块平滑(TDBS)的多径信号DOA估计算法。该算法基于多径信号的衰落特性,采用数据块平滑的方法,减小了时域数据平滑(TS)算法解相干处理的运算量,不存在阵列孔径损失,不受阵列结构限制;另外,当信源的运动速度达到一定程度时,TDBS算法的统计性能要优于空间平滑算法。计算机仿真结果证明了TDBS算法理论的正确性和有效性。To solve the problem of DOA estimation for multipath signals in low-angle environment,an algorithm,which is called TDBS,is proposed in this paper.By using data block smoothing,the TDBS algo-rithm based on the declined character of multipath signals can reduce the computational complexity of TS.The proposed method does not suffer the reduction of the effective array aperture size and is not limited by the array configuration.In addition,the performance of the TDBS is better than the spatial smoothing method when the velocity of the source reach the certain degree.The correctness and effectiveness of the proposed method are verified by the computer simulation results.

关 键 词：DOA估计 多径信号 时域数据块平滑(TDBS) 空间平滑 

分 类 号：TN911.7[电子电信—通信与信息系统] TN957[电子电信—信息与通信工程]