采用Radon-Wigner变换的二维波达方向估计  

2-D Direction of Arrival Estimation Method Using Radon-Wigner Transform

作　　者：许建忠[1] 孙红伟[2] 孙业岐[1] 段平光[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002 [2]河北大学工商学院,保定071002

出　　处：《电子与信息学报》2012年第4期997-1001,共5页Journal of Electronics & Information Technology

摘　　要：针对宽带多线性调频信号2维波达方向(2-D DOA)估计精度低的问题,该文提出了一种基于Radon-Wigner变换(RWT)的2-D DOA估计方法。该方法利用RWT在多目标环境下能够有效抑制交叉项干扰和噪声,具有很好的时频汇聚性特点,通过峰值搜索确定目标个数并重构信号阵列,最后利用MUSIC空间谱分析方法实现了对多个LFM信号的2-D DOA估计。仿真实验表明,基于RWT的DOA估计方法能对非平稳信号进行有效的2-D DOA估计。According to the problem of two-dimension（2-D） Direction Of Arrival（DOA） estimation accuracy low for wideband Linear Frequency Modulation（LFM） signals,a method of 2-D DOA estimation based on Radon-Wigner Transform（RWT） is proposed.In this method,by using the excellent time-frequency concentration performance of RWT which can eliminate cross interference terms and noise effectively in the background of multiple sources firstly,the number of target is determined by peak researching,and the array signal is reconstructed.Finally the MUSIC spatial spectrum analysis algorithm is used to estimate the 2-D DOA of multiple LFM signals.The simulation results show that the method based on RWT can efficiently estimate 2-D DOA for non-stationary signals.

关 键 词：信号处理 线性调频信号 2维波达方向估计 Radon-Wigner变换(RWT) 

分 类 号：TN911.7[电子电信—通信与信息系统]