两种强干扰下弱信号的二维波达方向估计算法研究  

Two Direction-of-Arrival Estimation Algorithms Research for Week Signals in Presence of Strong Interference Signals

作　　者：王鼎[1] 张莉[1] 吴瑛[1] 

机构地区：[1]解放军信息工程大学信息工程学院,郑州450002

出　　处：《系统仿真学报》2009年第10期2866-2871,共6页Journal of System Simulation

摘　　要：当信号的功率相差较大时,常规的空间谱估计算法往往无法估计出微弱信号的来波方向(DOA)。针对此问题,该文基于矩形阵列,研究了两种强干扰下弱信号的二维DOA估计算法。首先将干扰阻塞(JJM)算法推广至二维DOA估计;然后给出了一种基于正交投影预变换的弱信号测向算法,并且分析了这两种测向算法的统一理论框架;最后通过计算机仿真给出了两种测向算法的性能。The classical spatial spectrum estimation algorithms will not be able to estimate the direction-of-arrival （DOA） for week signals when the power difference of impinging signals on the array is very large. In order to estimate the 2-D DOA for week signals, two DOA estimation algorithms for week signals in presence of strong interference signals were researched. Firstly, the jamming jam method （JJM） was extended to 2-D DOA estimation, then an improved algorithm was introduced based on orthogonal projection pre-transformation; the united theory frame for the two algorithms was analyzed; finally the computer simulation results show the DOA estimation performance of the two algorithms.

关 键 词：阵列 波达方向估计 干扰阻塞 正交投影预变换 

分 类 号：TN911.7[电子电信—通信与信息系统]