一种双L型阵列DOA估计参量的精确配对方法  

Double L-shape 2-D DOA estimation with accuracy pairing method

作　　者：孙心宇[1] 周建江[1] 汪飞[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,江苏南京210016

出　　处：《系统工程与电子技术》2010年第6期1125-1130,共6页Systems Engineering and Electronics

基　　金：国防基础研究(P0620-041);江苏省六大人才高峰计划A类(P0952-041)资助课题

摘　　要：针对配对算法中可能出现的配对错误及运算量较大的问题,提出一种基于双L型阵列的三角函数配对法。首先用一维波达方向(direction of arrival,DOA)算法得到由仰角和方位角三角函数组成的向量,而后利用双L型的阵形特点和三角函数之间的关系完成配对过程,有效地解决了不同信源之间的仰角和方位角之差较接近时所出现的配对错误。此方法在不依赖于信号形式和一维估计方法的前提下,提高了配对检测概率和估计精度,同时大大降低了运算量。仿真结果证实了算法在配对成功率和估计性能上的提高。A new trigonometric function pair matching method employing double L-shape array is proposed.The purpose is to show a way to remove pairing failure and high computational complexity.Firstly,using one dimensional estimation method to get vectors constructed by the trigonometric function of elevation and azimuth angles.Then pairing processing can be completed by the geometric characteristics of the double L-shape array and the relationship of the trigonometric function.It removes the pairing failure when the subtraction between the elevation and azimuth of difference sources is very small.This method does not depend on signal modulation and estimation algorithm.Therefore,it improves detective probability and the accuracy of estimation,meanwhile greatly decreases the computational load.Simulation results verify the improvement of pairing and estimation.

关 键 词：阵列信号 二维波达方向估计 三角函数法 双L型阵列 配对 

分 类 号：TN820[电子电信—信息与通信工程]