基于四元数MUSIC的双极化散射中心参量提取  

Double-polarization scattering centers extraction based on quaternion MUSIC

作　　者：蔡倩[1] 汪飞[2] 张焕春[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016 [2]南京航空航天大学信息科学与技术学院,江苏南京210016

出　　处：《山东大学学报（工学版）》2010年第2期47-51,共5页Journal of Shandong University（Engineering Science）

基　　金：江苏省"六大人才高峰"计划A类资助项目(P0952-041)

摘　　要：针对既有水平极化发射水平极化接收,又有垂直极化发射垂直极化接收数据的双极化雷达目标散射中心模型,提出用四元数MUSIC算法进行参量提取。该算法首先将hh和vv数据用四元数联系起来,然后采用MUSIC算法的思想,构造四元数信号子空间和四元数噪声子空间,并利用四元数噪声子空间和四元数信号子空间相互正交的特性,通过谱峰搜索估计双极化散射中心的参量。同复数域的MUSIC算法相比,四元数MUSIC算法在信噪比较低时仍能较好地估计出散射中心参量。仿真实验验证了算法的有效性。For double-polarization scattering centers extraction with horizontal irradiating and horizontal receiving and the vertical irradiating and vertical receiving,the scattering centers＇ parameters were proposed with the quaternion MUSIC algorithm.This method connects the hh data with vv data first using quaternion,and then constructs the quaternion signal subspace and noise subspace thought of MUSIC.Finally,the peak searching method was used to estimate the double-polarization scattering centers＇ parameters by taking advantage of the orthogonal property of quaternion signal subspace and noise subspace.Compared with the MUSIC algorithm in a complex domain,the quaternion MUSIC was still effective in the estimate of scattering center parameters with a low signal noise ratio.The effectiveness of this algorithm was illustrated by a simulation experiment.

关 键 词：四元数 子空间 极化 散射中心 参量估计 

分 类 号：TN91[电子电信—通信与信息系统]