基于矩阵重构的非圆信号ESPRIT算法  

ESPRIT algorithm for non-circular signals based on matrix reconstruction

作　　者：司伟建[1] 林晴晴[1] 张铁军[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]总参陆航部驻上海地区军事代表室,上海200233

出　　处：《中南大学学报（自然科学版）》2013年第12期4936-4941,共6页Journal of Central South University:Science and Technology

基　　金：中央高校基本科研业务费重点专项资金项目(HEUCFZ1215)

摘　　要：在信号源为非圆信号的情况下,提出一种基于矩阵重构的ESPRIT波达方向估计方法。根据非圆信号为实值信号的特点,首先通过对接收数据矩阵进行共轭重排,构造多个具有旋转不变关系的子阵;为抑制噪声对算法的影响,对接收数据矩阵进行延迟处理,并构造其与各子阵之间的协方差矩阵;最后利用ESPRIT算法的原理实现信号波达方向的估计。仿真结果表明:在相同的信噪比和快拍数条件下,算法的正确分辨概率和测角精度均优于ESPRIT算法,并且在信号入射角度间隔较小时也具有良好的分辨性能。To estimate the direction-of-arrival （DOA） of non-circular signals, an estimation of signal parameters via rotational invariance techniques （ESPRIT） algorithm based on data matrix reconstruction was presented. Firstly, considering the properties of non-circular signals, sub-matrixes with rotational invariance relationship were conducted by conjugating and reconstructing the received data. In order to restrain the interference of noise, we delayed the received data matrix, and conducted the covariance matrixes between sub-matrixes and the delayed received data matrix. At last, the DOAs of signals were estimated by ESPRIT algorithm. Simulation results show that the resolution performance and angular precision of the proposed algorithm are better than those of ESPRIT algorithm under the same signal to noise ratio （SNR）, and it has better resolution performance at the condition of small angle spacing.

关 键 词：波达方向 ESPRIT算法 非圆信号 数据矩阵重构 

分 类 号：TN911.7[电子电信—通信与信息系统]