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单基地MIMO雷达降维Power-ESPRIT算法 被引量:2

Reduced-Dimensional Power-ESPRIT Algorithm for Monostatic MIMO Radar
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摘要 提出了一种新的单基地MIMO雷达波达方向(DOA)估计算法:降维Power-ESPRIT算法。该算法首先通过降维变换将MIMO雷达数据变换至低维信号空间,然后进行从复数域到实数域的转换,并在实数域上使用采样数据协方差矩阵的幂获得信号子空间的估计,最后构造实值旋转不变性方程估计目标的DOA。仿真结果表明,在低信噪比、低快拍数的环境下,该算法与已有ESPRIT方法相比,具有近似性能,却拥有较低的计算复杂度。该算法的计算复杂度是RD-ESPRIT的25%左右,是RD-UESPRIT的65%左右。 In this paper,a novel direction-of-arrival(DOA)estimation method,called reduced-dimensional Power-ESPRIT,for monostatic multiple-input multiple-output(MIMO)radar system is proposed.Firstly,the received data is transformed into a low dimensional signal space via the reduced-dimensional transformation.Then,the conversion from complex domain to real domain is carried out.Then,in the real domain,we use the power of sample data covariance matrix to get an estimate of the signal subspace.At last,the real-valued rotational invariance equations for the low dimensional signal subspace are constructed to estimate DOAs.Simulation results show that,in the low signal-to-noise-ratio(SNR)and small sample case,the proposed algorithm has a substantial computational saving with the approximation performance compared with the existing ESPRIT algorithms.Computational complexity of the proposed algorithm is about 25% of the RD-ESPRIT algorithm and is about 65% of the RD-UESPRIT algorithm.
出处 《雷达科学与技术》 北大核心 2015年第1期76-80,85,共6页 Radar Science and Technology
基金 国家自然科学基金(No.61032010)
关键词 多输入多输出雷达 波达方向 降维变换 基于旋转不变技术的信号参数估计 multiple-input multiple-output(MIMO)radar direction of arrival(DOA) reduced-dimensional transformation estimation of signal parameters via rotational invariance techniques(ESPRIT)
作者简介 窦道祥 男,1990年生于江苏徐州,电子科技大学信号与信息处理学科硕士研究生,主要研究方向为MIMOOTH雷达信号处理。E-mail:doudx812jsu@163.com 李茂 男,1983年生于山西朔州,电子科技大学信号与信息处理学科博士研究生,主要研究方向为MIMOOTH雷达信号处理。 何子述 男,1962年生于四川,信号与信息处理专业博士,电子科技大学电子工程学院教授、博士生导师,主要研究方向为天波超视距雷达技术、宽带MIMO数字阵雷达技术。
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同被引文献16

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