赵永波,,
庞晓娇,
曹成虎,
陈胜
西安电子科技大学雷达信号处理国家重点实验室 西安 710071
基金项目:高等学校学科创新引智计划(B18039)
详细信息
作者简介:刘东贺：男，1994年生，博士生，研究方向为MIMO雷达阵列信号处理
赵永波：男，1972年生，教授，博士生导师，研究方向为雷达信号处理、自适应信号处理和雷达信号参数估计
庞晓娇：女，1993年生，博士生，研究方向为压缩感知和阵列信号处理
曹成虎：男，1987年生，博士生，研究方向为微弱目标检测与跟踪
陈胜：男，1993年生，博士生，研究方向为雷达信号处理和MIMO雷达
通讯作者:赵永波 ybzhao@xidian.edu.cn
中图分类号:TN958计量
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被引次数:0
出版历程
收稿日期:2020-06-15
修回日期:2021-04-02
网络出版日期:2021-05-06
刊出日期:2021-12-21
DOA Estimation Algorithm Based on Reduced-dimensional Beamspace with Real-valued ESPRIT for Monostatic MIMO Radar
Donghe LIU,Yongbo ZHAO,,
Xiaojiao PANG,
Chenghu CAO,
Sheng CHEN
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
Funds:The Fund for Foreign Scholars in University Research and Teaching Programs(B18039)
摘要
摘要:单基地多输入多输出(MIMO)雷达的波达方向(DOA)估计问题是近年来研究的热点。高维度的MIMO雷达数据，导致传统旋转不变性参数估计技术(ESPRIT)算法需要付出较大的运算代价。在低信噪比、低快拍数的条件下，传统ESPRIT算法性能会严重下降。为了克服传统ESPRIT算法的以上缺点，该文提出一种降维波束空间的实值ESPRIT算法。该算法通过转换矩阵，将高维度MIMO雷达数据转换到低维度的数据，从而去除数据中的冗余。然后再将低维数据变换到波束空间，构造实值旋转不变性等式，用以估计目标的角度。仿真结果表明，在低信噪比和低快拍数时，相比于传统ESPRIT算法，该文所提方法具有更好的角度估计性能和更少的运算量。
关键词:多输入多输出雷达/
DOA估计/
降维变换/
波束空间/
实值ESPRIT
Abstract:The Direction Of Arrival (DOA) estimation is a hot topic for a monostatic Multiple Input Multiple Output (MIMO) radar in recent years. The conventional Estimation of Signal Parameters via Rotational Invariance Technique (ESPRIT) algorithms need to pay much computation cost because of the high-dimensional MIMO radar data. When the Signal-to-Noise Ratio (SNR) is low and the number of sample are small, the performance of the conventional ESPRIT algorithms degrades seriously. To overcome the disadvantages of conventional ESPRIT algorithms, a novel algorithm which is called as reduced-dimensional beamspace with real-valued ESPRIT for monostatic MIMO radar is proposed. To eliminate the redundancy, the high-dimensional MIMO radar data is transformed into the low-dimensional data through the transformation matrix. To reduce further the computation complexity, the low-dimensional data is transformed into beamspace. Then the real-valued rotation invariance equation is constructed to estimate the target’s DOA. Simulation results show the proposed algorithm has better angle estimation performance and less computation burden than traditional ESPRIT algorithms.
Key words:Multiple Input Multiple Output (MIMO) radar/
Direction Of Arrival (DOA) estimation/
Reduced-dimensional transformation/
Beamspace/
Real-valued Estimation of Signal Parameters via Rotational Invariance Technique (ESPRIT)
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