MIMO雷达GMTI性能及DOA估计的克拉美·罗界分析

›› 2010, Vol. 23 ›› Issue (10): 6-10.

MIMO雷达GMTI性能及DOA估计的克拉美·罗界分析

翟伟伟,张弓,刘文波

(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)

出版日期:2010-10-15 发布日期:2010-12-31
作者简介:翟伟伟(1983-),男,硕士研究生。研究方向:雷达信号处理。
基金资助:
航空科学基金资助项目(2008zc52026);南京航空航天大学创新基金

GMTI Performance and CramerRao Bound of DOA Estimation for MIMO Radar

ZHAI Wei-Wei, ZHANG Gong, LIU Wen-Bo

(1.College of Automation Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China;2.College of Information Science & Technology,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China)

Online:2010-10-15 Published:2010-12-31

摘要/Abstract

摘要：

研究了MIMO雷达GMTI 性能及其DOA估计的克拉美·罗界(CRB)。首先建立机载平台下MIMO雷达信号模型,通过对系统参数设置,可使MIMO雷达工作在3种不同模式中。接着分析了MIMO雷达GMTI性能,并推导出了在MIMO雷达空时信号模型下,利用空时联合域信息时DOA估计的CRB。仿真结果表明,无论是GMTI性能还是DOA估计性能,MIMO雷达均优于相控阵雷达,尤其是发射稀疏阵MIMO雷达性能最佳。同时,利用空时联合域信息能有效改善MIMO雷达DOA估计的CRB,在目标多普勒频率相差较大时效果更加明显。

关键词: MIMO雷达, GMTI性能, DOA估计, 克拉美·, 罗界, 空时信号处理

Abstract:

This paper studies the GMTI performance and Cramer-Rao Bound(CRB) of DOA estimation for MIMO radar.Firstly,the signal model of MIMO radar is builded.It can work on three different modes by setting the system parameters with different values.Then,the GMTI performance for MIMO radar is analyzed.And the CRB of DOA estimation using space-time domain information is derived.The simulation results show that MIMO radar behaves better for both GMTI performance and DOA estimation,especially the sparse-array MIMO radar.Meanwhile,using space-time domain information can effectively improve the CRB of DOA estimation for MIMO radar,especially when the targets doppler frequency has obvious difference.

Key words: MIMO radar;GMTI performance;DOA estimation;Cramer-Rao Bound(CRB);space-time signal processing

中图分类号:

TN957

翟伟伟, 张弓, 刘文波. MIMO雷达GMTI性能及DOA估计的克拉美·罗界分析[J]. , 2010, 23(10): 6-10.

ZHAI Wei-Wei, ZHANG Gong, LIU Wen-Bo. GMTI Performance and CramerRao Bound of DOA Estimation for MIMO Radar[J]. , 2010, 23(10): 6-10.

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