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基于TR MIMO雷达的相干目标DOA估计 预览

DOA Estimation for Coherent Targets Based on TR MEMO Radar
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摘要 针对MIMO(multi-input multi-output)雷达相干目标DOA(direction of arrival)估计问题,提出了一种基于Toeplitz矩阵重构的时间反转(time reversal,TR)MIMO雷达相干目标DOA估计算法。算法根据MIMO雷达接收信号模型,利用时间反转理论,建立TR MIMO雷达接收信号模型。在此模型的基础上,采用Toeplitz矩阵重构算法,去除目标的相干性,并基于一阶近似理论,利用优化迭代的方法进行DOA估计,进一步提高DOA估计的精度,并降低了计算复杂度。计算机仿真结果表明,在相同的快拍数与信噪比条件下,与传统的非时间反转MIMO雷达相比,文中的算法有更低的计算复杂度与更高的估计精度。 For coherent targets direction of arrival(DOA)estimation problem of MIMO radar,a DOA estimation algorithm for coherent targets of TR MIMO radar based on Toeplitz matrix method is proposed.Algorithm use TR theory according to the received signal model of MIMO radar to establish the received signal model of TR MIMO radar.Using Toeplitz matrix method based on the received signal model which removes the coherency of targets and utilizing an optimized iterative approach based on the first-order approximate theory that carries out DOA estimation further improve the estimation accuracy and reduce computation complexity.The results of computer simulation show that the proposed method has lower computation complexity and higher estimation accuracy compared with the conventional non-TR MIMO radar under the same snapshots and signal-to-noise ratio conditions.
作者 刘梦波 胡国平 师俊朋 周豪 LIU Mengbo;HU Guoping;SHI Junpeng;ZHOU Hao(Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China)
出处 《弹箭与制导学报》 CSCD 北大核心 2018年第6期109-112,116共5页 Journal of Projectiles Rockets Missiles and Guidance
基金 国家自然科学基金(61601504)资助.
关键词 DOA估计 TRMIMO雷达 TOEPLITZ矩阵 优化迭代方法 一阶近似 DOA estimation TR MIMO radar Toeplitz matrix optimized iterative approach first-order approximate
作者简介 第一作者:刘梦波(1994-),男,江苏徐州人,硕士研究生,研究方向:TR MIMO雷达DOA估计研究。
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