色噪声环境下单基地MIMO雷达分布式目标角度估计

发布时间：2019-07-11 11:28

【摘要】：针对传统的二阶统计量角度估计算法在高斯色噪声环境下估计性能急剧下降甚至失效的问题,该文提出一种基于四阶累积量的单基地MIMO雷达相干分布式目标角度估计算法。首先建立单基地MIMO雷达的相干分布式目标信号模型,求取信号的四阶累积量矩阵;利用特征值分解分离出相互正交的信号子空间与噪声子空间,根据多重信号分类(MUSIC)算法原理,获得阵列的空间谱函数,通过谱峰搜索得到分布式目标的中心波达方向。该算法充分利用了四阶累积量对高斯过程的不敏感性,能够很好地抑制高斯色噪声对角度估计的影响。仿真结果证明了该算法的正确性和有效性。
[Abstract]:In this paper, a single-base MIMO radar coherent distributed target angle estimation algorithm based on the fourth-order cumulant is proposed, which is based on the fourth-order cumulant. firstly, a coherent distributed target signal model of a single-base MIMO radar is established, a fourth-order cumulant matrix of a signal is obtained, a signal subspace and a noise subspace which are mutually orthogonal are separated by using a characteristic value decomposition, a space spectrum function of an array is obtained according to the principle of a multi-signal classification (MUSIC) algorithm, And the central wave-up direction of the distributed target is obtained through the spectral peak search. The algorithm makes full use of the non-sensitivity of the fourth-order cumulant to the Gaussian process, and can well restrain the influence of the Gaussian noise on the angle estimation. The simulation results show the correctness and validity of the algorithm.
【作者单位】：哈尔滨工程大学自动化学院;
【基金】：教育部新世纪优秀人才计划(NCET-11-0827) 哈尔滨市创新人才专项(2013RFXXJ016) 中央高校基础研究项目(HEUCFZ1110,HEUCFX41308)资助课题
【分类号】：TN957.51

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