基于二次虚拟孔径扩展的双基地MIMO雷达相干分布式目标中心角度估计

发布时间：2018-03-19 06:28

本文选题：双基地MIMO雷达　切入点：最小冗余阵列　出处：《电子与信息学报》2014年04期 　论文类型：期刊论文

【摘要】：该文提出了基于二次虚拟孔径扩展的双基地MIMO雷达相干分布式目标中心角度估计算法。首先构造了基于非均匀阵列的具有相同确定性角信号分布函数和分布参数的相干分布式目标的双基地MIMO雷达信号模型,再利用基于最小冗余的差分共置阵列思想,实现了阵元二次虚拟扩展;然后通过构造置换、去冗余和换维矩阵,得到了新的协方差矩阵;最后利用ESPRIT算法思想,估计出相干分布式目标的发射、接收中心角,并且实现了角度参数的自动配对。由于该文算法实现了阵元二次虚拟扩展,因此相比于传统MIMO雷达能识别更多的目标,具有更高的估计精度。实验仿真结果证明了该文算法的有效性。
[Abstract]:In this paper, an angle estimation algorithm for coherent distributed target of bistatic MIMO radar based on Quadratic Virtual Aperture expansion is proposed. Firstly, the distribution function and distribution parameters of the same deterministic angular signal based on non-uniform array are constructed. Bistatic MIMO radar signal model of coherent distributed target, Using the idea of differential co-array based on minimum redundancy, the quadratic virtual extension of array elements is realized, and then a new covariance matrix is obtained by constructing permutation, eliminating redundancy and changing dimension matrix. Finally, the idea of ESPRIT algorithm is used. The transmitting and receiving center angles of coherent distributed targets are estimated, and the automatic pairing of angle parameters is realized. Because the algorithm realizes the quadratic virtual expansion of array elements, it can recognize more targets than traditional MIMO radar. The experimental results show that the proposed algorithm is effective.
【作者单位】：合肥电子工程学院;
【基金】：国家自然科学基金(60702015)资助课题
【分类号】：TN957.51

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