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航空学报  2013 

基于稀疏表示的双基地MIMO雷达多目标定位及幅相误差估计

DOI: 10.7527/S1000-6893.2013.0238, PP. 1379-1388

Keywords: 幅相误差,双基地,MIMO雷达,多目标定位,稀疏表示,稳健性

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Abstract:

基于稀疏表示理论,提出一种新的双基地多输入多输出(MIMO)雷达收发角度及幅相误差估计算法。利用接收数据,分别构造发射和接收协方差矩阵,并以列向量化后的发射和接收协方差矩阵为量测信号建立2个一维稀疏线性模型,构造模型求解的L2-L1混合范数优化目标函数,通过交替迭代寻优获得目标角度估计和幅相误差估计,最后给出了本文算法的收敛性分析。与现有算法相比,该算法充分利用了目标发射和接收空域的稀疏特性,且能够通过对噪声功率的预估计来抑制噪声。仿真结果表明在低信噪比(SNR)条件下,本文算法仍能够得到较好的估计精度,且对幅相误差具有一定的稳健性。

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