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中文摘要：
窄带外辐射源数目通常稀少且分布不均匀，实际情况下通常不能够利用多个外辐射源对目标成像，本文针对单个外辐射源，通过部署多个接收站的方式来等效合成孔径以对目标成像。首先分析了多基地外辐射源雷达成像系统的目标回波形式，得到了目标散射函数与雷达接收信号之间的傅里叶变换对关系；然后利用目标散射点的稀疏先验知识，借助压缩感知算法恢复目标散射系数；最后利用模拟退火算法对接收站的位置进行优化，以降低字典矩阵的列相关系数。仿真结果表明，在等效子孔径不能形成完整孔径时，所提方法可以明显改善图像重构性能。
英文摘要：
Due to usually a small number of narrowband external illuminators and their uneven distribution, a single external illuminator and several receivers are used to synthetize aperture equivalently. The form of the target echo of the multistatic passive radar system is analyzed, and then the relationship of Fourier transform pair between target scattering function and the echo received by radar is deduced. Based on the prior knowledge of sparse distribution of the target, the algorithm of Compressed Sensing is used to recover the scattering coefficient of targets. Finally, the positions of receivers have been optimized by minimizing the correlation of the dictionary matrix based on minimizing the correlation coefficient of the dictionary matrix by the algorithm of Simulated Annealing （SA）. Simulations show that the performance of the recovery of the image is improved significantly after optimizing.
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