中文摘要：

研究多径环境下分布式孔径无源雷达成像方法，首先针对分布式孔径探测，给出一种新的无源雷达回波模型，该模型适用于复杂的多径散射环境，而且不需要已知发射源信息。然后研究一种基于二元假设检验的成像方法，依据最大信噪比原则构造检验统计量，该统计量依赖于空间位置信息，通过对成像区域中的每个位置进行检测，可实现空间分辨，获得成像结果。接着详细分析该方法在多径散射环境中的性能，并在模拟多径环境中采用地面数字电视信号对成像方法进行仿真实验验证。理论分析和实验结果表明，采用空间可分辨的检验统计量形成图像可以正确重建目标，并且可利用多径效应进行成像。

英文摘要：

A passive radar imaging method using distributed apertures capable of operating in multipath en- vironments is studied. First, a signal model of passive radar using distributed apertures is presented, which does not need any information of the transmitter and is applicable to multipath environments. Then, an imaging method based on binary hypothesis testing is investigated where a spatial-resolved test-statistic is determined ac- cording to the signal-to-noise ratio maximization criterion. The resulting image is formed by the test-statistic evaluated at each hypothetical target location. The performance of the imaging method in multipath environ- ments is analyzed in detail, and the digital video broadcast-terrestrial signal is used to demonstrate the perform- ance of the proposed imaging method in a simulated multipath environment. The theoretical analysis and experi- mental results show that the target can be reconstructed correctly using the proposed imaging method and the multipath propagation can be used for the imaging.