该文提出一种新的单频连续波无源雷达成像时域算法。该算法先建立信号匹配矩阵，再将接收到的回波信号拓展为回波信号矩阵，然后将信号匹配矩阵和回波信号矩阵的 Hadamard 积在时间维上求和，实现回波信号的匹配积累，得到散射点目标的像。给出了算法成像分辨率，分析了影响成像质量的因素并综合得到算法聚焦能力的量度。算法完全在时域中进行成像处理，避免了频域的插值处理。在理论分析的基础上，仿真实验得到了较好成像结果，验证了所提算法有效性。%A novel passive radar imaging time-domain algorithm is presented based on single-frequency continuous wave. The signal matched matrix is builded firstly, and the echo signal is expanded into a echo signal matrix. Finally the sum in time dimension of the Hadamard product of the signal matched matrix and the echo signal matrix can be got. Then the echo signal matched integration is implemented and the scattering points are focused. The algorithm resolution and factors of affecting the imaging quality are analyzed. The algorithm is performed in time domain and the interpolation in frequency domain is avoided. Based on the theoretical analysis, simulation experiment confirms the validity of the proposed algorithm.
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