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以宽带线性调频连续波体制雷达为背景,研究了运动目标长时间相参积累时的距离走动和多普勒展宽特性,给出了相应的距离多普勒平面展宽面积与信噪比损失的显式函数,进而提出了一种基于距离-多普勒二维最小波形熵的速度模糊次数寻优准则。结合Keystone变换和CLEAN算法探讨了强杂波背景下的运动目标相参处理流程,最后利用仿真实验验证了文中所提算法的有效性。
Based on the wideband chirp radar system, the distance and Doppler broadening characteristics of moving objects during long time coherent accumulation are studied. The corresponding Doppler plane broadening area and loss of signal to noise ratio Then a new speed fuzzy number optimization criterion based on distance-Doppler two-dimensional minimum waveform entropy is proposed. Combined with the Keystone transform and CLEAN algorithm, the flow of coherent processing of moving targets in the background of strong clutter is discussed. Finally, the validity of the proposed algorithm is verified by simulation experiments.