针对雷达对运动目标的测距问题，根据运动目标在宽带线性调频脉冲照射下的回波特点 , 提出了一种采用 Radon-Wigner变换进行运动目标测距的方法。该方法首先研究了运动目标多散射点回波信号经 Stretch处理的数学模型，然后针对处理后回波的叠加性和线性调频特点，利用 Radon-Wigner变换的时频聚集特性，对其进行调频参数的估计，进而实现匀速运动目标的测距。仿真结果表明，该方法对运动目标的测距是有效的。

According to the question of Radar ranging for the moving target, using the echo characteristic of wideband linear frequency modulated pulse, a method of range measuring for moving target based on Radon-Wigner transform is proposed. In this method, firstly, a mathematic model of stretch processing for moving target scatter echo is studied. Secondly, according to the superposition of echo and the characteristic of LFM after stretch processing, the parameter of frequency modulation is estimated with the excellent time-frequency concentration performance of Radon-Wigner transform. Finally, the range of moving target is measured. The results show that this method is effective for range measuring of moving target.