空间目标一维距离像高速运动补偿方法研究

基于线性调频信号模型,针对空间目标,研究了高速运动对一维距离像产生的畸变影响;而后基于宽带测量数据。提出了两种高速运动补偿的方法:基于联合时频表示(AGR)的运动补偿方法和基于乘积型模糊函数(PHAF)的运动补偿方法;最后采用仿真数据来验证两种方法的有效性。实验结果表明:从补偿精度来看,在高信噪比情况下,两种方法补偿精度相差无几,而在低信噪比情况下AGR补偿精度更高;从适用情况来看,AGR方法适合于补偿匀高速运动,而PHAF方法适合于补偿高速机动。

The Study for Method of High Velocity Compensation for Profile of Spatial Targets

Based on Linear-Frequency-Modulated signal model,impact of high velocity on profde is studied for spatial targets. Then,based on wide-band measured data,two methods are put forward:AGR-based method and PHAF-based method.Simulated data is used to demonstrate the effectiveness of these two methods.Experiments show that:from the point view of compensation accuracy,these two methods work well under high SNR condition while AGR method is more accurately under low SNR condition;from the point view of applicability,AGR method is good for targets with evenly high velocity while PILAF method is effective for maneuvering targets.