高速运动雷达目标一维成像新方法

针对频率步进体制雷达对高速运动雷达目标一维距离成像时所存在的问题,提出一种基于分数阶傅里叶变换的运动参数估计方法。利用估计得到的速度参数进行运动补偿后,通过改进的"循环移位"拼接算法,得到距离门内运动目标的全景一维距离像。仿真结果表明,该方法能够在较低信噪比、高速运动条件下得到高质量的一维距离像,且运算量较小,具有较高的实用价值。

A Novel Dimensional Imaging Method of High Speed Radar Target

On the analysis of one dimensional imaging question when using step frequency radar, we give a novel imaging method. Firstly, the velocity of targets was estimated based on the fractional fourier transform. Secondly, the velocity effects was compensated by the estimated parameters. Lastly, we use the improved rotation shift sticking method to obtain the panoramic range profile in the range gate. The simulation result shows we can get better range profile under lower snr and high speed using the proposed method. The method's computation burden was lower, so it has better applied value.