关键词: 动目标成像, 斜距三次项, 二阶Keystone变化, 多普勒模糊

Abstract:

The long integration time required to improve the signal detection performance causes serious range cell migration,and the accurate imaging of weak target is currently achieved by efficient estimation of parameters.In this paper,a new high resolution imaging algorithm is proposed for the high speed moving target.The second-order Keystone variation results are obtained by estimating and compensating the parameters of the motion parameters.The frequency domain phase of the three terms is obtained by using the principle of stationary phase for effective estimation of the target motion parameters.The simulation results show that the algorithm can effectively accumulate and compensate the high speed weak target,and realize high resolution imaging.

Key words: moving target imaging;cubic item of the instantaneous range;second-order Keystone transform;Doppler ambiguity