LFMCW bistatic ISAR space target velocity compensation based on IPD method

The `stop-and-go´ approximation in the traditional ISAR processing cannot be satisfied in the LFMCW bistatic ISAR system, especially to the space target with high speed. The high speed can produce a high order polynomial phase in the frequency sweep cycle time, which will defocus the high range resolution profiles (HRRPs). In this paper, the LFMCW bistatic ISAR signal model of the space target is presented firstly. Secondly, in order to obtain the focused HRRPs, an iterative phase difference (IPD) method is proposed to remove the high order polynomial phase components. Finally, the effectiveness of the proposed algorithm is verified with simulated data.