SAR成像系统重频抖动的影响及补偿

合成孔径雷达(SAR)系统要求时间严格同步，从而可利用脉冲间的相干性进行方位处理。推导了重频抖动造成的时间同步误差对SAR成像方位聚焦的影响以及其极限值，并给出了补偿方法。采用实际系统参数进行了仿真验证，并分析了存在重频抖动误差的实际SAR成像雷达系统，实测数据处理和补偿结果验证了理论的有效性。所提方法对实际雷达系统的设计、问题分析和SAR成像处理误差补偿有指导意义，具有较高的实用价值。

PRF jitter effect on and error compensation for SAR imaging system

Synthetic aperture radar(SAR) is a strict synchronization system which gets the azimuth gain by the coherence of pulses. This paper analyzes the effect of the time synchronization error by SAR radar system pulse repetition frequency(PRF) jitter and its limit and proposes an error compensation algorithm. The simulation and experimental results show the efficiency of the method.The simulation results,processing and error compensation results of experimental data are provided to prove the effectiveness and practicability of the proposed algorithm.The method is useful for system design,problem diagnosis and error compensation of practical SAR systems.