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机载阵列前视合成孔径雷达(SAR)信号模型中忽略载机速度会影响成像。针对该问题,在调频连续波(FMCW)SAR信号模型中考虑了载机速度,分析了载机速度的影响和载机连续运动引入的多普勒频率偏移的特点,结合Frequency Scaling算法,研究了机载阵列FMCW SAR前视成像。成像仿真和性能参数分析表明:改进方法可精确实现载机运动条件下的FMCW SAR前视成像。
Airborne Array Forward Looking at Synthetic Aperture Radar (SAR) Signal Model Ignoring carrier speed affects imaging. In view of this problem, the carrier speed is taken into account in the FMCW SAR signal model. The influence of the carrier speed and the Doppler frequency shift introduced by the continuous motion of the carrier are analyzed. Combined with the Frequency Scaling algorithm, Airborne Array FMCW SAR Foreground Imaging. The imaging simulation and performance parameter analysis show that the improved method can accurately predict FMCW SAR forward-looking imaging under the condition of vehicle-mounted motion.