ISAR快速目标步进频率合成及补偿成像

Stepped frequency synthetic preprocessing and synthesis algorithm for the fast moving target

针对快速运动的空间目标提出了1种逆合成孔径雷达(inverse synthetic aperture radar,ISAR)成像的精确回波信号模型和1种快速目标ISAR步进频率合成及补偿成像算法。精确回波信号模型充分考虑到雷达脉冲发射、传播和接收过程中目标的运动,本文算法解决了精确回波信号模型下的新问题,可以对大时宽带宽积(TBP)的步进频率信号完成快速运动目标的高分辨ISAR成像处理,得到高分辨的聚焦结果。仿真实验验证了所提出算法的有效性。

An accurate ISAR echo model for fast moving targets is introduced. In such accurate echo model, the motion of a targetduring the time period of pulse transmitting, propagating, and receiving has been taken into account. To deal with new problems in the accurate echo model, a stepped frequency synthetic preprocessing and synthesis algorithm for the fast moving target is pres-ented, which is capable of obtaining a high-resolution range profile and a well-focused ISAR image with large TBP.