Spotlight synthetic aperture radar (SAR) system and method for generating a SAR map in real-time using a modified polar format algorithm (PFA) approach

摘要

Embodiments of spotlight synthetic aperture radar (SAR) systems and methods generating a SAR map in real time with minimum latency using a modified Polar Format Algorithm are generally described herein. Other embodiments may be described and claimed. In some embodiments, FPGA implemented down-range and cross-range resampling filters generate fully interpolated data which may be FFT processed as it is generated. In some embodiments, the down-range resample filter and the cross-range resample filter are output-based resampling filters that align a sinc function with an output grid and input coordinates define filter coefficients to modulate the input samples. In some embodiments, the down-range and cross-range resample filtering, coordinate generation, timing, address, and control, fully-interpolated data storage and the down-range FFT may be implemented in a single FPGA.