High resolution SAR signal processing system using FPGA

Abstract

The synthetic aperture radar signal processing system based on FPGA is designed and implemented in this paper. The Polar Format Algorithm (PFA) using the principle of chirp scaling (PCS) for range processing and Sinc interpolation for azimuth processing will achieve high precision results and increase speed significantly. The phase gradient autofocus and the geometric correction are also applied to estimate and compensate for the residual phase error accurately and realize wavefront curvature correction. The system is built on Virtex7-XC7VX690T evaluation board, it takes 2.1s to obtain 4K*2K complex-image in single precision, and the real data processing results verify the reliability and stability of the proposed system.