星载SAR预处理缓存系统研究

Research on On-Board Spaceborne SAR Pretreatment System

针对某星载合成孔径雷达快视成像系统具有数据量大、存储量大等特点,分析了其信号处理系统应有的功能,提出了一种使用FPGA进行距离向降采样滤波的方法,解决了FPGA控制2GB SDRAM存储器的技术问题,并实现了基于高性能浮点DSP和大规模FPGA的异构处理系统。

This paper contains the satellite synthetic aperture radar signal processing with large amounts of data, large memory capacity and other characteristics, It analysised the function of the signal processing system, a method of using FPGA to reduce the ranging sampling filter, solved controlling 2 GB SDRAM memory based on FPGA, and implemented isomerous system of high-performance floating-point DSP and large scale FPGA.