一种基于预处理方案的SAR成像信号处理机-《计算机技术与发展》

文章信息/Info

Keywords:: small-size SAR imaging system; frequency-modulated continuous wave ; signal processor; pre-processing

摘要:: 介绍一种以高性能FPGA为主进行大数据量雷达信号预处理，以DSP为辅进行成像算法执行和图像调整的信号处理机改进方案，可以在体积和功耗受到严格限制的条件下完成机载合成孔径雷达（SAR）成像数据实时处理任务。采用该方案设计的信号处理机已成功应用于某小型化调频连续波SAR成像系统，并经过多次外场挂飞实验验证，得到了满足设计要求的实时SAR图像。基于此方案甚至可以满足弹载雷达成像数据处理需求，在体积、功耗以及软、硬件成本等各方面均远远优于常用的DSP解决方案

Abstract:: Introduce an improvement scheme of signal processor, which relies mainly on high- performance FPGA to execute the task of pre-processing the great quantity of radar signal data while DSP to execute the task of imaging algorithms and images adjusting subsidiary,it can accomplish airborne SAR （synthetic aperture radar） data real-time imaging tasks on the strict conditions of size and power dissipation. A signal processor designed by this scheme has been successfully used in a small-size FMCW （ frequency-modulated continuous wave） SAR imaging system. It also has been tested and verified in practical airborne tests and got the real-time SAR images which can meet the needs of design. Based on this scheme, it even can meet the requirement of missile-borne radar imaging data processing. It has more advantage than normal DSP scheme from size,power dissipation and cost of software and hardware several aspects