基于FPGA和DSP的雷达信号脉冲压缩

Pulse compression of radar signal based on FPGA and DSP

研究基于FPGA和DSP的线性调频信号脉冲压缩的一种实现方法,FPGA负责信号的预处理,主要包括FIR滤波和正交解调,DSP负责脉冲压缩的实现,给出了FPGA各部分的功能框图和DSP的算法流程图,对比了匹配滤波器加窗前后脉冲压缩结果的第一距离旁瓣的变化。结果表明,加窗后匹配滤波器输出的旁瓣距峰值衰减由13 d B增加至32 d B。

The implementation method for pulse compression of linear frequency modulation（LFM） signal based on FPGA and DSP is researched,in which FPGA is responsible for signal preprocessing,and DSP is responsible for the implementation of pulse compression. Function block diagrams of each FPGA module and the algorithm flow chart of DSP are given. The change of the first distance side-lobe of pulse compression results before and after adding the window of the matched filter is compared.The result shows that after adding the window,the side-lobe peak attenuation output by the matched filter is increased from 13 d B to 32 d B.