基于FPGA的FMCW雷达收发机系统

FMCW Radar Transceiver System Based on FPGA

以24 GHz线性调频连续波(Frequency Modulated Continuous Wave,FMCW)雷达测距测速原理为基础,分析了两种调制方式的优劣,并设计了一种从发射信号调制到回波信号采集的电路系统,包括中频电路板和现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)开发板。系统采集的基带信号被送入个人计算机(Personal Computer,PC),并在PC机中处理基带信号得到目标距离。实验结果表明,此系统可以实现雷达的信号采集和测距功能,为深入研究雷达信号处理和对雷达的拓展应用提供了一种新方案。

Based on the principle of range and velocity measurement of 24 GHz Frequency Modulated Continuous Wave(FMCW)radar, the advantages and disadvantages of the two modulation modes are analyzed, and a circuit system from transmitting signal modulation to echo signal acquisition is designed, which includes intermediate frequency circuit board,and FPGA development board. The baseband signal collected from the system is sent to a PC to be processed for the distance of the target. The experimental results show that the system can realize the function of radar signal acquisition and ranging. It provides a solution for the further study of radar signal processing and the expansion of radar applications.