Aiming at the structure of a LFMCW radar system, a hardware platform for IF signal receiver is presented. This system design uses AD8347 as direct I/Q demodulator, uses AD9248 as A/D converter, uses EP3C80 to process digital signal, and uses PCI9054 as PCI interface. And it also gives the design method of the system software, which realizes the receiving, processing and storage of IF signal of LFMCW radar. Through the test, the receiver. can accurately measure out the frequency of target signal, which could provide original data for radar imaging.%针对一种线性调频连续波(LFMCW)雷达系统结构,提出一种中频接收机硬件平台的设计方案.该方案采用AD8347正交解调器做I/Q下变频,AD9248模数转换器做采样,EP3C80 FPGA做数字信号处理,PCI9054做PCI接口,并给出了系统软件的设计方法.实现了对线性调频连续波雷达中频信号的接收、处理和存储.通过测试,该接收机能够准确测量出目标信号的频率信息,可为雷达成像提供原始数据.
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