基于FPGA的数字下变频模块设计  

Design of Digital Down Conversion Module Based on FPGA

作　　者：余立[1] 

机构地区：[1]中国电子科技集团公司第二十研究所,陕西西安710068

出　　处：《中国西部科技》2015年第5期77-78,共2页Science and Technology of West China

摘　　要：雷达数字下变频模块电路的主要作用是对接收到的中频回波信号进行A/D变换,并进行数字下变频处理。数字下变频(DDC:Digital Down Convert)技术是将中频信号数字下变频至零中频,且使信号速率降至通用DSP器件能处理的速率的技术。本文介绍了一种基于FPGA的6通道数字下变频模块设计,接收6路中频模拟信号,经ADC进行模数变换后送至FPGA进行数字下变频处理,数字信号经光纤收发模块传输至信号处理单元。The main effect of digital down conversion module circuit isA/D transformation and digital down conversion of the received intermediate frequency echo. Digital down conversion technology can convert the intermediate frequency signals into zero intermediate frequency signals, and can make the signal rate suit for the process by general DSP device. This paper introduced a design of 6 channel digital down conversion module based on FPGA, which receives 6 intermediate frequency analog signals, and sends it to FPGA after converted from analog to digital by ADC converter. The digital signals were transmitted to the signal processing unit through the optical transceiver module.

关 键 词：数字下变频 FPGA 光纤收发模块 ADC 

分 类 号：TN92[电子电信—通信与信息系统]