多通道高速数字收发设计  

A Multi-channel High-speed Digital Transceiver

作　　者：胡晓芳[1,2] 郑世连 朱亮[1,2] 魏云清 HU Xiaofang;ZHENG Shilian;ZHU Liang;WEI Yunqing(The 38th Research Institute, CETC , Hefei 230088 , China;Anhui Province Engineering Laboratory for Antennas and Microwave, Hefei 230088 , China)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088 [2]安徽省天线与微波工程实验室,合肥230088

出　　处：《现代雷达》2019年第5期73-76,共4页Modern Radar

摘　　要：雷达系统小型化的发展趋势要求收发分系统不断提高集成度以减小设备体积。文中介绍了一种多通道高速数字收发模块的设计方法,在一个模块上同时实现16通道射频波形产生和16通道中频采集功能。波形产生基于数字直接合成方式,工作频率1.6 GHz,可直接输出射频波形,波形控制参数可通过光纤接口调节。中频采样使用多通道模数转换器芯片实现,阻抗匹配电路保证了模数转换的性能。测试表明:模块性能指标满足系统使用需求,且已成功应用于某雷达系统中。To meet miniaturization trend of radar, integration and volume of transceiver need to be improved. A multi-channel high-speed digital transceiver is presented, which implements 16-channel digital radio frequercy(RF) waveform generation and intermediate frequency(IF) signal sampling in one module. Waveform generation is implemented based on direct digital synthesis(DDS), and wave parameters could be set via optical. With 1.6 GHz sample clock, DDS can produce RF signal directly. Multi-channel analog-to-digital converters are used to sample IF signal. Impedance matched circuits is carefully designed to guarantee sampling performance. Test results indicate that performance of this transceiver is good enough for radars system, and it has been successfully used in a radar.

关 键 词：多通道数字收发 数字直接合成 模数转换器 数字下变频 

分 类 号：TN957.5[电子电信—信号与信息处理]