面向应急通信的高集成度DRM基带调制器设计  

Design of Highly Integrated DRM Baseband Modulator for Emergency Communication

作　　者：卫中阳 张红升[1] 马小东 易胜宏 WEI Zhongyang;ZHANG Hongsheng;MA Xiaodong;YI Shenghong(College of Optoelectronics Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《无线电工程》2022年第8期1466-1472,共7页Radio Engineering

基　　金：重庆市科技攻关计划(cstc2021jscx-rhcxzy0042)。

摘　　要：针对重大自然灾害中大尺度区域应急通信需求,设计了一种高集成度的数字短波广播(Digital Radio Mondiale,DRM)发射系统。为实现高集成度和设计灵活性,采用片上系统(System on Chip,SoC)结构,将基带信号与上变频芯片进行耦合设计,利用硬件电路的高速数据处理能力完成多载波调制,并利用软件设计的灵活性在单芯片上生成基带信号。采用Zynq-7020开发板,搭建基带信号调制系统,设计了无线传输整体硬件电路。在提高发射系统集成度的基础上,还具有发射频点可重构的优点,以有效应对短波频率选择性衰落。理论分析与仿真结果表明,基于SoC结构的DRM调制系统可以正确稳定输出用于上变频的器件的基带I/Q信号,具备较高的工程价值。In response to the large-scale regional emergency communication needs in major natural disasters,a highly integrated Digital Radio Mondiale(DRM)transmitting system is designed.In order to achieve high integration and design flexibility,the System on Chip(SoC)structure is adopted,the baseband signal and the up-conversion chip are coupled and designed,the high-speed data processing capability of hardware circuit is used to realize multi-carrier modulation,and the flexibility of software design is used to generate baseband signals on a single chip.The Zynq-7020 development board is used to build a baseband signal modulation system,and the overall hardware circuit for wireless transmission is designed.In addition to improving the integration level of the transmitting system,it also has the advantage of reconfigurable transmitting radio frequency points to effectively deal with HF frequency selective fading.Theoretical analysis and simulation results show that the DRM modulation system based on the SoC structure can correctly and stably output the baseband I/Q signal of the device used for up-conversion,which has high engineering value.

关 键 词：片上系统 数字短波 多载波通信 高集成度 基带调制器 

分 类 号：TN925[电子电信—通信与信息系统]