DMR信号基带关键技术研究与FPGA设计实现

发布时间：2018-03-24 06:06

本文选题：DMR　切入点：4CPFSK　出处：《电子科技大学》2014年硕士论文

【摘要】：DMR是由欧洲电信标准协会(ESTI)专门为移动无线通讯用户制定的数字无线通讯标准,并于2005年获得正式批准。它支持语音通讯、数据传输和其他补充服务。DMR标准能够提高频谱利用率,增大通讯容量,节约使用成本,让用户得到更加清晰可靠和便捷高效的无线通信服务。国外对DMR标准的研究已经趋于成熟,国内由于引进标准较晚,近几年才开始研究,并且大部分研究都是基于DSP平台实现,不利于后续功能扩展和升级。因此,论文在DMR集群通信标准下,研究DMR信号基带处理关键技术,并在具有可扩展性的软件无线电平台上进行实现。第一,设计了DMR信号基带仿真链路。DMR采用4CPFSK调制方式,并且属于突发通信系统,综合考虑系统通信性能和实现时的复杂度,设计了DMR基带仿真链路。仿真结果表明在012dBbE N=的信噪比条件下,误比特率能够降低到10-3,完全满足DMR语音通信需求。第二,给出了DMR信号基带总体设计方案。对DMR发射机和接收机的数字信号处理模块进行设计和划分,在FPGA上实现基带信号处理算法,并进行功能仿真,确保DMR信号基带链路功能正确。第三,测试了DMR信号基带链路的功能和性能。在软件无线电平台上进行验证,通过FPGA在线调试工具Chipscope对信号处理模块进行测试和结果分析,表明模块功能正确。在直通模式下进行点对点通信,通过在测试信号中加入噪声模拟实际通信环境下进行测试,当b0E N在14dB时,误比特率可以达到DMR语音通信10-3量级的要求,达到了项目预期目标。论文中研究的内容对DMR基带信号处理提供了一种实现方案,可以为DMR数字对讲机的研发提供参考,具有预研价值。
[Abstract]:DMR, a digital wireless communication standard developed by the European Telecommunications Standards Association (DMR) for mobile wireless users, was officially approved in 2005. It supports voice communications. The data transmission and other supplementary services. DMR standard can improve spectrum efficiency, increase communication capacity and save cost. The research on DMR standards in foreign countries has become more mature. Due to the late introduction of standards in China, the research began in recent years, and most of the research is based on the DSP platform, and most of the research is based on the DSP platform, and most of the research is based on the DSP platform. Therefore, this paper studies the key technology of DMR signal baseband processing under the DMR trunking communication standard, and implements it on the extensible software radio platform. The baseband simulation link of DMR signal. DMR adopts 4CPFSK modulation mode and belongs to burst communication system. The communication performance and complexity of the system are considered synthetically. The DMR baseband simulation link is designed. The simulation results show that the bit error rate can be reduced to 10 ~ (-3) under the SNR of 012dBbE N =, which fully meets the needs of DMR speech communication. The overall design scheme of DMR signal baseband is given. The digital signal processing module of DMR transmitter and receiver is designed and partitioned, the baseband signal processing algorithm is implemented on FPGA, and the function simulation is carried out. To ensure that the DMR signal baseband link function is correct. Thirdly, the function and performance of the DMR signal baseband link are tested. It is verified on the software radio platform, and the signal processing module is tested and analyzed by the FPGA on-line debugging tool Chipscope. It shows that the function of the module is correct. The point-to-point communication is carried out in through mode. By adding noise to the test signal to simulate the actual communication environment, when B0E N is in 14dB, the bit error rate can reach the requirement of 10-3 order of magnitude for DMR voice communication. The research in this paper provides a scheme for DMR baseband signal processing, which can be used as a reference for the research and development of DMR digital interphone, and has the value of pre-research.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN791;TN92

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