数字集群对讲机的基带算法分析及实现
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摘要
无线数字对讲机具有即时通信、经济实用、成本低廉、使用方便以及无需通信费等优点,因此广泛应用在民用、军用、紧急事件处理等方面,尤其在紧急事件处理以及没有手机网络覆盖的情况下,无线数字对讲机更加显示出它的不可取代的地位。本论文的主要工作是分析DMR数字对讲机的基带关键算法,并介绍了一种基于MCU和DSP的DMR新型通信协议的数字对讲机终端的基带模块的硬件设计。
本论文首先概要地介绍了数字移动无线(DMR)标准及无线对讲机的发展现状和项目背景;其次介绍了在基带信号处理过程中,各个逻辑信道所采用的信道编解码方案,包括CRC、卷积编码、维特比译码、交织等并对全速率语音信道的误码率进行了仿真;然后对GMSK调制和解调的原理进行了详细地公式推导和说明;最后详细说明了信道编解码及GMSK调制和解调实现的过程、调试方法及结果。
Wireless digital interphone is economical and practical with advantages of instant communication, low cost and convenience to use and free communication cost. Therefore, it is widely used in civil fields and conducting emergencies. Especially in the cases of emergency conducting and environment without mobile network covering, wireless digital interphone plays a remarkable and irreplaceable role. This thesis puts focus on the analysis of the key algorithms for baseband in DMR digital interphone and introduces an innovative hardware design for digital interphone terminal baseband module based on MCU and DSP of DMR new communication protocols.
The thesis introduces DMR generally along with the current development and research background of wireless digital interphone. Secondly, it introduces the various channel encoding and decoding programs in the processing, including CRC, Convolutional coding, Viterbi decoding, interleaving etc. and simulates the error rate of full-rate voice channels. Thirdly, it gives a detailed formulas and instructions for the principle of GMSK modulation and demodulation. Finally, it illustrates in details on the generation process of channel encoding and decoding and GMSK modulation and demodulation along with the debugging methods and results.
本论文首先概要地介绍了数字移动无线(DMR)标准及无线对讲机的发展现状和项目背景;其次介绍了在基带信号处理过程中,各个逻辑信道所采用的信道编解码方案,包括CRC、卷积编码、维特比译码、交织等并对全速率语音信道的误码率进行了仿真;然后对GMSK调制和解调的原理进行了详细地公式推导和说明;最后详细说明了信道编解码及GMSK调制和解调实现的过程、调试方法及结果。
Wireless digital interphone is economical and practical with advantages of instant communication, low cost and convenience to use and free communication cost. Therefore, it is widely used in civil fields and conducting emergencies. Especially in the cases of emergency conducting and environment without mobile network covering, wireless digital interphone plays a remarkable and irreplaceable role. This thesis puts focus on the analysis of the key algorithms for baseband in DMR digital interphone and introduces an innovative hardware design for digital interphone terminal baseband module based on MCU and DSP of DMR new communication protocols.
The thesis introduces DMR generally along with the current development and research background of wireless digital interphone. Secondly, it introduces the various channel encoding and decoding programs in the processing, including CRC, Convolutional coding, Viterbi decoding, interleaving etc. and simulates the error rate of full-rate voice channels. Thirdly, it gives a detailed formulas and instructions for the principle of GMSK modulation and demodulation. Finally, it illustrates in details on the generation process of channel encoding and decoding and GMSK modulation and demodulation along with the debugging methods and results.
引文
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[7]戴明桢,周建江.TMS320C54x DSP结构、原理及应用[M].北京:北京航空航天出版社,2003
[8]程佩清.数字信号处理教程[M].北京:清华大学出版社,2001
[9]颜友钧,朱宇光. DSP应用技术教程[M].北京:中国电力出版社,2002
[10]刘益成. TMS320C54xDSP应用程序设计与开发[M].北京:北京航空航天出版社,2002
[11]熊于菽. GMSK调制解调技术研究[D].重庆:重庆大学,2007.9
[12]娄莉. GMSK数字调制的仿真与分析[D].西安:西安石油大学,2004.6
[13]刘少阳,邹冰.(2,1,7)卷积编码及其维特比译码算法的软件实现[D].长沙:信息与电子工程,2006.12
[14]Digital Voice Systems.AMBE-2000TM Vocoder Chip Users Manual.Vol.4.8.2007,3:6-11
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[16] Texas Instruments.OMAP5912 Applications Processor Data Manual.2005,12:22-23
[17] Michele Morelli,Umberto Mengali . Joint Phase and Timing Recovery With CPM Signals.IEEE transactions on communications,Vol.45,1997,7:869-876
[18] Texas Instruments.OMAP5910/5912 Multimedia Processor DSP Subsystem Reference Guide,2005,5:17-27
[19]廖海红.通信系统中的CRC算法的研究和工程实现.北京:北京邮电大学,2006,349-350
[20]方向前,魏平俊.基于DSP的Viterbi译码器.郑州:半导体技术,2005,6
[2]王文钦.DSP&FPGA在未来无线通信中的应用研究,第三届国际嵌入式研讨会论文集,2003
[3]王金龙,沈良,任国春等.无线通信系统的DSP实现,人民邮电出版社,2002
[4]李小文,李贵勇,陈贤亮,等.第三代移动通信系统、信令及实现[M].北京:人民邮电出版社,2003
[5]周霖. DSP通信工程技术应用[M].北京:国防工业出版社,2003
[6]申敏,刘栋. DSP原理及其在移动通信中的应用[M].北京:人民邮电出版社,2001
[7]戴明桢,周建江.TMS320C54x DSP结构、原理及应用[M].北京:北京航空航天出版社,2003
[8]程佩清.数字信号处理教程[M].北京:清华大学出版社,2001
[9]颜友钧,朱宇光. DSP应用技术教程[M].北京:中国电力出版社,2002
[10]刘益成. TMS320C54xDSP应用程序设计与开发[M].北京:北京航空航天出版社,2002
[11]熊于菽. GMSK调制解调技术研究[D].重庆:重庆大学,2007.9
[12]娄莉. GMSK数字调制的仿真与分析[D].西安:西安石油大学,2004.6
[13]刘少阳,邹冰.(2,1,7)卷积编码及其维特比译码算法的软件实现[D].长沙:信息与电子工程,2006.12
[14]Digital Voice Systems.AMBE-2000TM Vocoder Chip Users Manual.Vol.4.8.2007,3:6-11
[15]Franklin F.Kuo.Error Control Coding:Fundamentals and Applications. Prentic-Hall Inc.1983:317-318
[16] Texas Instruments.OMAP5912 Applications Processor Data Manual.2005,12:22-23
[17] Michele Morelli,Umberto Mengali . Joint Phase and Timing Recovery With CPM Signals.IEEE transactions on communications,Vol.45,1997,7:869-876
[18] Texas Instruments.OMAP5910/5912 Multimedia Processor DSP Subsystem Reference Guide,2005,5:17-27
[19]廖海红.通信系统中的CRC算法的研究和工程实现.北京:北京邮电大学,2006,349-350
[20]方向前,魏平俊.基于DSP的Viterbi译码器.郑州:半导体技术,2005,6