基于数字变频的软件无线电接收机的研究与实现
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摘要
“软件无线电-SDR”是第三代移动通信系统(3G)的关键技术之一。数字下变频技术和同步技术一直是软件无线电研究的重点,也是影响软件无线电性能最大的部分。在整个软件无线电系统的设计过程中需要耗费很多的资源和精力。
本文重点研究了数字接收机中的数字下变频(DDC)技术。在基于中频采样的条件下,对信号采样理论、数字正交混频理论、多采样率数字信号处理、高效数字滤波器进行探讨。并在此基础上设计和搭建了一个有实用价值的数字接收机平台。
该平台基于数字下变频技术,主要由功率放大器、抗混叠滤波器、A/D转换器、下变频处理器、FPGA和DSP等部分组成。本文对该接收机的组成及各部分功能进行了介绍,对其中的数字下变频器HSP50214B作了深入的研究。
然后以数字音频广播(DAB)系统为参考,结合接收机平台的信号处理能力,设计了一套适用于本系统的下变频参数,并通过仿真进行了理论验证。在此基础上,通过软件编程和硬件电路调试,实现了OFDM信号的下变频处理。之后对该平台的通用性进行了研究,并通过AM信号和ASK信号的下变频处理进行了实际验证。论文最后给出了系统调试的结果,并对部分结论进行了分析。
"Soft-Defined Radio-SDR" is the most important part in the 3G Mobile Communication System. As the key technology of SDR, DDC has been a hot research topic in this field, moreover, it plays a major role in the performance of SDR and itneeds a lot of resources and energies in the whole design process of SDR system.
This paper puts emphasis upon the DDC technology of Digital Receiver. Itanalyzes and researches signal sampling theorem, digital signal orthogonal mixing theorem, multi-sample rate signal processing and high speed digital filter based on IF sampling. And it also designs a practical DDC platform after considering these classic theories.
This platform is based on Digital Frequency Conversion technology, it consists of PA, Resist-mixing Filter, ADC, DDC, FPGA, DSP and so on. This paper introduces these crucial modules and their functions, especially does deep research in the DDC processor HSP50214B.
And then, referenced in DAB system and taking the signal processing ability of the receiver platform into consideration, we design the suitable down frequency conversion parameters of this platform, and validate it theoretically by simulation. Based on these, we implemented the down frequency conversion processing of OFDM signals by software programming and hardware circuit debugging. Then we researched the flexibility of the platform and validate it practically using AM signal. Finally, the results after system debugging are given, and the analysis of part of the conclusions are also included.
本文重点研究了数字接收机中的数字下变频(DDC)技术。在基于中频采样的条件下,对信号采样理论、数字正交混频理论、多采样率数字信号处理、高效数字滤波器进行探讨。并在此基础上设计和搭建了一个有实用价值的数字接收机平台。
该平台基于数字下变频技术,主要由功率放大器、抗混叠滤波器、A/D转换器、下变频处理器、FPGA和DSP等部分组成。本文对该接收机的组成及各部分功能进行了介绍,对其中的数字下变频器HSP50214B作了深入的研究。
然后以数字音频广播(DAB)系统为参考,结合接收机平台的信号处理能力,设计了一套适用于本系统的下变频参数,并通过仿真进行了理论验证。在此基础上,通过软件编程和硬件电路调试,实现了OFDM信号的下变频处理。之后对该平台的通用性进行了研究,并通过AM信号和ASK信号的下变频处理进行了实际验证。论文最后给出了系统调试的结果,并对部分结论进行了分析。
"Soft-Defined Radio-SDR" is the most important part in the 3G Mobile Communication System. As the key technology of SDR, DDC has been a hot research topic in this field, moreover, it plays a major role in the performance of SDR and itneeds a lot of resources and energies in the whole design process of SDR system.
This paper puts emphasis upon the DDC technology of Digital Receiver. Itanalyzes and researches signal sampling theorem, digital signal orthogonal mixing theorem, multi-sample rate signal processing and high speed digital filter based on IF sampling. And it also designs a practical DDC platform after considering these classic theories.
This platform is based on Digital Frequency Conversion technology, it consists of PA, Resist-mixing Filter, ADC, DDC, FPGA, DSP and so on. This paper introduces these crucial modules and their functions, especially does deep research in the DDC processor HSP50214B.
And then, referenced in DAB system and taking the signal processing ability of the receiver platform into consideration, we design the suitable down frequency conversion parameters of this platform, and validate it theoretically by simulation. Based on these, we implemented the down frequency conversion processing of OFDM signals by software programming and hardware circuit debugging. Then we researched the flexibility of the platform and validate it practically using AM signal. Finally, the results after system debugging are given, and the analysis of part of the conclusions are also included.
引文
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[30]伍坚.基于数字中频技术的OFDM收发信机研究与实现.北京交通大学硕士学位论文,2006
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[32]李洪伟.袁斯华编著.基于Quartus Ⅱ的FPGA/CPLD设计.第一版.电子工业出版社.2006.4
[33]John G.Proakis著.张力军.张宗橙.郑宝玉等译.数字通信.第四版.电子工业出版社.2006.1
[34]冯玉珉编著.通信系统原理.第一版.清华大学出版社.北方交通大学出版社.2003.6
[35]《AD9857 Data Sheet》.Analog Devices inc.2001
[36]胡斌编著.图表细说元器件及实用电路.第一版.北京.电子工业出版社.2005.9
[37]高鹏.安涛.寇怀成编著.电路设计与制版--Protel 99入门与提高.第一版.人民邮电出版社.2003.7
[2]张明哲.软件无线电中数字下变频的实现.北京交通大学硕士学位论文.2004
[3]谭泽富.聂祥飞.王海宝.OFDM的关键技术及应用.西南交通大学出版社.July 2005
[4]W D Warner,C Leung,OFDM/FM frame synchronization for mobile radio data communication.IEEE Trans.Vehic.Technol..1993.42(3):302-313
[5]陈后金.胡健.薛健编著.信号与系统.第一版.清华大学出版社.北方交通大学出版社.2003.3
[6]杨小牛.楼才义.徐建良编著.软件无线电原理与应用.第一版.北京.电子工业出版社.2001.1
[7]陈后金主编.薛健.胡健编.数字信号处理.第一版.高等教育出版社.2004.7
[8]Digital Spectntm Incorporated.《TMS320C6416T DSK》.2004
[9]《Cyclone Data Sheet》.Altera Corporation.2000
[10]《HSP50214B Data Sheet》.Intersil Semiconductor.May 2000
[11]《AD8320 Data Sheet》.Analog Devices inc.1998
[12]《AD9051 Data Sheet》.Analog Devices inc.2003
[13]《AD9631 Data Sheet》.Analog Devices inc.2003
[14]《AD820 Data Sheet》.Analog Devices inc.2002
[15]R.V.Nee,R.Prasad.OFDM wireless multimedia communications.Boston,Mass Artech House Publishers,2000
[16]尹长川.罗涛.乐光新编著.多载波宽带无线通信技术.北京邮电大学出版社.2004
[17]李栋编著.数字声音广播.第一版.北京.北京广播学院出版社.2001.7
[18]幸芦笙.陈宇新.DAB编码调制与单频同步网的实现.电声技术.1998.1
[19]佟学俭.罗涛编著.OFDM移动通信技术原理与应用.第一版.人民邮电出版社.2003.6
[20]罗建军主编.杨琦副主编.MATLAB教程.第一版.北京.电子工业出版社.2005.7
[21]王立宁.乐光新.詹菲编著.MATLAB与通信仿真.人民邮电出版社.2000.1
[22]尹泽明.丁春利等编著.精通MATLAB 6.清华大学出版社.2002年6月
[23]Walter Tuttlebee 主编.杨小牛.邹少丞.楼才义.赖兰剑译.软件无线电技术和实现.第一版.北京,电子工业出版社.2004.6
[24]Jeffrey H.Reed等著.陈强等译.软件无线电--无线电工程的现代方法.第一版.北京.人民邮电出版社.2004.7
[25]姜宇柏.游思晴等编著.软件无线电原理与工程应用.第一版.北京.机械工业出版社.2007.1
[24]《TMS320C6416 Data Sheet》.Texas Instruments incorporated.2003-04
[25]李方慧.王飞.何佩琨编著.TMS320C6000系列DSPs原理及应用.第2版.电子工业出版社.2003年1月
[26]TMS320C6000 CPU and Instruction Set Reference Guide,Texas Instruments Incorporated,2000
[27]清源科技编著.TMS320C54xDSP应用程序设计教程.第一版.北京.机械工业出版社.2004.1
[28]江思敏.刘畅主编.TMS320C6000DSP应用开发教程.第一版.北京.机械工业出版社.2005.2
[29]彭启踪.管庆编著.DSP集成开发环境--CCS及DSP/BIOS的原理与应用.第一版.北京. 电子工业出版社.2004.7
[30]伍坚.基于数字中频技术的OFDM收发信机研究与实现.北京交通大学硕士学位论文,2006
[31]曾繁泰.陈美金著.VHDL程序设计.第二版.北京.清华大学出版社.2001.2
[32]李洪伟.袁斯华编著.基于Quartus Ⅱ的FPGA/CPLD设计.第一版.电子工业出版社.2006.4
[33]John G.Proakis著.张力军.张宗橙.郑宝玉等译.数字通信.第四版.电子工业出版社.2006.1
[34]冯玉珉编著.通信系统原理.第一版.清华大学出版社.北方交通大学出版社.2003.6
[35]《AD9857 Data Sheet》.Analog Devices inc.2001
[36]胡斌编著.图表细说元器件及实用电路.第一版.北京.电子工业出版社.2005.9
[37]高鹏.安涛.寇怀成编著.电路设计与制版--Protel 99入门与提高.第一版.人民邮电出版社.2003.7