π-4-DQPSK调制解调算法设计及DSP实现
|
摘要
软件无线电技术是近年来提出的一种实现无线通信的新的体系结构。它的基本概念是把硬件作为无线通信的基本平台,而把尽可能多的无线通信及个人通信功能用软件实现。这样无线通信新系统、新产品的开发将逐步转到软件上来,而无线通信的产品价值将越来越多地体现在软件上。这是无线通信领域继固定到移动、模拟到数字之后的第三次革命,并将在下个世纪形成和计算机及程控交换相当的巨大产业。
本课题来源于与公司的合作项目——铁路安全监控数据高速移动接入系统,属于其中的软件无线电信号处理部分。其功能是在AD公司的DSP硬件平台上用软件实现一路36Kbps数据的π/4-DQPSK调制解调处理。本文首先介绍π/4-DQPSK调制解调算法中各个模块的实现原理,如:成形滤波、差分解调、位同步,然后介绍作者的具体工作,包括算法的MATLAB性能仿真以及在DSP硬件平台上的系统测试。
作者的工作主要包括:
1.查阅大量文献,深入了解π/4-DQPSK调制解调原理并在此基础上形成具体的算法。
2.利用MATLAB对π/4-DQPSK调制解调算法进行性能仿真,验证算法的可行性。
3.在VISUAL DSP环境下编写汇编程序并进行软仿真。
4.结合DSP评估板ADSP-21161N EZKIT LITE 对整个调制解调系统进行硬件测试实验。
Software defined radio (SDR) technology is put forward in resent years as a new system structure applied to wireless communication. Its basic concept is to implement as many as possible communication functions with software technology on a universal hardware platform. Then, the development of new system and new product are transferred from hardware to software. And the relevant value of wireless communication product depends more on software. From this viewpoint, SDR technology is called the third revolution in wireless communication field followed digital communication and mobile communication.
This subject is the signal processing part of SDR system which belongs to a cooperative project----High-speed data transfer access system on monitoring railway security----with a company. The major task is to accomplish a π/4-DQPSK software modem whose bit rate is 36kbps on a ADSP hardware platform. In this paper ,the theory of π/4-DQPSK modem ,such as pulse shaping filter ,differential demodulation and bit synchronization are first introduced. Then author’s job is described in detail, including algorithm simulation within MATLAB and the modem system test on a DSP emulator.
The following tasks are performed by the author:
1.Consulting lots of references and form a full algorithm about π/4-DQPSK software modem.
2.Simulating the whole modem algorithm within MATLAB, validating its feasibility.
3.Writing assembly program in VISUAL DSP and checking the validity of program.
4.Testing the whole modem system on ADSP-21161N EZKIT LITE.
本课题来源于与公司的合作项目——铁路安全监控数据高速移动接入系统,属于其中的软件无线电信号处理部分。其功能是在AD公司的DSP硬件平台上用软件实现一路36Kbps数据的π/4-DQPSK调制解调处理。本文首先介绍π/4-DQPSK调制解调算法中各个模块的实现原理,如:成形滤波、差分解调、位同步,然后介绍作者的具体工作,包括算法的MATLAB性能仿真以及在DSP硬件平台上的系统测试。
作者的工作主要包括:
1.查阅大量文献,深入了解π/4-DQPSK调制解调原理并在此基础上形成具体的算法。
2.利用MATLAB对π/4-DQPSK调制解调算法进行性能仿真,验证算法的可行性。
3.在VISUAL DSP环境下编写汇编程序并进行软仿真。
4.结合DSP评估板ADSP-21161N EZKIT LITE 对整个调制解调系统进行硬件测试实验。
Software defined radio (SDR) technology is put forward in resent years as a new system structure applied to wireless communication. Its basic concept is to implement as many as possible communication functions with software technology on a universal hardware platform. Then, the development of new system and new product are transferred from hardware to software. And the relevant value of wireless communication product depends more on software. From this viewpoint, SDR technology is called the third revolution in wireless communication field followed digital communication and mobile communication.
This subject is the signal processing part of SDR system which belongs to a cooperative project----High-speed data transfer access system on monitoring railway security----with a company. The major task is to accomplish a π/4-DQPSK software modem whose bit rate is 36kbps on a ADSP hardware platform. In this paper ,the theory of π/4-DQPSK modem ,such as pulse shaping filter ,differential demodulation and bit synchronization are first introduced. Then author’s job is described in detail, including algorithm simulation within MATLAB and the modem system test on a DSP emulator.
The following tasks are performed by the author:
1.Consulting lots of references and form a full algorithm about π/4-DQPSK software modem.
2.Simulating the whole modem algorithm within MATLAB, validating its feasibility.
3.Writing assembly program in VISUAL DSP and checking the validity of program.
4.Testing the whole modem system on ADSP-21161N EZKIT LITE.
引文
[1] Kamilo Feher. Modems for Emerging Digital Cellular-Mobile Radio System. IEEE Transactions on vehicular technology,vol.40,No.2,May 1991,pp.355-365
[2] Sandeep Chennakeshu,G.J.Saulnier. Differential detection of π/4-shifted-DQPSK for digital cellular radio. 41st IEEE Vehicular Technology Conference, 1991. 'Gateway to the Future Technology in Motion', 19-22 May 1991,pp.186-191
[3] Jeong Eun Lee,Seung Hee Choi,Beomsup Kim.Basedband clock recovery algorithm for π/4-qpsk modulated signals. Vehicular Technology Conference,1997 IEEE. Vol.3,47th ,4-7 May 1997 ,pp. 1729 -1733
[4] Floyd M.,Gardner. A BPSK/QPSK timing error detector for sampled receivers. IEEE Transaction on Communications,1986,COM-34(5),pp.423~429
[5] D-Z.Liu and C-H.Wei.A Digital Timing Recovery Scheme for TDMA Digital Mobile Radio. Proceedings of the 1996 IEEE International Symposium on Circuits and Systems ,Vol.1, Atlanta,USA,May,12-15 1996, pp.152-154,
[6] Der-Zheng Liu,Che-Ho Wei.Synchronization scheme in non-coherent demodulator for TDMA digital mobile radio system. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems, 1999. ISCAS '99. Vol. 4 ,?30 May-2 June 1999 ,pp.463 - 466
[7] Steven H.Goode,Henry L.Kazecki,Donald W.Dennis.A comparison of limiter-discriminator,delay and coherent detection for π/4-qpsk. Vehicular Technology Conference, 1990 IEEE 40th ,?6-9 May 1990 pp.687 - 694
[8] Ging-Shing Liu,Che-Ho Wei.Timing recovery techniques for digital cellular radio with π/4- DQPSK modulation. IEEE International Conference on Communications, 1992. ICC 92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications. vol.1, 14-18 June 1992, pp.319 - 323
[9] Hyuck M.Kwon,Ali Haghnegahdar. π/4-DQPSK signal with baseband zero-crossing demodulator. Global Telecommunications Conference, 1997. GLOBECOM '97, IEEE, Vol. 1 ,?3-8 Nov,1997 .pp.353 – 357
[10] Chang Jiang,Zhang Nai tong.A New Signal Processing Techinque of π/4- DQPSK Modem Based on Software Radio.Journal of Systems Engineering and Electronics,Vol.14,No.2,2003,pp.20-24
[11] Beomsup Kim,Jun Mo Koo,Joonsuk Lee ,etc. Non-Data-Aided Timing Recovery Algorithm for π/4- QPSK Modulated signals. IEEE International Conference on Communications. Vol. 1,18-22 June 2000, pp.392 - 396
[12] Stephan Weiss,Steve J.Braithwaite,R.David Stewart.Softwareπ/4-DQPSK Modem:A student project using the TMS320C6201 EVM Board.
[13] Christopher Gerald Santos,Ian Wong,Alvin Manlapat,etc.Design and implementation of a π/4-DQPSK modem for broadband wireless access.
[14] Leonard E.Miller, Senior Member.BER Expressions for Differentially Detected π/4-DQPSK Modulation.IEEE Transactions on communication,Vol.46, No.1,January 1998,pp.71-81
[15] Victor Fung, Theodore S.Rappaport.Bit-error simulation ofπ/4 DQPSK in flat and frequency-selective fading mobile radio channels with real time applications. IEEE International Conference on Communications ,23-26 June 1991, vol.2,pp.553 - 557
[16] J.Webber,N.Dahnoun.Implementing a π/4 shift D-QPSK baseband modem using the TMS320C50.ESIEE,Paris,September 1996.
[17] 郭悌云.数字移动通信.北京:人民邮电出版社.1995,pp.197-211
[18] 郑祖辉.数字集群移动通信系统.北京:电子工业出版社,2002,pp.159-167
[19] 赵杭生,甘仲民,屈德新.π/4-dqpsk调制的快速位同步捕获和位同步跟踪.电子学报.1999年第4期
[20] 张俊业.数字集群中的π/4- DQPSK调制技术.警察技术2001年第5期
[21] 祁玉生.数字移动通信中的π/4- DQPSK的基带差分解调.电信科学.1994年8月第10卷第8期
[22] 廖长清,卢建川,曾利.基于TMS320C54x实现π/4- DQPSK调制.电讯技术.2002年第1期
[23] 苏立国,刘振宇,卢刚等.π/4- DQPSK调制快速位定时捕获算法的DSP实现.电子技术应用.2001年第7期
[24] 杨喜根,童新海.π/4- DQPSK信号的一种新的解调方法.通信学报.2000年10月第21卷第10期
[25] 杨曙辉,李栋.DAB中的DQPSK调制技术特点.北京广播学院学报(自然科学版)1992-2(总27期)
[26] 樊平毅,冯重熙.窗函数在成形滤波器设计中的应用.通信学报.1996年3月第17卷第2期
[27] Analog Devices Inc. VISUALDSP++ 2.0 User’s Guide for ADSP-21xxx DSPs. (Third Revision, Part Number 82-001962-01).Digital Signal Processor Division One Technology Way Norwood,Mass,2001
[28] Analog Devices Inc.ADSP-21160 SHARC DSP Instruction Set Reference(First Edition ,Part Number 82-001944-01).Digital Signal Processor Division One Technology Way Norwood,Mass.1999
[29] Analog Devices Inc. VISUALDSP++ 2.0 Linker and Utilities Manual for ADSP-21xxxDSPs. (Third Revision ,Part Number 82-001965-01).Digital Signal Processor Division One Technology Way Norwood,Mass.2001
[30] Analog Devices Inc. VISUAL DSP++ 2.0 Assembler and Preprocessor Manual for ADSP-21xxx DSPs. (Third Revision ,Part Number 82-001964-01).Digital Signal Processor Division One Technology Way Norwood,Mass.2001
[31] Wentao Li. A DSP-Based π/4- DQPSK Modem:[Master thesis].University of Saskatchewan Saskatoon.1999
[32] Baker.P.A. Phase-modulation data sets for serial transmission at 2,000 and 2,400 bits per second .Part I, AIEE Trans.Commun Electron.July,1962,pp.166-171
[33] 付小宁.数字移动通信中的π/4-QPSK调制解调技术:[硕士学位论文].西安电子科技大学,1994年
[34] Rolando D.Navarro,Jr.,Christopher Gerald G.Santos,etc. Performance analysis of the Gardner timing detector overπ/4-DQPSK modulation.
[2] Sandeep Chennakeshu,G.J.Saulnier. Differential detection of π/4-shifted-DQPSK for digital cellular radio. 41st IEEE Vehicular Technology Conference, 1991. 'Gateway to the Future Technology in Motion', 19-22 May 1991,pp.186-191
[3] Jeong Eun Lee,Seung Hee Choi,Beomsup Kim.Basedband clock recovery algorithm for π/4-qpsk modulated signals. Vehicular Technology Conference,1997 IEEE. Vol.3,47th ,4-7 May 1997 ,pp. 1729 -1733
[4] Floyd M.,Gardner. A BPSK/QPSK timing error detector for sampled receivers. IEEE Transaction on Communications,1986,COM-34(5),pp.423~429
[5] D-Z.Liu and C-H.Wei.A Digital Timing Recovery Scheme for TDMA Digital Mobile Radio. Proceedings of the 1996 IEEE International Symposium on Circuits and Systems ,Vol.1, Atlanta,USA,May,12-15 1996, pp.152-154,
[6] Der-Zheng Liu,Che-Ho Wei.Synchronization scheme in non-coherent demodulator for TDMA digital mobile radio system. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems, 1999. ISCAS '99. Vol. 4 ,?30 May-2 June 1999 ,pp.463 - 466
[7] Steven H.Goode,Henry L.Kazecki,Donald W.Dennis.A comparison of limiter-discriminator,delay and coherent detection for π/4-qpsk. Vehicular Technology Conference, 1990 IEEE 40th ,?6-9 May 1990 pp.687 - 694
[8] Ging-Shing Liu,Che-Ho Wei.Timing recovery techniques for digital cellular radio with π/4- DQPSK modulation. IEEE International Conference on Communications, 1992. ICC 92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications. vol.1, 14-18 June 1992, pp.319 - 323
[9] Hyuck M.Kwon,Ali Haghnegahdar. π/4-DQPSK signal with baseband zero-crossing demodulator. Global Telecommunications Conference, 1997. GLOBECOM '97, IEEE, Vol. 1 ,?3-8 Nov,1997 .pp.353 – 357
[10] Chang Jiang,Zhang Nai tong.A New Signal Processing Techinque of π/4- DQPSK Modem Based on Software Radio.Journal of Systems Engineering and Electronics,Vol.14,No.2,2003,pp.20-24
[11] Beomsup Kim,Jun Mo Koo,Joonsuk Lee ,etc. Non-Data-Aided Timing Recovery Algorithm for π/4- QPSK Modulated signals. IEEE International Conference on Communications. Vol. 1,18-22 June 2000, pp.392 - 396
[12] Stephan Weiss,Steve J.Braithwaite,R.David Stewart.Softwareπ/4-DQPSK Modem:A student project using the TMS320C6201 EVM Board.
[13] Christopher Gerald Santos,Ian Wong,Alvin Manlapat,etc.Design and implementation of a π/4-DQPSK modem for broadband wireless access.
[14] Leonard E.Miller, Senior Member.BER Expressions for Differentially Detected π/4-DQPSK Modulation.IEEE Transactions on communication,Vol.46, No.1,January 1998,pp.71-81
[15] Victor Fung, Theodore S.Rappaport.Bit-error simulation ofπ/4 DQPSK in flat and frequency-selective fading mobile radio channels with real time applications. IEEE International Conference on Communications ,23-26 June 1991, vol.2,pp.553 - 557
[16] J.Webber,N.Dahnoun.Implementing a π/4 shift D-QPSK baseband modem using the TMS320C50.ESIEE,Paris,September 1996.
[17] 郭悌云.数字移动通信.北京:人民邮电出版社.1995,pp.197-211
[18] 郑祖辉.数字集群移动通信系统.北京:电子工业出版社,2002,pp.159-167
[19] 赵杭生,甘仲民,屈德新.π/4-dqpsk调制的快速位同步捕获和位同步跟踪.电子学报.1999年第4期
[20] 张俊业.数字集群中的π/4- DQPSK调制技术.警察技术2001年第5期
[21] 祁玉生.数字移动通信中的π/4- DQPSK的基带差分解调.电信科学.1994年8月第10卷第8期
[22] 廖长清,卢建川,曾利.基于TMS320C54x实现π/4- DQPSK调制.电讯技术.2002年第1期
[23] 苏立国,刘振宇,卢刚等.π/4- DQPSK调制快速位定时捕获算法的DSP实现.电子技术应用.2001年第7期
[24] 杨喜根,童新海.π/4- DQPSK信号的一种新的解调方法.通信学报.2000年10月第21卷第10期
[25] 杨曙辉,李栋.DAB中的DQPSK调制技术特点.北京广播学院学报(自然科学版)1992-2(总27期)
[26] 樊平毅,冯重熙.窗函数在成形滤波器设计中的应用.通信学报.1996年3月第17卷第2期
[27] Analog Devices Inc. VISUALDSP++ 2.0 User’s Guide for ADSP-21xxx DSPs. (Third Revision, Part Number 82-001962-01).Digital Signal Processor Division One Technology Way Norwood,Mass,2001
[28] Analog Devices Inc.ADSP-21160 SHARC DSP Instruction Set Reference(First Edition ,Part Number 82-001944-01).Digital Signal Processor Division One Technology Way Norwood,Mass.1999
[29] Analog Devices Inc. VISUALDSP++ 2.0 Linker and Utilities Manual for ADSP-21xxxDSPs. (Third Revision ,Part Number 82-001965-01).Digital Signal Processor Division One Technology Way Norwood,Mass.2001
[30] Analog Devices Inc. VISUAL DSP++ 2.0 Assembler and Preprocessor Manual for ADSP-21xxx DSPs. (Third Revision ,Part Number 82-001964-01).Digital Signal Processor Division One Technology Way Norwood,Mass.2001
[31] Wentao Li. A DSP-Based π/4- DQPSK Modem:[Master thesis].University of Saskatchewan Saskatoon.1999
[32] Baker.P.A. Phase-modulation data sets for serial transmission at 2,000 and 2,400 bits per second .Part I, AIEE Trans.Commun Electron.July,1962,pp.166-171
[33] 付小宁.数字移动通信中的π/4-QPSK调制解调技术:[硕士学位论文].西安电子科技大学,1994年
[34] Rolando D.Navarro,Jr.,Christopher Gerald G.Santos,etc. Performance analysis of the Gardner timing detector overπ/4-DQPSK modulation.