扩频测控系统信号处理技术
|
摘要
扩频技术是目前信息领域迅猛发展的一门前沿技术，它从军事通信开始，已应用到导航、测量、遥控等多个技术领域，正迅速的向个人通信和计算机通信渗透。
本文主要讨论扩频测控系统的实现技术。首先介绍了扩频通信和扩频测控系统的基本理论，讨论了扩频系统的伪码同步和跟踪问题。然后给出了数字化扩频测控系统的设计方案，并且分析和讨论了中频数字化技术、双码测速、测距方法等。其次，根据系统设计方案建立了相应的仿真模型，利用MATLAB设计完成了仿真程序，并且进行了计算机仿真验证。通过对仿真结果的分析，验证了设计方案的可行性。在仿真中发现，系统频率误差和多普勒频偏的存在会导致解调出错。因此，在改进的仿真模型中，采用科斯塔斯环来完成载波频率的同步，最终得到了正确的解扩和解调结果。
As an advanced technology, spread spectrum technology grows rapidly nowadays. It started from military communication and got involved into navigation, measurement, remote control fields and so on. Right now it gets closer and deeper to personal and computer communications.
The paper mainly discusses the realization technology of measure and control system using spread spectrum method. Firstly, the principles of spread spectrum communication and measure and control system using spread spectrum method are introduced and those problems of code synchronization and tracking are deeply discussed. After that, the design scheme of digitization measure and control system using spread spectrum method is provided and then intermediate frequency digitization technology, distance and speed measurement methods of double codes are discussed and analyzed. Next, according to system request, the corresponding simulation system model is established. The simulated program is completed by MATLAB and validated by computer simulation. The feasibility of the design scheme is validated through the analysis of simulation result. During simulation process, mistakes could be possibly made cause of system frequency error and Doppler frequency shift. As a solution COSTAS is used in the improved simulation model to complete the synthesis of the frequency of the carrier and in the end the correct demodulation and dispread spectrum results are made.
本文主要讨论扩频测控系统的实现技术。首先介绍了扩频通信和扩频测控系统的基本理论，讨论了扩频系统的伪码同步和跟踪问题。然后给出了数字化扩频测控系统的设计方案，并且分析和讨论了中频数字化技术、双码测速、测距方法等。其次，根据系统设计方案建立了相应的仿真模型，利用MATLAB设计完成了仿真程序，并且进行了计算机仿真验证。通过对仿真结果的分析，验证了设计方案的可行性。在仿真中发现，系统频率误差和多普勒频偏的存在会导致解调出错。因此，在改进的仿真模型中，采用科斯塔斯环来完成载波频率的同步，最终得到了正确的解扩和解调结果。
As an advanced technology, spread spectrum technology grows rapidly nowadays. It started from military communication and got involved into navigation, measurement, remote control fields and so on. Right now it gets closer and deeper to personal and computer communications.
The paper mainly discusses the realization technology of measure and control system using spread spectrum method. Firstly, the principles of spread spectrum communication and measure and control system using spread spectrum method are introduced and those problems of code synchronization and tracking are deeply discussed. After that, the design scheme of digitization measure and control system using spread spectrum method is provided and then intermediate frequency digitization technology, distance and speed measurement methods of double codes are discussed and analyzed. Next, according to system request, the corresponding simulation system model is established. The simulated program is completed by MATLAB and validated by computer simulation. The feasibility of the design scheme is validated through the analysis of simulation result. During simulation process, mistakes could be possibly made cause of system frequency error and Doppler frequency shift. As a solution COSTAS is used in the improved simulation model to complete the synthesis of the frequency of the carrier and in the end the correct demodulation and dispread spectrum results are made.
引文
[1] 朱近康．CDMA测控技术．北京：人民邮电出版社 2001
[2] 杨廷善，苏长莱，梁恺．航空测控系统实用手册．北京：航空工业出版社 1997
[3] 曾兴雯，刘乃安．扩展频谱通信及其多址技术．西安：西安电子科技大学出版社 2004
[4] 樊昌信，詹道庸，徐炳祥等．通信原理．北京：国防工业出版社 1995
[5] 周智敏，李企舜．现代航空测控原理．北京：国防工业出版社 1998
[6] 杨小牛，楼才义，徐建良．软件无线电原理与应用．北京：电子工业出版社 2001
[7] 曹志刚，钱亚生．现代通信原理．北京：清华大学出版社 1992
[8] 王秉钧，孙学军，王少勇等．现代通信系统原理．天津：天津大学出版社
[9] Jerrold A.HELLER and IRWIN MARK JACOBS,"Viterbi Decoding for satellite and Space Communication",IEEE TRANSACTIONS ON COMMUNICATION TECHNOLOGY,VOL.COM-19,NO.5 October 1971
[10] 查光明，熊贤祚．扩频通信．西安：西安电子科技大学出版社 1997
[11] Theodore S.Rappaport ,"Wireless Communication Principles and Practice"1998
[12] 胡广书．数字信号处理．北京：清华大学出版社 1997
[13] 侯伯亨，顾新．VHDL硬件描述语言与数字逻辑电路设计．西安：西安电子科技大学出版社 1997
[14] 李承恕，赵荣黎．扩展频谱通信．北京：人民邮电出版社 1993
[15] 朱近康．扩展频谱通信及其应用．安徽：中国科学技术大学出版社 1993
[16] [美]R．C．狄克逊 箸 王守仁，项海格，迟惠生 译．扩展频谱系统．北京：国防工业出版社 1982
[17] Baines S, Burr A, Tozer T. Adative architecture for signal separation and interference suppression in DS-CDMA system. Electron Lett. 1996,32:1057～1058
[18] John G.. Proakis ,"Digital Communication", Fourth Edition, Oct.2001
[19] Bar-Ness Y ,Punt J. An improved multi-user CDMA decorrelating detector. In: Proc. Int. Symp .Personal, Indoor and Mobile Radio Communications 1995
[20] 陈雪松，滕立中．VHDL入门及应用．北京：人民邮电出版社 2000
[21] 姜立东．VHDL语言程序设计及应用．北京：北京邮电大学出版社 2001
[22] Poor H V, Wang X. Code-aided interference suppression for DS/CDMA communications----Part Ⅱ: Parallel blind adaptive implementations. IEEE Trans- Commun., 1998
[23] 刘敏，魏玲．MATLAB通信仿真与应用．北京：国防工业出版社 2001
[24] 王立宁，乐光新，詹菲．MATLAB与通信仿真．北京：人民邮电出版社 2000
[25] 陈怀琛，吴大正，高西全．MATLAB及在电子信息课程中的应用．北京：电子工业出版社 2003
[26] Feher K. Wireless Digital Communications. Prentice Hall,1995
[27] KLAR.B. 《Digital Communication》 Prentice Hall 1988 Bernard Sklar 箸 《数字通信—基础与应用》徐平平 宋铁成等译．北京：电子工业出版社
[28] 赵曙光，郭万有，杨松华．可编程逻辑器件原理、开发与应用．西安：西安电子科技大学出版社 2000
[29] 丁玉美，高西全．数字信号处理．西安：西安电子科技大学出版社 2001。
[30] 刘雅娟．直接序列扩频通信伪码同步的研究．无线电通信技术，1997年第25卷第一期
[31] 孙娇燕．锁相环频率捕捉过程的计算机辅助设计．大连海运学院学报 1997年 第20卷 第三期
[32] Marvin .K .Simom Jim. K. Omura ,Robert .A .Scholtz, Barry .K. Levitt. Spread Spectrum Communications Handbook.北京:人民邮电出版社.2002
[33] 狄京，张申，庄乾启等．基于CPLD的锁相位同步信号提取技术．工矿自动化 2004年 第五期
[34] Chen D S,Roy S,An adaptine multiuser receiver for CDMA systema, IEEE J.Select.Areas Commun,1994,12:808～816
[35] Poor H V, Wang X. Code-aided interference suppression for DS/CDMA communications----Part Ⅱ: Parallel blind adaptive implementations. IEEE Trans. Commun. 1998, 45:1112～1122
[36] A.J.Verbit. CDMA 扩频通信原理. 1997.p37～46
[2] 杨廷善，苏长莱，梁恺．航空测控系统实用手册．北京：航空工业出版社 1997
[3] 曾兴雯，刘乃安．扩展频谱通信及其多址技术．西安：西安电子科技大学出版社 2004
[4] 樊昌信，詹道庸，徐炳祥等．通信原理．北京：国防工业出版社 1995
[5] 周智敏，李企舜．现代航空测控原理．北京：国防工业出版社 1998
[6] 杨小牛，楼才义，徐建良．软件无线电原理与应用．北京：电子工业出版社 2001
[7] 曹志刚，钱亚生．现代通信原理．北京：清华大学出版社 1992
[8] 王秉钧，孙学军，王少勇等．现代通信系统原理．天津：天津大学出版社
[9] Jerrold A.HELLER and IRWIN MARK JACOBS,"Viterbi Decoding for satellite and Space Communication",IEEE TRANSACTIONS ON COMMUNICATION TECHNOLOGY,VOL.COM-19,NO.5 October 1971
[10] 查光明，熊贤祚．扩频通信．西安：西安电子科技大学出版社 1997
[11] Theodore S.Rappaport ,"Wireless Communication Principles and Practice"1998
[12] 胡广书．数字信号处理．北京：清华大学出版社 1997
[13] 侯伯亨，顾新．VHDL硬件描述语言与数字逻辑电路设计．西安：西安电子科技大学出版社 1997
[14] 李承恕，赵荣黎．扩展频谱通信．北京：人民邮电出版社 1993
[15] 朱近康．扩展频谱通信及其应用．安徽：中国科学技术大学出版社 1993
[16] [美]R．C．狄克逊 箸 王守仁，项海格，迟惠生 译．扩展频谱系统．北京：国防工业出版社 1982
[17] Baines S, Burr A, Tozer T. Adative architecture for signal separation and interference suppression in DS-CDMA system. Electron Lett. 1996,32:1057～1058
[18] John G.. Proakis ,"Digital Communication", Fourth Edition, Oct.2001
[19] Bar-Ness Y ,Punt J. An improved multi-user CDMA decorrelating detector. In: Proc. Int. Symp .Personal, Indoor and Mobile Radio Communications 1995
[20] 陈雪松，滕立中．VHDL入门及应用．北京：人民邮电出版社 2000
[21] 姜立东．VHDL语言程序设计及应用．北京：北京邮电大学出版社 2001
[22] Poor H V, Wang X. Code-aided interference suppression for DS/CDMA communications----Part Ⅱ: Parallel blind adaptive implementations. IEEE Trans- Commun., 1998
[23] 刘敏，魏玲．MATLAB通信仿真与应用．北京：国防工业出版社 2001
[24] 王立宁，乐光新，詹菲．MATLAB与通信仿真．北京：人民邮电出版社 2000
[25] 陈怀琛，吴大正，高西全．MATLAB及在电子信息课程中的应用．北京：电子工业出版社 2003
[26] Feher K. Wireless Digital Communications. Prentice Hall,1995
[27] KLAR.B. 《Digital Communication》 Prentice Hall 1988 Bernard Sklar 箸 《数字通信—基础与应用》徐平平 宋铁成等译．北京：电子工业出版社
[28] 赵曙光，郭万有，杨松华．可编程逻辑器件原理、开发与应用．西安：西安电子科技大学出版社 2000
[29] 丁玉美，高西全．数字信号处理．西安：西安电子科技大学出版社 2001。
[30] 刘雅娟．直接序列扩频通信伪码同步的研究．无线电通信技术，1997年第25卷第一期
[31] 孙娇燕．锁相环频率捕捉过程的计算机辅助设计．大连海运学院学报 1997年 第20卷 第三期
[32] Marvin .K .Simom Jim. K. Omura ,Robert .A .Scholtz, Barry .K. Levitt. Spread Spectrum Communications Handbook.北京:人民邮电出版社.2002
[33] 狄京，张申，庄乾启等．基于CPLD的锁相位同步信号提取技术．工矿自动化 2004年 第五期
[34] Chen D S,Roy S,An adaptine multiuser receiver for CDMA systema, IEEE J.Select.Areas Commun,1994,12:808～816
[35] Poor H V, Wang X. Code-aided interference suppression for DS/CDMA communications----Part Ⅱ: Parallel blind adaptive implementations. IEEE Trans. Commun. 1998, 45:1112～1122
[36] A.J.Verbit. CDMA 扩频通信原理. 1997.p37～46