基于星上连续波时分复用的扩频通系系统研究
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摘要
本文研究一种具有一定抗干扰能力的卫星通信系统，它是根据一项中国发明专利的思想、采用星上FDMA-CWTDM(频分多址—连续波时分复用)转换和扩频技术构成无中心网状网的一种卫星通信新体制。这种体制既能回避星上处理设备复杂度高、功耗大的难题，又能支持多种卫星通信业务，简化地面站设备，还能为卫星通信系统灵活地进行组网带来方便。
在深入研究星上FDMA-CWTDM转换新方法和学习扩频通信原理的基础上，结合具体的系统参数，本文提出了面向扩频通信卫星应用FDMA-CWTDM转换的解决方案，具体展开了以下几个方面的研究：
1．深入研究了多相阵列FFT分路算法，基于正交采样原理对算法进行了改进。提出了一种适于硬件实现的FFT分路模块解决方案。
2．结合实际系统提出了32路CWTDM模块的实现方案。针对CWTDM模块的关键问题一频偏对帧同步的影响，作了深入的理论分析和仿真，进而提出了实际系统的时分分接同步解决方法。
3．深入研究了支持FDMA-CWTDM转换的扩频通信系统，提出了支持该系统的扩频接收机的实现方案。
4．选择系统级动态仿真软件Elanix System View，对设计的系统进行了仿真，同时开发了许多专用和通用的控件，为基于FDMA-CWTDM转换的扩频通信系统的硬件实现打下了良好的基础。
This thesis researches on a new scheme of satellite communication with anti-jamming ability, which is a system based on onboard FDMA-CWTDM (Continuous Wave Time Division Multiplex) conversion according to the idea of a Chinese patent and spread spectrum technique to constitute a mesh network. This scheme can not only avoid the challenging resulted from the complexity of on-board processing, but also support various services for satellite communications. Moreover, it is also convenient for networking.
Researching in depth on the new method of on-board FDMA-CWTDM conversion and spread spectrum technique, and considering possible military demand, the thesis puts forward a practical design scheme applied to the satellite spread spectrum communication, and finish some work about the related details and implementation simulation as follows:
1. Based on thorough studying of the Multiphase Array FFT De-multiplex Algorithm, the algorithm is improved by using the Orthogonal Sampling Principle, and further a implementation scheme which can benefit its hardware design is proposed.
2. The practical sketch of CWTDM is brought forward in view of real instance. In research on de-multiplexing of CWTDM signals, the trouble resulted from frequency bias is studied in depth, thanking to which a synchronization module for De-CWTDM is advanced.
3. Deeply studying the Spread Spectrum Communication Principle, the thesis designs a receiver scheme specially for this communication system.
4. With a dynamic system design tool, System View by Elanix, many custom tokens for general and special usage is developed, which would be helpful to the hardware implementation of the research result.
在深入研究星上FDMA-CWTDM转换新方法和学习扩频通信原理的基础上，结合具体的系统参数，本文提出了面向扩频通信卫星应用FDMA-CWTDM转换的解决方案，具体展开了以下几个方面的研究：
1．深入研究了多相阵列FFT分路算法，基于正交采样原理对算法进行了改进。提出了一种适于硬件实现的FFT分路模块解决方案。
2．结合实际系统提出了32路CWTDM模块的实现方案。针对CWTDM模块的关键问题一频偏对帧同步的影响，作了深入的理论分析和仿真，进而提出了实际系统的时分分接同步解决方法。
3．深入研究了支持FDMA-CWTDM转换的扩频通信系统，提出了支持该系统的扩频接收机的实现方案。
4．选择系统级动态仿真软件Elanix System View，对设计的系统进行了仿真，同时开发了许多专用和通用的控件，为基于FDMA-CWTDM转换的扩频通信系统的硬件实现打下了良好的基础。
This thesis researches on a new scheme of satellite communication with anti-jamming ability, which is a system based on onboard FDMA-CWTDM (Continuous Wave Time Division Multiplex) conversion according to the idea of a Chinese patent and spread spectrum technique to constitute a mesh network. This scheme can not only avoid the challenging resulted from the complexity of on-board processing, but also support various services for satellite communications. Moreover, it is also convenient for networking.
Researching in depth on the new method of on-board FDMA-CWTDM conversion and spread spectrum technique, and considering possible military demand, the thesis puts forward a practical design scheme applied to the satellite spread spectrum communication, and finish some work about the related details and implementation simulation as follows:
1. Based on thorough studying of the Multiphase Array FFT De-multiplex Algorithm, the algorithm is improved by using the Orthogonal Sampling Principle, and further a implementation scheme which can benefit its hardware design is proposed.
2. The practical sketch of CWTDM is brought forward in view of real instance. In research on de-multiplexing of CWTDM signals, the trouble resulted from frequency bias is studied in depth, thanking to which a synchronization module for De-CWTDM is advanced.
3. Deeply studying the Spread Spectrum Communication Principle, the thesis designs a receiver scheme specially for this communication system.
4. With a dynamic system design tool, System View by Elanix, many custom tokens for general and special usage is developed, which would be helpful to the hardware implementation of the research result.
引文
[1]易克初．带限信号时分复用传输方法．中国发明专利[981128467]．1999年6月公布，2001年授权
[2]樊昌信，詹道庸，徐炳祥等．通信原理．国防工业出版社，1994．
[3]沈振元，聂志泉，赵雪荷．通信系统原理．西安电子科技大学出版社，1993．
[4]胡广书．数字信号处理—理论、算法与实现．清华大学出版社，1998．
[5]R.E克劳切，L.R拉宾纳．多抽样率数字信号处理．人民邮电出版社，1988．
[6]丁玉美，高西全，彭学愚．数字信号处理．西安电子科技大学出版社，1994．
[7]Elanix Inc..System View 4.5 User's Guide,2000.
[8]Elanix Inc..A Guide to the FPGA Architect-Xilinx XC4000/Spartan,2000.
[9]P.M. Bakken,et.al.Multi-carrier Demodulator(MCD) using Analog and Digital Signal Processing,1988.
[10]B.Y.U. Online Course ECEn444, Dealing with Phase Ambiguities lectures for（?） 1999 VI.
[11]h.J.Meel Spread Spectrum Introduction, "Spread spectrum (SS) --An Introduction".
[12]Marvin K.Simon,Jim K.Omura,Robert A.Scholtz,and Barry K.Levitt,Spread Spectrum Communications HandBook,McGraw-Hill,1994.
[13]Christopher Ke Hong Deng.A Burst Mode PN Acquisition Processor for Direct Sequence Spread-Spectrum,A thesis for the degree Master of Science in Electrical Engineering of UCLA,1998.
[14]Fakhrul Alam.Simulation of Third Generation CDMA Systems.a thesis for the degree Master Of Science in Electrical Engineering of Virginia Polytechnic Institute & State University,1999.
[15]Yuanbin Guo. Modeling Of Welkin RF In A DSSS System For WCDMA Applications.Rice University ELEC 599 Report,2000.
[16]lan Smith,et al.Spread Spectrum Modem. Mississippi State University ECE 4512 technical report, 2000.
[17]Michael Hosemann et al,A Code Tracking Technique for Direct Sequence Spread Speetrum...
[18]Kyoohyun,Seughee Choit.Optimal Loop Bandwidth Design for Low Noise PLL Applications. IEEE Journal of Solid-State Circuits,VOL.35, NO.8, August 2000
[19]Brian D.Woerner.EE 5654-Digital Communications of Virginia Tech,Spring 2001
[20]Matt Loy.Understanding and Enhancing Sensitivity in Receivers for Wireless Applications.Texas Instruments,May 1999.
[21]Laurent Schumacher.About Maximum-likelihood Phase estimation In DS-CDMA System,Dec. 1999.
[22]Yimin Jiang.Synchronization and Parameter Estimation in Wireless Communication.UMD PH.D thesis,2000.
[23]Josie Ammer & Mike Sheets.Timing Recovery Unit for a 1.6 Mbps DSSS Receiver.UCLA EE225C Final Report,December 2000.
[24]Diakoumis Gerakoulis.CDMA: Access and Switch For Terrestrial and Satellite Networks.John Wiley & Sons Ltd,2001.
[25]Intel co.,STEL-2000A Data Sheet, 1999.
[26]Microsoft Corporation.Win32程序员参考大全(一)、(二)、(三)、(四)、(五)．清华大学出版社，1995．
[27]曾兴雯，郭峰，刘乃安等．频率偏移对SAWTDL相关特性的影响．西安电子科技大学学报，1998．
[28]易克初，庞治华，谷春燕．略论卫星通信抗干扰的策略，全国军事通信抗干扰年会，2001，10．
[29]庞治华，田斌，易克初．System View自定义控件的实现．计算机工程与设计，已录用．
[30]Marshall Brian,Lance Lovette.MFC开发人员指南．机械工业出版社，1999，2．
[31]田红心，李建军，易克初．全数字化多路FDMA／QPSK调制解调系统的实现．微波与卫星通信，第7卷第4期．
[32]司德锁、田红心、刘强等．用TMS320C6x实现2~M路QPSK数字化整体解调算法研究．电子学报，2000，1．
[33]林岚．Matcom:Matlab与C++结合的有效途径，matlab.363.net
[34]周德锁，星上多载波QPSK数字化解调关键技术研究．西安电子科技大学博士学位论文，2000，1．
[35]李建军．星上多载波FDMA／QPSK调制解调及其DSP实现．西安电子科技大学硕士学位论文，1999，1．
[36]刘强．星上处理FDMA／TDM分接复接技术及其DSP实现．西安电子科技大学硕士学位论文，1999，1．
[2]樊昌信，詹道庸，徐炳祥等．通信原理．国防工业出版社，1994．
[3]沈振元，聂志泉，赵雪荷．通信系统原理．西安电子科技大学出版社，1993．
[4]胡广书．数字信号处理—理论、算法与实现．清华大学出版社，1998．
[5]R.E克劳切，L.R拉宾纳．多抽样率数字信号处理．人民邮电出版社，1988．
[6]丁玉美，高西全，彭学愚．数字信号处理．西安电子科技大学出版社，1994．
[7]Elanix Inc..System View 4.5 User's Guide,2000.
[8]Elanix Inc..A Guide to the FPGA Architect-Xilinx XC4000/Spartan,2000.
[9]P.M. Bakken,et.al.Multi-carrier Demodulator(MCD) using Analog and Digital Signal Processing,1988.
[10]B.Y.U. Online Course ECEn444, Dealing with Phase Ambiguities lectures for（?） 1999 VI.
[11]h.J.Meel Spread Spectrum Introduction, "Spread spectrum (SS) --An Introduction".
[12]Marvin K.Simon,Jim K.Omura,Robert A.Scholtz,and Barry K.Levitt,Spread Spectrum Communications HandBook,McGraw-Hill,1994.
[13]Christopher Ke Hong Deng.A Burst Mode PN Acquisition Processor for Direct Sequence Spread-Spectrum,A thesis for the degree Master of Science in Electrical Engineering of UCLA,1998.
[14]Fakhrul Alam.Simulation of Third Generation CDMA Systems.a thesis for the degree Master Of Science in Electrical Engineering of Virginia Polytechnic Institute & State University,1999.
[15]Yuanbin Guo. Modeling Of Welkin RF In A DSSS System For WCDMA Applications.Rice University ELEC 599 Report,2000.
[16]lan Smith,et al.Spread Spectrum Modem. Mississippi State University ECE 4512 technical report, 2000.
[17]Michael Hosemann et al,A Code Tracking Technique for Direct Sequence Spread Speetrum...
[18]Kyoohyun,Seughee Choit.Optimal Loop Bandwidth Design for Low Noise PLL Applications. IEEE Journal of Solid-State Circuits,VOL.35, NO.8, August 2000
[19]Brian D.Woerner.EE 5654-Digital Communications of Virginia Tech,Spring 2001
[20]Matt Loy.Understanding and Enhancing Sensitivity in Receivers for Wireless Applications.Texas Instruments,May 1999.
[21]Laurent Schumacher.About Maximum-likelihood Phase estimation In DS-CDMA System,Dec. 1999.
[22]Yimin Jiang.Synchronization and Parameter Estimation in Wireless Communication.UMD PH.D thesis,2000.
[23]Josie Ammer & Mike Sheets.Timing Recovery Unit for a 1.6 Mbps DSSS Receiver.UCLA EE225C Final Report,December 2000.
[24]Diakoumis Gerakoulis.CDMA: Access and Switch For Terrestrial and Satellite Networks.John Wiley & Sons Ltd,2001.
[25]Intel co.,STEL-2000A Data Sheet, 1999.
[26]Microsoft Corporation.Win32程序员参考大全(一)、(二)、(三)、(四)、(五)．清华大学出版社，1995．
[27]曾兴雯，郭峰，刘乃安等．频率偏移对SAWTDL相关特性的影响．西安电子科技大学学报，1998．
[28]易克初，庞治华，谷春燕．略论卫星通信抗干扰的策略，全国军事通信抗干扰年会，2001，10．
[29]庞治华，田斌，易克初．System View自定义控件的实现．计算机工程与设计，已录用．
[30]Marshall Brian,Lance Lovette.MFC开发人员指南．机械工业出版社，1999，2．
[31]田红心，李建军，易克初．全数字化多路FDMA／QPSK调制解调系统的实现．微波与卫星通信，第7卷第4期．
[32]司德锁、田红心、刘强等．用TMS320C6x实现2~M路QPSK数字化整体解调算法研究．电子学报，2000，1．
[33]林岚．Matcom:Matlab与C++结合的有效途径，matlab.363.net
[34]周德锁，星上多载波QPSK数字化解调关键技术研究．西安电子科技大学博士学位论文，2000，1．
[35]李建军．星上多载波FDMA／QPSK调制解调及其DSP实现．西安电子科技大学硕士学位论文，1999，1．
[36]刘强．星上处理FDMA／TDM分接复接技术及其DSP实现．西安电子科技大学硕士学位论文，1999，1．
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