COFDM技术运用于高压电力线高速载波通信传输模块的DSP实现
摘要
40kHz～500kHz频带内进行载波通信是电力系统运行、控制和管理的一种重要工具。随着近年电力事业的迅猛发展，电力系统对实时监控的要求越来越高，特别是无人值守变电站的兴起，发电厂、变电站、中心调度之间需要大量语音、远动、图像、保护信息的交换，因而对电力通信提出了更高要求。利用新的调制技术升级改造传统的单边带(SSB)载波机势在必行。
本文提出将以OFDM为主调制、RS为外码、TCM为内码的集联编码作为信道编码的COFDM(编码的正交频分复用)调制技术运用于高压电力线载波通信中，分析了将该技术运用于高压电力载波通信的优势。基于COFDM调制技术的载波机使用数据压缩、数据编码等技术处理信号，再经过OFDM调制，耦合到电力线上传输高频信号，在接受端恢复信号。通过理论计算和模拟，在现行的高压电力载波频带内，可以达到1.5Mbps以上的数据通信速率。相比传统高压电力线载波机，它可以提供更高的频谱利用率、更快的通信速度、更好的抗信道衰落性能以及更高的可靠性。利用COFDM调制模块直接对现有载波机进行技术升级、改造，更换原先单边带调制模块，这种办法可充分利用现有装置，节约大量资金。本文就COFDM调制手段应用于高压电力线载波通信给出了较为详细的分析，并且给出了系统参数设定。
OFDM的调制和解调等效于IDFT(离散傅立叶反变换)和DFT(离散傅立叶变换)，使用DSP(数字信号处理器)完成傅式运算有着MCU无法比拟的优势。本文提出了基于16位定点DSP-TMS320VC5410的调制模块的设计方案，单片DSP在符号周期内实现了整个调制系统的绝大部分算法，它提供了相当高的性价比。在RS编译码环节采用了ALTERA公司提供的IP(知识产权)核技术予以实现，明显缩短了开发时间，而可靠性也得到了保证。在本设计中，还大量使用了CPLD(复杂可编程逻辑器件)作为控制器件。这样得以减少大量逻辑器件，系统的集成度得到了很大提高，可靠性也得到了提升。在本文的最后部分给出了整个系统的软件设计，并且对软件实现的几个关键问题给予了详细说明。
长期以来阻碍电力系统实时监控自动化进程的主要因素就是高速、可靠的信息数据的通信问题。本文提出的将COFDM作为核心调制技术运用于载波通信，能大幅提高通信速度、降低误码率、可靠性也得到了保证。也为更好的利用现有电
鑫武汉大学硕士学位论文
力载波系统做了有益的探索。
摘要
Power line carrier(PLC) communication in the frequency bandwidth between 40kHz and 500kHz is a very important facility of the Power System Control Operating & Management. With the rapid development of power system recently in China, especially a lot of nonattended transformer substations are springged up, a mass of voice, image, telecontrol and protection messages need be exchanged among power plants transformer substations and power dispatching center , which put forward higher request for the speed and reliability of the Power Communication. Using new modulation and upgrading existing carrier system is imperative under the situation, for traditional SSB(Single Sideband) carrier can't meet this request.
Coded orthogonal frequency division multiplexing(COFDM)modulation technology using in high voltage PLC is put forward in this paper. It is using OFDM as primary modulation, Outer Reed Solomon (RS) code concatenated with inner codes Trellis coded modulation (TCM) as channel coding, and analyzes the advantage of COFDM modulation technology exerting on power line communication. The power line carrier based on COFDM technology processes the original signal with data compression and data coding first of all, then modulates the signal through OFDM technology-it is the most important kernel part of COFDM modulation, and then transmits processed signal on the high voltage power line, last demodulates the signal according to opposite operation at the receive part. It can reach more than l.5Mbps data transmission speed in the available frequency band of existing power line carrier communication system by academic calculate and simulation. Comparing with the traditional power line carrier, it is provided with higher sp
ectral efficiency, higher transmission speed, robustness to channel fading, immunity to intersymbol interference (ISI) and other predominant capability. High speed communication on the high voltage power line can be realized by the new-style COFDM power line carrier. technology upgrade and amelioration to existing power line carrier by COFDM modulation technology just need substitute former SSB module, which makes full use of existing equipment. This method may save a lot of fund. COFDM using in the high voltage PLC is analyzed in detail, and system parameter is presented.
The modulation and demodulation of OFDM can be realized by inverse DFT(discrete Fourier transforms) and DFT, using digital signal processor(DSP) to accomplish Fourier calculation is much more convenient than by normal micro controller unit(MCU) Thus, the module design based on 16-bit fixed point DSP-TMS320VC5410 is put forward in this paper. Single DSP can realize most of the system algorithm in one code period, it supplies with high rate of performance and
price .Intellectual property (IP) core technology (RS complier MEGACORE function )of ALTERA company is exerted to this modulation system, which implements complex RS encoding and decoding . Research time is significantly reduced by inducting IP core technology, reliability and holistic performance of this system is exalted obviously at the same time. A lot of complex programmable logic devices(CPLD) using control devices are exerted in this system design. A great deal of logic devices are cut down, and the reliability is upgraded. Software design of this system is put forward at the article's last chapter, and sixty-four-dollar question of the software realization is also illuminated.
High speed and reliable communication is a pivotal question that counteracts Power system real-time watch automatization. COFDM using in the PLC which is put forward in this paper can improve communication speed greatly, and reduce BER, reliability is assured also. So the thesis will make beneficial contribution to make better use of existing PLC system
本文提出将以OFDM为主调制、RS为外码、TCM为内码的集联编码作为信道编码的COFDM(编码的正交频分复用)调制技术运用于高压电力线载波通信中，分析了将该技术运用于高压电力载波通信的优势。基于COFDM调制技术的载波机使用数据压缩、数据编码等技术处理信号，再经过OFDM调制，耦合到电力线上传输高频信号，在接受端恢复信号。通过理论计算和模拟，在现行的高压电力载波频带内，可以达到1.5Mbps以上的数据通信速率。相比传统高压电力线载波机，它可以提供更高的频谱利用率、更快的通信速度、更好的抗信道衰落性能以及更高的可靠性。利用COFDM调制模块直接对现有载波机进行技术升级、改造，更换原先单边带调制模块，这种办法可充分利用现有装置，节约大量资金。本文就COFDM调制手段应用于高压电力线载波通信给出了较为详细的分析，并且给出了系统参数设定。
OFDM的调制和解调等效于IDFT(离散傅立叶反变换)和DFT(离散傅立叶变换)，使用DSP(数字信号处理器)完成傅式运算有着MCU无法比拟的优势。本文提出了基于16位定点DSP-TMS320VC5410的调制模块的设计方案，单片DSP在符号周期内实现了整个调制系统的绝大部分算法，它提供了相当高的性价比。在RS编译码环节采用了ALTERA公司提供的IP(知识产权)核技术予以实现，明显缩短了开发时间，而可靠性也得到了保证。在本设计中，还大量使用了CPLD(复杂可编程逻辑器件)作为控制器件。这样得以减少大量逻辑器件，系统的集成度得到了很大提高，可靠性也得到了提升。在本文的最后部分给出了整个系统的软件设计，并且对软件实现的几个关键问题给予了详细说明。
长期以来阻碍电力系统实时监控自动化进程的主要因素就是高速、可靠的信息数据的通信问题。本文提出的将COFDM作为核心调制技术运用于载波通信，能大幅提高通信速度、降低误码率、可靠性也得到了保证。也为更好的利用现有电
鑫武汉大学硕士学位论文
力载波系统做了有益的探索。
摘要
Power line carrier(PLC) communication in the frequency bandwidth between 40kHz and 500kHz is a very important facility of the Power System Control Operating & Management. With the rapid development of power system recently in China, especially a lot of nonattended transformer substations are springged up, a mass of voice, image, telecontrol and protection messages need be exchanged among power plants transformer substations and power dispatching center , which put forward higher request for the speed and reliability of the Power Communication. Using new modulation and upgrading existing carrier system is imperative under the situation, for traditional SSB(Single Sideband) carrier can't meet this request.
Coded orthogonal frequency division multiplexing(COFDM)modulation technology using in high voltage PLC is put forward in this paper. It is using OFDM as primary modulation, Outer Reed Solomon (RS) code concatenated with inner codes Trellis coded modulation (TCM) as channel coding, and analyzes the advantage of COFDM modulation technology exerting on power line communication. The power line carrier based on COFDM technology processes the original signal with data compression and data coding first of all, then modulates the signal through OFDM technology-it is the most important kernel part of COFDM modulation, and then transmits processed signal on the high voltage power line, last demodulates the signal according to opposite operation at the receive part. It can reach more than l.5Mbps data transmission speed in the available frequency band of existing power line carrier communication system by academic calculate and simulation. Comparing with the traditional power line carrier, it is provided with higher sp
ectral efficiency, higher transmission speed, robustness to channel fading, immunity to intersymbol interference (ISI) and other predominant capability. High speed communication on the high voltage power line can be realized by the new-style COFDM power line carrier. technology upgrade and amelioration to existing power line carrier by COFDM modulation technology just need substitute former SSB module, which makes full use of existing equipment. This method may save a lot of fund. COFDM using in the high voltage PLC is analyzed in detail, and system parameter is presented.
The modulation and demodulation of OFDM can be realized by inverse DFT(discrete Fourier transforms) and DFT, using digital signal processor(DSP) to accomplish Fourier calculation is much more convenient than by normal micro controller unit(MCU) Thus, the module design based on 16-bit fixed point DSP-TMS320VC5410 is put forward in this paper. Single DSP can realize most of the system algorithm in one code period, it supplies with high rate of performance and
price .Intellectual property (IP) core technology (RS complier MEGACORE function )of ALTERA company is exerted to this modulation system, which implements complex RS encoding and decoding . Research time is significantly reduced by inducting IP core technology, reliability and holistic performance of this system is exalted obviously at the same time. A lot of complex programmable logic devices(CPLD) using control devices are exerted in this system design. A great deal of logic devices are cut down, and the reliability is upgraded. Software design of this system is put forward at the article's last chapter, and sixty-four-dollar question of the software realization is also illuminated.
High speed and reliable communication is a pivotal question that counteracts Power system real-time watch automatization. COFDM using in the PLC which is put forward in this paper can improve communication speed greatly, and reduce BER, reliability is assured also. So the thesis will make beneficial contribution to make better use of existing PLC system
引文
[1]戚银城，尚秋峰，等．电力线载波技术的现状及发展．华北电力大学学报．2001(1)
[2]潘莹玉．电力线载波通信的现状分析．电网技术．1998(2)
[3]张智勇，周国正．电力线载波通信数字化进程及标准．电力系统通信．2001(5)
[4]姜少杰．DSP在电力线载波通信中的应用．电力系统通信．1997(5)
[5]张仁永，等．电力线载波通道设备应用指南．中国电力出版社．2002
[6]IEC Publication 663. Planning of power line carrier systems. International Electrotechnical Commission. 1980 (2)
[7]中华人民共和国国家标准GB／T 7255-1998．单边带电力线载波机．国家技术监督局．1998
[8]殷小贡，刘涤尘．电力系统通信工程．武汉水利电力大学出版社．2000
[9]施育华．输电线载波通道．中国电力出版社．1997
[10]秦国屏．载波通信原理．中国电力出版社．1998
[11]樊昌信，徐炳祥，等．通信原理．国防工业出版社．2001
[12]张辉，曹丽娜．现代通信原理与技术．西安电子科技大学出版社．2002
[13]袁世仁．电力线载波通信．中国电力出版社．1998
[14]李卓青．对电力线载波通信设备今后发展的设想．电力系统通信．1998(2)
[15]孙凤杰，杨维娜．数字式电力线载波机．中国电力．1997(7)
[16]王奎甫，李卫民，薛民．数字式载波机调制方法的探讨．1998(6)
[17]陈道元．A．C．E．32新一代数字式电力线载波机．电力系统通信．1996(5)
[18]马迁，胡爱群，等．数字载波机信号处理模块的实现方案．电力系统通信．2001(7)
[19]刘华玲，张保会，刘海涛．扩频通信、OFDM调制技术及其在电力线通信中的应用分析．继电器．2001(11)
[20]李斯伟，张建超．正交频分复用(OFDM)的原理及应用．中国民航学院学报．1999(10)
[21]W. Y. Zou and Y. Wu. COFDM: An overview. IEEE Trans. Broadcast. Mar. 1995
[22]S.B.Weinstein and P.M.Ebert. Data transmission by frequency-division
multiplexing using the discrete Fourier transform. IEEE Transactions on Communication. Vol 19. 1971
[23]Intellon Corporation. White Paper #0032: OFDM communication primer March. 1999
[24]李伟，孟繁茂，王兴亮．正交频分复用技术及应用研究．现代电子技术2002(2)
[25]姚轶，邵军力．利用OFDM技术在低压电力线上实现高速数据传输．电力系统自动化．2001(8)
[26]张华，侯春萍．运用仿真进行OFDM性能的研究．天津工业大学学报．2002(2)
[27]金旗，裴昌幸，张振生．OFDM技术的基本原理．通信技术．2002(6)
[28]John G. Prokis. Digital Communications Fourth Edition. Mc Graw Hill Press.2001
[29]Yun Hee Kim. A Coded OFDM System For Time-varying Multipath Rayleigh Fading Environment. IEEE Tr. Comm. Vol33. 1997
[30]宫剑，贾怀义．OFDM技术及其仿真性能分析．铁道学报．2002(6)
[31]解勇，李兵兵．高清晰度电视OFDM．电子科技．2001(7)
[32]王金龙，沈良，等．无线通信系统的DSP实现．人民邮电出版社．2002
[33]陈长德，刘海涛，张保会．OFDM调制技术在宽带高速电力线通信中的应用．电力系统自动化．2001(9)
[34]梅剑平，全子一．基于COFDM的HDTV传输系统方案．电路与系统学报．1996(3)
[35]Huang Zhiping Li Peng and Zhong Xiaopeng, The Achievement of Viterbi Decoder Based on Trellis Coded Modulation, Electron Quality, 2001(12)
[36]G.Ungerboeck. Trellis Coded Modulation with redundant signal sets-part 1 :Introduction. IEEE Commun. Vol25. Feb. 1987
[37]G.Ungerboeck. Trellis Coded Modulation with redundant signal sets-part 2:Introduction. IEEE Commun. Vol25. Feb. 1987
[38]Qi Wang and Lei Wei. Iterative Viterbi Decoding, Trellis Shaping, and Multilevel Structure for High-Rate Parity-Concatenated TCM. IEEE Tra comm. Vol50. January 2002
[39]欧志明．RS码的一种新的译码算法．北京邮电大学学报 1994(4)
[40]S.R.Blackbum. Shift Register Synthesis and BCH Decoding. IEEE Trans on
Inform Theory. Vol IT15. 1969
[41]王华，肖建明，匡镜明．RS码和P-TCM级联性能．北京理工大学学报．1999(1)
[42]艾渤，葛建华，王勇．数字视频广播COFDM系统传输方案．西部广播电视．2002(9)
[43]李引新，赵姚同．正交频分多路(OFDM)的实现方式及性能分析．电讯技术．1998(12)
[44]张雄伟，曹铁勇．DSP芯片的原理与开发应用(第二版)．电子工业出版社 2000
[45]王念旭等．DSP基础与应用系统设计．北京航天航空大学出版社．2002
[46]汪安民．TMS320C54XX DSP实用技术．清华大学出版社．2002
[47]Texas Instruments. TMS320VC5410 Fixed-Point Digital Signal Processor. Literature Number : SPRS075E. 2000
[48]戴明桢，周建江．TMS320C54X DSP结构、原理及应用．北京航天航空大学出版社．2002
[49]Texas Instruments. TMS320C54X DSP Reference Set Volume 1: CPU and Peripherals. 1999
[50]Altera. Reed-Solomon Compiler User Guide document version 3.33 rev 1. 2003
[51]Altera. APEX20K Programmable Logic Device Family Data Sheet. 2002
[52]Maxim. Up Compatible CMOS 14-bit D/A Converter MX7538 Data Sheet. 1997
[53]Maxim. Pin Programmable Precision Voltage Reference MX584. 1996
[54]黄正谨，徐坚，章小丽等．CPLD系统设计技术入门与应用．电子工业出版社．2002
[55]Analog Devices. Complete 14-bit 1.25MSPS Monolithic A/D Converter AD9241. 1997
[56]IDT. High-Speed 4K* 16 Dual-Port Static RAM IDT7024S 2000
[57]Altera. MAX 7000 Programmable Logic Device Family Data Sheet. 2002
[58]李华．MCS-51系列单片机实用接口技术．北京航天航空大学出版社．2001
[59]刘益成．TMS320C54X DSP应用程序与开发．北京航天航空大学出版社．2002
[60]郑红，吴冠．TMS320C54X DSP应用系统设计．北京航天航空大学出版社．2002
[61]Texas Instruments. TMS320C54X DSP Reference Set Volume 2: Mnemonic Instruction. 1999
[62]Texas Instruments. TMS320C54X DSP Reference Set Volume 3: Algebraic Instruction. 1999
[63]倪亮，赵正予．基于DSP的电力线载波OFDM调制解调器．电子技术应用．2002(11)
[63]Texas Instruments. TMS320C5410 Bootloader. Spra609B. 2002
[64]刘惠，林海虹．TMS320VC5410的BOOT设计与实现．电子技术应用．2002(6)
[65]SST. 4Mbit (* 16) Multi-Purpose Flash SST39VF400A Data Sheet. 2001
[66]聂晓华，姜建国．基于闪烁存储器的TMS320VC5409 DSP并行引导装载方法．电子技术应用．2002(7)
[67]公茂忠，刘汉奎，徐殿国．FLASH存储器的在系统编程及其在DSP系统中的应用．电子技术应用．2002(3)
[68]A.D.S Jayalath.C Tellambura. Reducing the peak-to-average power ratio of orthogonal frequency division multiplexing signal through bit or symbol interleaving. Electronic Letters. Vol 36. 2000(6)
[69]房海东，杨知行，潘长勇．一种降低正交频分复用峰均功率比的方法．电讯技术．2001(5)
[70]束锋，刘毅峰，罗琳，吴乐南．正交频分复用通信系统的联合同步算法．应用科学学报．2001(12)
[2]潘莹玉．电力线载波通信的现状分析．电网技术．1998(2)
[3]张智勇，周国正．电力线载波通信数字化进程及标准．电力系统通信．2001(5)
[4]姜少杰．DSP在电力线载波通信中的应用．电力系统通信．1997(5)
[5]张仁永，等．电力线载波通道设备应用指南．中国电力出版社．2002
[6]IEC Publication 663. Planning of power line carrier systems. International Electrotechnical Commission. 1980 (2)
[7]中华人民共和国国家标准GB／T 7255-1998．单边带电力线载波机．国家技术监督局．1998
[8]殷小贡，刘涤尘．电力系统通信工程．武汉水利电力大学出版社．2000
[9]施育华．输电线载波通道．中国电力出版社．1997
[10]秦国屏．载波通信原理．中国电力出版社．1998
[11]樊昌信，徐炳祥，等．通信原理．国防工业出版社．2001
[12]张辉，曹丽娜．现代通信原理与技术．西安电子科技大学出版社．2002
[13]袁世仁．电力线载波通信．中国电力出版社．1998
[14]李卓青．对电力线载波通信设备今后发展的设想．电力系统通信．1998(2)
[15]孙凤杰，杨维娜．数字式电力线载波机．中国电力．1997(7)
[16]王奎甫，李卫民，薛民．数字式载波机调制方法的探讨．1998(6)
[17]陈道元．A．C．E．32新一代数字式电力线载波机．电力系统通信．1996(5)
[18]马迁，胡爱群，等．数字载波机信号处理模块的实现方案．电力系统通信．2001(7)
[19]刘华玲，张保会，刘海涛．扩频通信、OFDM调制技术及其在电力线通信中的应用分析．继电器．2001(11)
[20]李斯伟，张建超．正交频分复用(OFDM)的原理及应用．中国民航学院学报．1999(10)
[21]W. Y. Zou and Y. Wu. COFDM: An overview. IEEE Trans. Broadcast. Mar. 1995
[22]S.B.Weinstein and P.M.Ebert. Data transmission by frequency-division
multiplexing using the discrete Fourier transform. IEEE Transactions on Communication. Vol 19. 1971
[23]Intellon Corporation. White Paper #0032: OFDM communication primer March. 1999
[24]李伟，孟繁茂，王兴亮．正交频分复用技术及应用研究．现代电子技术2002(2)
[25]姚轶，邵军力．利用OFDM技术在低压电力线上实现高速数据传输．电力系统自动化．2001(8)
[26]张华，侯春萍．运用仿真进行OFDM性能的研究．天津工业大学学报．2002(2)
[27]金旗，裴昌幸，张振生．OFDM技术的基本原理．通信技术．2002(6)
[28]John G. Prokis. Digital Communications Fourth Edition. Mc Graw Hill Press.2001
[29]Yun Hee Kim. A Coded OFDM System For Time-varying Multipath Rayleigh Fading Environment. IEEE Tr. Comm. Vol33. 1997
[30]宫剑，贾怀义．OFDM技术及其仿真性能分析．铁道学报．2002(6)
[31]解勇，李兵兵．高清晰度电视OFDM．电子科技．2001(7)
[32]王金龙，沈良，等．无线通信系统的DSP实现．人民邮电出版社．2002
[33]陈长德，刘海涛，张保会．OFDM调制技术在宽带高速电力线通信中的应用．电力系统自动化．2001(9)
[34]梅剑平，全子一．基于COFDM的HDTV传输系统方案．电路与系统学报．1996(3)
[35]Huang Zhiping Li Peng and Zhong Xiaopeng, The Achievement of Viterbi Decoder Based on Trellis Coded Modulation, Electron Quality, 2001(12)
[36]G.Ungerboeck. Trellis Coded Modulation with redundant signal sets-part 1 :Introduction. IEEE Commun. Vol25. Feb. 1987
[37]G.Ungerboeck. Trellis Coded Modulation with redundant signal sets-part 2:Introduction. IEEE Commun. Vol25. Feb. 1987
[38]Qi Wang and Lei Wei. Iterative Viterbi Decoding, Trellis Shaping, and Multilevel Structure for High-Rate Parity-Concatenated TCM. IEEE Tra comm. Vol50. January 2002
[39]欧志明．RS码的一种新的译码算法．北京邮电大学学报 1994(4)
[40]S.R.Blackbum. Shift Register Synthesis and BCH Decoding. IEEE Trans on
Inform Theory. Vol IT15. 1969
[41]王华，肖建明，匡镜明．RS码和P-TCM级联性能．北京理工大学学报．1999(1)
[42]艾渤，葛建华，王勇．数字视频广播COFDM系统传输方案．西部广播电视．2002(9)
[43]李引新，赵姚同．正交频分多路(OFDM)的实现方式及性能分析．电讯技术．1998(12)
[44]张雄伟，曹铁勇．DSP芯片的原理与开发应用(第二版)．电子工业出版社 2000
[45]王念旭等．DSP基础与应用系统设计．北京航天航空大学出版社．2002
[46]汪安民．TMS320C54XX DSP实用技术．清华大学出版社．2002
[47]Texas Instruments. TMS320VC5410 Fixed-Point Digital Signal Processor. Literature Number : SPRS075E. 2000
[48]戴明桢，周建江．TMS320C54X DSP结构、原理及应用．北京航天航空大学出版社．2002
[49]Texas Instruments. TMS320C54X DSP Reference Set Volume 1: CPU and Peripherals. 1999
[50]Altera. Reed-Solomon Compiler User Guide document version 3.33 rev 1. 2003
[51]Altera. APEX20K Programmable Logic Device Family Data Sheet. 2002
[52]Maxim. Up Compatible CMOS 14-bit D/A Converter MX7538 Data Sheet. 1997
[53]Maxim. Pin Programmable Precision Voltage Reference MX584. 1996
[54]黄正谨，徐坚，章小丽等．CPLD系统设计技术入门与应用．电子工业出版社．2002
[55]Analog Devices. Complete 14-bit 1.25MSPS Monolithic A/D Converter AD9241. 1997
[56]IDT. High-Speed 4K* 16 Dual-Port Static RAM IDT7024S 2000
[57]Altera. MAX 7000 Programmable Logic Device Family Data Sheet. 2002
[58]李华．MCS-51系列单片机实用接口技术．北京航天航空大学出版社．2001
[59]刘益成．TMS320C54X DSP应用程序与开发．北京航天航空大学出版社．2002
[60]郑红，吴冠．TMS320C54X DSP应用系统设计．北京航天航空大学出版社．2002
[61]Texas Instruments. TMS320C54X DSP Reference Set Volume 2: Mnemonic Instruction. 1999
[62]Texas Instruments. TMS320C54X DSP Reference Set Volume 3: Algebraic Instruction. 1999
[63]倪亮，赵正予．基于DSP的电力线载波OFDM调制解调器．电子技术应用．2002(11)
[63]Texas Instruments. TMS320C5410 Bootloader. Spra609B. 2002
[64]刘惠，林海虹．TMS320VC5410的BOOT设计与实现．电子技术应用．2002(6)
[65]SST. 4Mbit (* 16) Multi-Purpose Flash SST39VF400A Data Sheet. 2001
[66]聂晓华，姜建国．基于闪烁存储器的TMS320VC5409 DSP并行引导装载方法．电子技术应用．2002(7)
[67]公茂忠，刘汉奎，徐殿国．FLASH存储器的在系统编程及其在DSP系统中的应用．电子技术应用．2002(3)
[68]A.D.S Jayalath.C Tellambura. Reducing the peak-to-average power ratio of orthogonal frequency division multiplexing signal through bit or symbol interleaving. Electronic Letters. Vol 36. 2000(6)
[69]房海东，杨知行，潘长勇．一种降低正交频分复用峰均功率比的方法．电讯技术．2001(5)
[70]束锋，刘毅峰，罗琳，吴乐南．正交频分复用通信系统的联合同步算法．应用科学学报．2001(12)
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