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OFDM在电力线通信中的同步技术 被引量：3

Technique of synchronization in OFDM systems for powerline communications
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摘要 研究了电力线上OFDM通信中的同步技术。利用OFDM信号模型,分析了各种同步误差的来源。并且针对使用电力线作为传输媒介实现逆变电源间通信的要求,着重对符号同步和载波同步算法进行研究,并在原有的ML(MaximumLikelihood)算法上进行了改进。从仿真结果看,此改进算法能够明显改善同步的性能。 This paper considers aspects of synchronising an OFDM system for powerline communications. A comprehensive analytical model of the demodulated signal in the receiver is derived, including all errors introduced by synchronization mismatch. This paper principally studies on the technique of symbol synchronization and carrier synchronization according to the characteristics of the powerline channel and the requests of the communications of the distributed Inverters on the powerline.The reformative method regarding ML as the foundation is proven appropriate method of synchronization by the simulation.
作者 姜江 吴长奇 艾艳锦
机构地区 燕山大学信息工程学院
出处 《信息技术》 2004年第3期16-19,共4页 Information Technology
关键词 OFDM 同步 电力线通信 循环前缀 OFDM synchronization power line communications cyclic prefix
分类号 TN914 [电子电信—通信与信息系统]
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参考文献6

  • 1[1]So Ra Park, Young Ho Jung. Low-Complexity Symbol Timing Offset Estimation Schemes for OFDM Systems[J], ETRI Journal, 2002,24(3).
  • 2[2]Uf Tureli, Krishna Madhavan Pillai and Rajesh Ambati. Performance comparison of OFDM Carrier synchronization algorithms with Diversity[C], 2003 Conference on Information Sciences and Systems, The Johns Hopkins University, March 12-14, 2003.
  • 3[3]B Yang, Z Ma, and Z Cao. ML-Oriented DA Sampling Clock Synchronization for OFDM Systems[C]. IEEE on International Conference, 2000,(1):781-784.
  • 4[4]F Classen & H Meyr. Frequency Synchronization Algorithms for OFDM Systems Suitable for Communication over Frequency Selective fading Channels[C].Proc.IEEE Vehicular Technology Conf., 1994,1655-1659.
  • 5[5]P Moose. A technique for orthogonal frequency division multiplexing frequency offset correction[C]. IEEE Trans.On Communications,1994,42(10):2908-2914.
  • 6[6]M Zimmermann, K Dostert. A Multi-Path Signal Propagation Model for the Power Line Channel in the High Frequency Range[C]. Proceedings of the 3rd International Symposium on Power-Line Communications, Lancaster, 1999,30(3):45-51.

同被引文献10

  • 1李引凡.OFDM技术及其关键技术[J].现代电子技术,2005,28(7):25-27. 被引量：10
  • 2罗春风,程时杰,熊兰,文劲宇,张有兵,杨慧敏.低压电力线OFDM载波通信系统符号定时同步方法[J].电力系统自动化,2005,29(9):65-71. 被引量：12
  • 3John G.Proakis.数字通信[M].4版.北京:电子工业出版社,2003.
  • 4Burak.Power Line Modem with E-meter Platform.White Paper,February,2004.
  • 5MANFRED Z, KLAUS D. A multilipath model for the power line channel [ J ]. IEEE Trans Commun, 2002, 50(4) :553 -559.
  • 6MANFRED Z, KLAUS D. Analysis and modeling of implusive noise in broad-band powerline communications [ J ]. IEEE Trans Electromagnetic Compatibility, 2002, 44( 1 ) :249 -258.
  • 7TIMOTHY M,,DONALD C C. Robust frequency and timing synchronization for OFDM [ J ]. IEEE Trans Commun, 1997, 45(12): 1 613-1 621.
  • 8Jan-Jaap van de Beek, Magnus Sandell Per Ola Borjesson. ML estimation of time and frequency offset in OFDM system[J]. IEEE Trans Sig Proc, Jul, 1997,45 (7) :1 800-1 805.
  • 9赵云峰,汪晓岩,徐立中,赵明宇.低压电力线噪声分析与建模[J].电力系统通信,2003,24(1):31-34. 被引量：27
  • 10顾礼荣,赵姚同.基于导频的OFDM信道估计方法及分析[J].电视技术,2004,28(2):7-8. 被引量：5

引证文献3

信息技术
2004年 第3期

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