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一种基于短时傅里叶变换的OFDM时间同步方法

邝育军 乐光新

邝育军, 乐光新. 一种基于短时傅里叶变换的OFDM时间同步方法[J]. 电子与信息学报, 2004, 26(3): 453-458.
引用本文: 邝育军, 乐光新. 一种基于短时傅里叶变换的OFDM时间同步方法[J]. 电子与信息学报, 2004, 26(3): 453-458.
Kuang Yu-jun, Yue Guang-xin. A Short-Time Fourier Transform Based Symbol Timing Atpproach for OFDM Systems[J]. Journal of Electronics & Information Technology, 2004, 26(3): 453-458.
Citation: Kuang Yu-jun, Yue Guang-xin. A Short-Time Fourier Transform Based Symbol Timing Atpproach for OFDM Systems[J]. Journal of Electronics & Information Technology, 2004, 26(3): 453-458.

一种基于短时傅里叶变换的OFDM时间同步方法

A Short-Time Fourier Transform Based Symbol Timing Atpproach for OFDM Systems

  • 摘要: 该文提出了一种基于短时傅里叶变换的OFDM符号同步方法。该方法通过短时傅里叶变换得到OFDM信号的二维幅度谱,并提取其中的周期平稳时频结构信息,估计出OFDM符号的无ISI时间区间,并选取该区间的最佳位置作为OFDM符号起始位置估计。仿真结果表明:该方法相对于常规的时间相关算法能有效地对抗低信噪比环境。
  • Wei L, Schlegel C. Synchronization requirements for multiuser OFDM on satellite mobile and two path Rayleigh fading channels. IEEE Trans. on Communications, 1995, COM-43(2/3/4):887-895.[2]Pollet T, Moeneclaey M. Synchronizability of OFDM signals[J].In Proc. of GLOBECOM95,Singapore.1995, 3(9):2054-2058[3]Moose P H. A technique for orthogonal frequency division multiplexing frequency offset correction.IEEE Trans. on Communications, 1994, COM-42(10): 2908-2914.[4]Van De Beek J J, Sandel M, Borjesson P O. ML estimation of time and frequency offset in OFDM systems. IEEE Trans. on Signal Processing, 1997, SP-45(7): 1800-1805.[5]Johansson S, Landstrom D, Nilsson P. Silicon realization of an OFDM synchronization algorithm[J].Electronics, Circuits and Systems, Proc. of ICECS99, Pafos, Cyprus.1999, vol.1:319-322[6]Kuang Yujun, Yue Guangxin. On performance of time synchronization schemes for OFDM systems. Proc. of the International Conference of Telecommunications, Beijing, 2002, Vol.2: 720-724.[7]va Nee R, Prasad R. OFDM Wireless Multimedia Communications, New York: Artech House,1999: 73-79.[8]Dusan Matic, Ton A J, Coenen R M. OFDM timing synchronization: possibilities and limits to the usage of the cyclic prefix for maximum likelihood estimation. VTC99, Amsterdam, Netherlands,1999: 668-672.[9]Jun Wu, Qun Zhou, Cheng K K M. The adaptive algorithm of symbol timing and carrier phase estimation in OFDM systems. ICC 2001, IEEE International Conference on Comm., Helsinki,Finland, 2001, Vol.1: 156-160.[10]Ramasubramanian K, Baum K. An OFDM timing recovery scheme with inherent delay-spread estimation[J].Global Telecommunications Conference, San Antonio, TX, USA, GLOBECOM01,IEEE.2001, Vol.5:3111-3115
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出版历程
  • 收稿日期:  2002-09-24
  • 修回日期:  2003-03-10
  • 刊出日期:  2004-03-19

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