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Volume 27 Issue 10
Oct.  2005
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Zhou En, Chen Mao-mao, Wang Wen-bo. A Synchronization Algorithm for OFDM Based System in Multipath Fading Channels[J]. Journal of Electronics & Information Technology, 2005, 27(10): 1625-1629.
Citation: Zhou En, Chen Mao-mao, Wang Wen-bo. A Synchronization Algorithm for OFDM Based System in Multipath Fading Channels[J]. Journal of Electronics & Information Technology, 2005, 27(10): 1625-1629.

A Synchronization Algorithm for OFDM Based System in Multipath Fading Channels

  • Received Date: 2004-04-15
  • Rev Recd Date: 2004-08-25
  • Publish Date: 2005-10-19
  • In this paper, a novel synchronization algorithm is proposed for OFDM based system in multipath fading channels. In order to mitigate the effect of the multipath, the length of the correlation window is adapted according to the channel maximum time delay estimated in the fore frame. And the further fine synchronization is completed using the multipath information estimated in current frame. Simulation results demonstrate that the synchronization performances are improved greatly compared with the conventional methods. And the method is much suitable for the OFDM time synchronization in multipath fading channel environment.
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  • Schmidl T M, Cox D C. Robust frequency and timing synchronization for OFDM[J].IEEE Trans. on Communications.1997, 45(12):1613-1621[2]Kim Y H, Hahm Y K, Jung H J, et al.. An efficient frequency offset estimator for timing and frequency synchronization in OFDM systems. IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Aug. 1999: 580-583.[3]Ramasubramanian K, Baum K. An OFDM timing recovery scheme with inherent delay-spread estimation. IEEE GLOBECO' 01. Nov. 2001, Vol.5: 3111-3115.[4]Van de Beek J J, Sandell M, Borjesson P O. ML estimation of time and frequency offset in OFDM systems[J].IEEE Trans. on Signal Processing.1997, 45(7):1800-1805[5]Van de Beek J J, Sandell M, Isaksson M, et al.. Low-complex frame synchronization in OFDM systems. IEEE International Conference on Universal Personal Communications, Nov. 1995: 982-986.[6]Landstrom D, Wilson S K, vande Beek J J, et al.. Symbol time offset estimation in coherent OFDM systems[J].IEEE Trans. on Communications.2002, 50(4):545-549[7]Van de Beek J J, Borjesson P O, Boucheret M L, et al.. Three non-pilot based time and frequency estimators for OFDM[J].Signal Processing.2000, 80(7):1321-1334[8]Hsieh M H, Wei C H. A low-complexity frame synchronization and frequency offset compensation scheme for OFDM systems over fading channels[J].IEEE Trans. on Vehicular Technology.1999, 48(9):1596-1609[9]Atarashi Hiroyuki, Abeta Sadayuki, Sawahashi Mamoru. Pilot channel assisted MMSE combining in forward link for broadband[10]OFCDM packet wireless access. IEICE Trans. on Fundamentals of Electronics, Communications and Computer Sciences, July 2002: 1635-1647.[11]邝育军, 候晓林, 乐光新. 无线弥散信道下OFDM系统中时间同步方案的比较分析. 北京邮电大学学报, 2003, 26(3): 75-80.[12]王文博, 郑侃. 宽带无线通信OFDM技术. 北京: 人民邮电出版社, 2003: 63-77.
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