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一種基于頻域相關(guān)實現(xiàn)OFDM時頻同步的方法

劉俊琳,  鄧單,  朱近康,  邱玲

劉俊琳, 鄧單, 朱近康, 邱玲. 一種基于頻域相關(guān)實現(xiàn)OFDM時頻同步的方法[J]. 電子與信息學(xué)報, 2006, 28(8): 1354-1359.
引用本文: 劉俊琳, 鄧單, 朱近康, 邱玲. 一種基于頻域相關(guān)實現(xiàn)OFDM時頻同步的方法[J]. 電子與信息學(xué)報, 2006, 28(8): 1354-1359.
Liu Jun-lin, Deng Dan, Zhu Jin-kang, Qiu Ling. OFDM Time and Frequency Synchronization Based on Frequency Domain Correlation[J]. Journal of Electronics & Information Technology, 2006, 28(8): 1354-1359.
Citation: Liu Jun-lin, Deng Dan, Zhu Jin-kang, Qiu Ling. OFDM Time and Frequency Synchronization Based on Frequency Domain Correlation[J]. Journal of Electronics & Information Technology, 2006, 28(8): 1354-1359.

一種基于頻域相關(guān)實現(xiàn)OFDM時頻同步的方法

OFDM Time and Frequency Synchronization Based on Frequency Domain Correlation

  • 摘要: 該文根據(jù)頻域相關(guān)的原理，提出了一種新的用于無線移動信道下的正交頻分復(fù)用(OFDM)系統(tǒng)的時頻同步算法。該算法能夠同時實現(xiàn)時間同步與頻偏估計。該算法設(shè)計了一個長為一個OFDM信元的前綴信元，使用在頻率域相關(guān)的方法來實現(xiàn)初始時間同步。該算法利用時間同步的相關(guān)結(jié)果以及匹配相關(guān)的原理實現(xiàn)初始頻偏估計，并且能夠?qū)⒊跏碱l偏估計的估計范圍擴(kuò)展到整個OFDM的系統(tǒng)帶寬。仿真結(jié)果表明，在高斯信道與衰落信道下，該算法具有良好時頻同步性能。
    Abstract: A new time and frequency synchronization method based on frequency domain correlation for an Orthogonal Frequency Division Multiplexing (OFDM) system is presented. The time synchronization and carrier frequency offset estimation can be achieved simultaneously. The algorithms described here use one training sequence of just one symbol and the design of the symbol is presented. The carrier offset estimation can be got by the correlation result of time synchronization and the frequency synchronization algorithm can extend the frequency acquisition range to nearly the whole useful OFDM signal bandwidth. The efficacy of the synchronization algorithms is demonstrated experimentally.
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  • Bingham J A C. Multicarrier modulation for data transmission：An ideal whose time has come[J].IEEE Commun. Mag.1990, 28(5):5-[2]Zou W Y, Wu Y. COFDM: An overview. IEEE Trans. on Broadcasting, 1995, 41(1): 18.[3]Cimini L J, Li Y. Orthogonal frequency division multiplexing for wireless channel. IEEE Globecom98, Sydney Australia, November 8-12 1998, Tutorial Presentation.[4]Hiroshi Nogami, Toshio Nagashima. A frequency and timing period acquisition technique for mobile communication. PIMRC95，Toronto, September 27-29 1995: 10101015..[5]Giovanni Santella. A frequency and symbol synchronization system for OFDM signals: Architecture and simulation results. IEEE Trans. on Veh. Technology，2000, 49(1): 254275.[6]Schmidl T M, Cox D C. Robust frequency and timing synchronization for OFDM. IEEE Trans. on Communications，1997, 45(12): 16131621.[7]Alan J Coulson. Maximum likelihood synchronization for OFDM using a pilot symbol: algorithms. IEEE J. on Selected Areas on Communications，2001, 19(12): 24862494.
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出版歷程
  • 收稿日期:  2004-11-24
  • 修回日期:  2005-08-11
  • 刊出日期:  2006-08-19

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