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一種適用于多徑衰落信道的OFDM系統(tǒng)同步算法

周恩 陳茅茅 王文博

周恩, 陳茅茅, 王文博. 一種適用于多徑衰落信道的OFDM系統(tǒng)同步算法[J]. 電子與信息學(xué)報(bào), 2005, 27(10): 1625-1629.
引用本文: 周恩, 陳茅茅, 王文博. 一種適用于多徑衰落信道的OFDM系統(tǒng)同步算法[J]. 電子與信息學(xué)報(bào), 2005, 27(10): 1625-1629.
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.

一種適用于多徑衰落信道的OFDM系統(tǒng)同步算法

A Synchronization Algorithm for OFDM Based System in Multipath Fading Channels

  • 摘要: 該文針對(duì)多徑衰落信道的具體特點(diǎn),提出了一種適用于無線衰落信道環(huán)境下的OFDM符號(hào)同步方法。此種方法利用前一幀估計(jì)的信道最大時(shí)延來調(diào)整相關(guān)窗長(zhǎng)度,在最大程度上避開了多徑的影響;并利用本幀信道估計(jì)得到的多徑信息進(jìn)一步完成符號(hào)精細(xì)同步。仿真證明,該方法比傳統(tǒng)的方法有較大的性能改善,比較適合多徑衰落信道環(huán)境下的符號(hào)定時(shí)同步。
  • 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]鄺育軍, 候曉林, 樂光新. 無線彌散信道下OFDM系統(tǒng)中時(shí)間同步方案的比較分析. 北京郵電大學(xué)學(xué)報(bào), 2003, 26(3): 75-80.[12]王文博, 鄭侃. 寬帶無線通信OFDM技術(shù). 北京: 人民郵電出版社, 2003: 63-77.
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出版歷程
  • 收稿日期:  2004-04-15
  • 修回日期:  2004-08-25
  • 刊出日期:  2005-10-19

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