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基于時頻聯(lián)合估計(jì)的短波OFDM的檢測算法

闞春榮,  王庭昌

闞春榮, 王庭昌. 基于時頻聯(lián)合估計(jì)的短波OFDM的檢測算法[J]. 電子與信息學(xué)報(bào), 2005, 27(6): 857-860.
引用本文: 闞春榮, 王庭昌. 基于時頻聯(lián)合估計(jì)的短波OFDM的檢測算法[J]. 電子與信息學(xué)報(bào), 2005, 27(6): 857-860.
Kan Chun-rong, Wang Ting-chang. A Detection Algrithm Based on Joint Time and Frequency Offset Estimation for OFDM in HF Communications[J]. Journal of Electronics & Information Technology, 2005, 27(6): 857-860.
Citation: Kan Chun-rong, Wang Ting-chang. A Detection Algrithm Based on Joint Time and Frequency Offset Estimation for OFDM in HF Communications[J]. Journal of Electronics & Information Technology, 2005, 27(6): 857-860.

基于時頻聯(lián)合估計(jì)的短波OFDM的檢測算法

A Detection Algrithm Based on Joint Time and Frequency Offset Estimation for OFDM in HF Communications

  • 摘要: 針對短波信道的特點(diǎn),該文提出了一種OFDM同步檢測方案。方案采用m序列調(diào)制導(dǎo)頻符號,利用時頻偏移聯(lián)合估計(jì)得到m序列的相關(guān)峰來實(shí)現(xiàn)同步檢測。該文理論分析了方案中判決門限區(qū)間的選取。蒙特卡羅仿真表明,該方案在低信噪比(-10dB)下性能良好,有可靠的同步概率和小的虛警概率。
    Abstract: Against the character of HF channels, this paper presents an OFDM synchronization detection scheme, which uses m sequence to modulate the pilot symbols. Based on joint time and frequency-offset estimation, synchronization detection can be implemented using the correlation peak of the m sequence in low SNR. Theoretical analysis shows the right selection of range for decision threshold. Monte Carlo simulation results show the scheme has good performance with a reliable detection probability and a low false alarm probability under low SNR( - 10dB).
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  • Muquet B, Wang Z, Giannakis G B, de Courville M, Duhamel P.Cyclic-prefixing or zero-padding for wireless multicarrier transmissions? IEEE Trans. on Commun., 2002, 50(12): 2136- 2148.[2]Moose P H. A technique for orthogonal frequency division multiplexing frequency offset correction[J].IEEE Trans. on Commun.1994, 42(10):2908-[3]Tufvesson F, Edfors O, Faulkner M. Time and frequency synchronization for OFDM using PN-sequence preambles[J].Proc VTC99, Amsterdam, The Netherlands.1999, 4:2203-[4]Schmidl T M, Cox D C. Robust frequency and timing synchronization for OFDM[J].IEEE Trans. on Commun.1997,45(12):1613-[5]Yun Hee Kim, Iickho Song, Seokho Yoon, So Ryoung Park. An efficient frequency offset estimator for OFDM systems, and its performance characteristics[J].IEEE Trans. on Vehicular .Technology.2001, 50(5):1307-[6]Nilsson E M.[J].Giles C. Wideband Multi-carrier Transmission for Military HF Communication. Proc. Milcom97, Monterey, CA,U.S.A., Nov.1997,:-[7]Watterson C C, Juroshek J R, Bendema W D. Experimention confirmation of an HF channel model. IEEE Trans. on Commun.,1970, COM-18(6): 792 - 803.[8]Pollet T, van Bladel M, Moeneclaey M. BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise[J].IEEE Trans. on Commun.1995, 43(2/3/4):191-[9]Pollet T, Moeneclaey M.Synchronizability of OFDM signals[J].Proc. GLOBECOM95, Singapore, November.1995, 3:2054-2058[10]Pollet T, Spruyt P, Moeneclaey M. The BER performance of OFDM systems using non-synchronized sampling. Proc.GLOBECOM94, San Francisco, USA, November 1994: 253-257.[11]Li X, Ritcey J A. M-sequence for OFDM peak-to-average power ratio reduction and error correction[J].Electron Lett.1997, 33(7):554-[12]Tellambura C. Use of m-sequences for OFDM peak to average power ratio reduction, Electronic[J].Lett.1997, 33(15):1300-1301
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出版歷程
  • 收稿日期:  2003-12-29
  • 修回日期:  2004-07-19
  • 刊出日期:  2005-06-19

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