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低信噪比下SMCC+系統(tǒng)精確大頻偏估計(jì)方案

羅仁澤 王汝言 朱維樂 蔣濤

羅仁澤, 王汝言, 朱維樂, 蔣濤. 低信噪比下SMCC+系統(tǒng)精確大頻偏估計(jì)方案[J]. 電子與信息學(xué)報(bào), 2004, 26(10): 1575-1579.
引用本文: 羅仁澤, 王汝言, 朱維樂, 蔣濤. 低信噪比下SMCC+系統(tǒng)精確大頻偏估計(jì)方案[J]. 電子與信息學(xué)報(bào), 2004, 26(10): 1575-1579.
Luo Ren-ze, Wang Ru-yan, Zhu Wei-le, Jiang Tao. Fast and Precise Scheme of Frequency Offset Estimation with Large Range for SMCC+ System with Lower SNR[J]. Journal of Electronics & Information Technology, 2004, 26(10): 1575-1579.
Citation: Luo Ren-ze, Wang Ru-yan, Zhu Wei-le, Jiang Tao. Fast and Precise Scheme of Frequency Offset Estimation with Large Range for SMCC+ System with Lower SNR[J]. Journal of Electronics & Information Technology, 2004, 26(10): 1575-1579.

低信噪比下SMCC+系統(tǒng)精確大頻偏估計(jì)方案

Fast and Precise Scheme of Frequency Offset Estimation with Large Range for SMCC+ System with Lower SNR

  • 摘要: 該文基于由電子科技大學(xué)提出的作為中國地面數(shù)字多媒體電視廣播傳輸標(biāo)準(zhǔn)候選方案之一的SMCC+系統(tǒng)和OFDM系統(tǒng),提出了一種在低信噪比下利用特殊構(gòu)造的短PN序列進(jìn)行快速精確的大范圍頻率同步的方法。經(jīng)仿真證明,信噪比在-20 dB范圍以上時(shí),該法在AWGN,單抽頭瑞利衰落信道和等值雙徑瑞利衰落信道環(huán)境糾正大范圍頻偏的性能比Tufvesson等人(1999)同類常規(guī)算法性能更優(yōu),從理論上而言,該算法可以估計(jì)1/2帶寬范圍內(nèi)的頻率偏移,顯然,該算法優(yōu)于常規(guī)同類算法。
  • ATSC. ATSC digital television standard. ATSC Standard A/53, September 16,1995.[2]ETS 300 744. Digital broadcasting systems for television, sounding services; framing structure, channel coding and modulation for digital terrestrial television, ETSI Draft EN 300 744V1.1.1(1999-1).[3]ITU-R WP 11A/59. Channel coding, frame structure and modulation scheme for terrestrial integrated service digital broadcasting (ISDB-T), ITU-R WP 11A/59-E, May 17, 1999.[4]Tureli U, Kivanc D, Liu H. Experimental and analytical studies on a high resolution OFDM carrier frequency estimator[J].IEEE Trans. on Vehicular Technology.2001, 50(2):629-643[5]Chen Biao. Maximum likelihood estimation of OFDM carrier frequency offset[J].IEEE Signal Processing Letters.2002, 9(4):123-126[6]Tureli U, Liu Hui, Zoltowski M D. OFDM blind carrier estimation: ESPRIT. IEEE Trans. on Commun., 2000, COM-48(9): 1459-1461.[7]Moosez P H. Technique for orthogonal frequency division multiplexing frequency offset correction.IEEE Trans. on Commun., 1994, COM-42(10): 253-257.[8]V. de Beek, J. J Sandell M, et al.. ML estimation of time and frequency offset in OFDM systems.IEEE Trans. on Signal Processing, 45(7): 1800-1805.[9]Meng-Han Hsieh, Che-Ho. A low-complexity frame synchronization and frequency offset compensation for OFDM systems over fading channels. IEEE Trans. on Commun., 1999, COM-48(5):1596-1609.[10]Schmidl M, et al.. Robust frequency and timing synchronization for OFDM. IEEE Trans. on Conmun., 1997, COM-45(12): 1613-1621.[11]Tufvesson F, et al.. Time and frequency synchronization for OFDM using PN-sequence preambles.IEEE Vehicular Technology Conference, 1999, VTC, Amsterdam, The Netherlands, 1999: 2203-2207.[12]Proakis G. Wireless Communications Principles and Pracitce. New York: Prentice Hall Inc.,1996, Chapter 4.
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  • 收稿日期:  2003-07-10
  • 修回日期:  2004-03-15
  • 刊出日期:  2004-10-19

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