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OFDM系統(tǒng)中基于導(dǎo)頻的時(shí)變信道估計(jì)

胡蝶,  楊綠溪

胡蝶, 楊綠溪. OFDM系統(tǒng)中基于導(dǎo)頻的時(shí)變信道估計(jì)[J]. 電子與信息學(xué)報(bào), 2004, 26(9): 1376-1382.
引用本文: 胡蝶, 楊綠溪. OFDM系統(tǒng)中基于導(dǎo)頻的時(shí)變信道估計(jì)[J]. 電子與信息學(xué)報(bào), 2004, 26(9): 1376-1382.
Hu Die, Yang Lu-xi. Time-Varying Channel Estimation Based on Pilot Tones in OFDM Systems[J]. Journal of Electronics & Information Technology, 2004, 26(9): 1376-1382.
Citation: Hu Die, Yang Lu-xi. Time-Varying Channel Estimation Based on Pilot Tones in OFDM Systems[J]. Journal of Electronics & Information Technology, 2004, 26(9): 1376-1382.

OFDM系統(tǒng)中基于導(dǎo)頻的時(shí)變信道估計(jì)

Time-Varying Channel Estimation Based on Pilot Tones in OFDM Systems

  • 摘要: 該文對(duì)OFDM系統(tǒng)中基于導(dǎo)頻的時(shí)變信道估計(jì)進(jìn)行了研究，采用分組導(dǎo)頻對(duì)一個(gè)OFDM符號(hào)間隔內(nèi)某些時(shí)刻的信道沖擊響應(yīng)值進(jìn)行估計(jì)，提出一種利用低通插值估計(jì)一個(gè)符號(hào)間隔內(nèi)其他時(shí)刻的信道值的方法。仿真結(jié)果表明該文采用的低通插值方法所得到的估計(jì)均方誤差要小于用線性插值或直接用信道模型產(chǎn)生的系數(shù)進(jìn)行插值所得到的估計(jì)均方誤差。
    Abstract: The time-varying channel estimation methods for OFDM systems based on pilot tones are investigated. Grouped and equispaced pilot tones are used to estimate the Channel Impulse Response (CIR) of some given moments. The CIR of other moments over one OFDM symbol are estimated by a new low-pass interpolation method proposed in this paper. The simulation results show that the Normal Mean-Square Error (NMSE) of the proposed method is smaller than the linear interpolation method and model-based interpolation method.
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  • Cimini L J, Jr. Analysis and simulation of a digital mobile channel using orthogonal frequencydivision multiplexing. IEEE Trans. on Comm., 1985, COM-33(7): 665-675. ［2］Mignone V, Morello A. CD3-OFDM: A novel demodulation scheme for fixed and mobile receivers.IEEE Trans. on Comm., 1996, COM-44(9): 1144-1151. ［3］Coleri S, Ergen M, Puri A, Bahai A. Channel estimation techniques based on pilot arrangement in OFDM systems. IEEE Trans. on Broadcasting, 2002, 48(3): 223-229. ［4］van de Beek J J, Edfors O, Sandell M, Wilson S K, Borjesson P O. On channel estimation in OFDM systems. Proc. of VTC 95, Chicago, Illinois, 1995: 815-819. ［5］Edfors O, Sandell M, van de Beek J J, Wilson S K, Borjesson P O. OFDM channel estimation by singular value decomposition. IEEE Trans. on Comm., 1998, COM-46(7): 931-939. ［6］Li Y G, Cimini L J, Jr., Sollenberger N R. Robust channel estimation for OFDM systems with rapid dispersive fading channels. IEEE Trans. on Comm., 1998, COM-46(7): 902-915. ［7］Stamoulis A, Diggavi S N, Al-Dhahir N. Intercarrier interference in MIMO OFDM. IEEE Trans.on Signal Processing, 2002, SP-50(10): 2451-2464. ［8］Negi R, Cioffi J. Pilot tone selection for channel estimation in a mobile OFDM system. IEEE Trans. on Consum. Electron., 1998, 44(3): 1122-1128.
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出版歷程
  • 收稿日期:  2003-06-03
  • 修回日期:  2003-09-26
  • 刊出日期:  2004-09-19

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