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基于時(shí)變衰落信道分解的OFDM信號接收技術(shù)

孟德香 吳湛擊 梁紅玉 吳偉陵

孟德香, 吳湛擊, 梁紅玉, 吳偉陵. 基于時(shí)變衰落信道分解的OFDM信號接收技術(shù)[J]. 電子與信息學(xué)報(bào), 2005, 27(10): 1630-1634.
引用本文: 孟德香, 吳湛擊, 梁紅玉, 吳偉陵. 基于時(shí)變衰落信道分解的OFDM信號接收技術(shù)[J]. 電子與信息學(xué)報(bào), 2005, 27(10): 1630-1634.
Meng De-xiang, Wu Zhan-ji, Liang Hong-yu, Wu Wei-ling. OFDM Signal Receiving Technique Based on Time-varying Fading Channels Decomposing[J]. Journal of Electronics & Information Technology, 2005, 27(10): 1630-1634.
Citation: Meng De-xiang, Wu Zhan-ji, Liang Hong-yu, Wu Wei-ling. OFDM Signal Receiving Technique Based on Time-varying Fading Channels Decomposing[J]. Journal of Electronics & Information Technology, 2005, 27(10): 1630-1634.

基于時(shí)變衰落信道分解的OFDM信號接收技術(shù)

OFDM Signal Receiving Technique Based on Time-varying Fading Channels Decomposing

  • 摘要: OFDM信號在時(shí)變衰落信道中傳輸時(shí)存在載波間干擾(ICI),降低了系統(tǒng)的性能。基于衰落信道的多普勒分解,OFDM信號在時(shí)變衰落信道中的傳輸可以等效成信息數(shù)據(jù)直接通過無衰落的離散白噪聲濾波器模型信道傳輸,改進(jìn)的Viterbi算法可用于接收這類信號。該接收技術(shù)可以有效去除傳統(tǒng)的OFDM系統(tǒng)中的載波間干擾,消除誤碼的地板效應(yīng),提高了系統(tǒng)性能。
  • IEEE, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: High-Speed Physical Layer in the 5 GHZ Band, IEEE Std802.11a-1999.[2]ETSI, Broadband Radio Access Networks (BRAN); HIPERLAN Type 2; Physical (PHY) layer, ETSI TS 101 475 V1.1.1 (2000-04).[3]ETSI, Radio broadcasting systems: Digital audio broadcasting to mobile, portable and fixed receivers, European Telecomm-[4]unication Standard, ETS300-401, Feb. 1995.[5]Tuttlebee W H W. Consumer digital radio: from concept to reality[J].Electronics and Communication Engineering Journal.1998, 10(6):263-276[6]ETSI, Digital video broadcasting: Framing structure, channel coding and modulation for digital terrestrial television, European Telecommunication Standard, EN 3---744, Aug. 1997.[7]Reimers U. DVB-T: the COFDM-based system for terrestrial television[J].Electronics and Communication Engineering Journal.1997, 9(1):28-32[8]Ye Li, Cimini L J. Bounds on the interchannel interference of OFDM in time-varying impairments[J].IEEE Trans. on Comm.2001, 49(3):401-404[9]Sayeed M.[J].Aazhang B. Exploiting Doppler diversity in mobile wireless communications. in Proc. 1997 Conf. Information Sciences and Systems (CISS97), Baltimore, MD.1997,:-[10]Sayeed M, Aazhang B. Joint multipath-doppler diversity in mobile wireless communications[J].IEEE Trans. on Comm.1999, 47(1):123-132[11]Proakis J. Digital Communications, New York, McGraw Hill, 4th ed., 2001: 598-616.[12]Viterbi A J. Error bounds for convolutional codes and asymptotically optimum decoding algorithm. IEEE Trans. on Info. Theory, 1967, IT-13(4): 260-269.[13]Wilson S G. Digital Modulation and Coding, Englewood Cliffs, NJ: Prentice-Hall, 1996: 587-588.[14]Forney Jr G D. Maximum-likelihood sequence estimation of digital sequence in the presence of intersymbol interference. IEEE Trans. on Info. Theory, 1972, IT-18(5): 363-378.
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  • 收稿日期:  2004-04-12
  • 修回日期:  2004-09-13
  • 刊出日期:  2005-10-19

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