Equalization scheme for OFDM systems in long delay spread channels

被引：3
|
作者：
Yu, HJ [1 ]
Kim, MS [1 ]
Jeon, T [1 ]
Lee, SK [1 ]
机构：
[1] Elect & Telecommun Res Inst, Mobile Telecommun Res Div, Next Generat Wireless LAN Res Team, Taejon 305350, South Korea
来源：
2004 IEEE 15TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-4, PROCEEDINGS | 2004年
关键词：
D O I：
10.1109/PIMRC.2004.1373907
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, a decision feedback equalizer (DFE) type of equalization scheme is proposed to mitigate the effect of delay spread for orthogonal frequency division multiplexing (OFDM) systems. The performance degradation is severe in case that the delay spread of wireless channels is longer than a cyclic prefix (CP) due to the effect of inter-symbol interference (ISI) and inter-carrier interference (ICI). The effect of ICI and ISI is analytically described in matrix equations which includes signal-to-noise ratio (SNR) degradation for a given channel condition. The proposed scheme improves the performance using decision feedback mechanism without increasing the length of CP, which preserves the system efficiency for the OFDM.
引用
收藏
页码：1297 / 1301
页数：5
相关论文
共 50 条
  • [1] Timing and delay spread estimation scheme in OFDM systems
    Wen, Jyh-Horng
    Lee, Shu-Hong
    Lee, Gwo-Ruey
    Chang, Jin-Tong
    [J]. IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, 2008, 54 (02) : 316 - 320
  • [2] An efficient equalization method to minimize delay spread in OFDM/DMT systems
    Schur, R
    Speidel, J
    [J]. 2001 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-10, CONFERENCE RECORD, 2001, : 1481 - 1485
  • [3] Pre-equalization for MIMO wireless channels with delay spread
    Sampath, H
    Bölcskei, H
    Paulraj, AJ
    [J]. IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2000, VOLS 1-6, PROCEEDINGS: BRINGING GLOBAL MOBILITY TO THE NETWORK AGE, 2000, : 1175 - 1178
  • [4] Blind Estimation of Maximum Delay Spread in OFDM Systems
    Husen, Sri Andari
    Baggen, Stan
    Filippi, Alessio
    [J]. 2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6, 2006, : 1948 - 1952
  • [5] Spread OFDM performance with MMSE equalization
    Debbah, MA
    Loubaton, P
    De Courville, M
    [J]. 2001 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS I-VI, PROCEEDINGS: VOL I: SPEECH PROCESSING 1; VOL II: SPEECH PROCESSING 2 IND TECHNOL TRACK DESIGN & IMPLEMENTATION OF SIGNAL PROCESSING SYSTEMS NEURALNETWORKS FOR SIGNAL PROCESSING; VOL III: IMAGE & MULTIDIMENSIONAL SIGNAL PROCESSING MULTIMEDIA SIGNAL PROCESSING - VOL IV: SIGNAL PROCESSING FOR COMMUNICATIONS; VOL V: SIGNAL PROCESSING EDUCATION SENSOR ARRAY & MULTICHANNEL SIGNAL PROCESSING AUDIO & ELECTROACOUSTICS; VOL VI: SIGNAL PROCESSING THEORY & METHODS STUDENT FORUM, 2001, : 4035 - 4035
  • [6] Spread OFDM performance with MMSE equalization
    Debbah, M
    Loubaton, P
    de Courville, M
    [J]. 2001 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS I-VI, PROCEEDINGS: VOL I: SPEECH PROCESSING 1; VOL II: SPEECH PROCESSING 2 IND TECHNOL TRACK DESIGN & IMPLEMENTATION OF SIGNAL PROCESSING SYSTEMS NEURALNETWORKS FOR SIGNAL PROCESSING; VOL III: IMAGE & MULTIDIMENSIONAL SIGNAL PROCESSING MULTIMEDIA SIGNAL PROCESSING - VOL IV: SIGNAL PROCESSING FOR COMMUNICATIONS; VOL V: SIGNAL PROCESSING EDUCATION SENSOR ARRAY & MULTICHANNEL SIGNAL PROCESSING AUDIO & ELECTROACOUSTICS; VOL VI: SIGNAL PROCESSING THEORY & METHODS STUDENT FORUM, 2001, : 2385 - 2388
  • [7] A New Equalization Scheme for OFDM Systems with Insufficient Guard Interval
    Zhao, Liye
    Yang, Bo
    Men, Aidong
    [J]. 2008 4TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-31, 2008, : 713 - 716
  • [8] Doppler Spread Estimation by Tracking the Delay-Subspace for OFDM Systems in Doubly Selective Fading Channels
    Zhao, Xiaochuan
    Peng, Tao
    Yang, Ming
    Wang, Wenbo
    [J]. IEEE SIGNAL PROCESSING LETTERS, 2009, 16 (1-3) : 212 - 215
  • [9] Split soft-decision equalization for wireless channels with large delay spread
    Yu, JX
    Li, Y
    Luo, ZQ
    Yoshida, S
    [J]. IEEE TRANSACTIONS ON COMMUNICATIONS, 2005, 53 (02) : 269 - 277
  • [10] An OFDM timing recovery scheme with inherent delay-spread estimation
    Ramasubramanian, K
    Baum, K
    [J]. GLOBECOM '01: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-6, 2001, : 3111 - 3115
12345