Optimized iterative MAP ARQ for OFDM over rapidly-varying frequency-selective channels

被引:0
|
作者
Ketseoglou, Thomas [1 ]
机构
[1] Calif State Polytech Univ Pomona, Pomona, CA 91768 USA
来源
2007 WIRELESS TELECOMMUNICATIONS SYMPOSIUM | 2007年
关键词
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper we propose an optimized OFDM iterative ARQ receiver suitable for application in rapidly varying multipath channels. The receiver is an optimized MAP Turbo processor that exploits log likelihood ratio (LLR) information from previously failed transmissions. We show that this configuration achieves very high gains compared to a standard ARQ system by virtue of two co-operative mechanisms: First, by using (log likelihood ratios) LLR from previous decoding trials to improving the expectation maximization (EM) based algorithm channel tracking and LLR calculation during retransmissions and second by combining together the extrinsic detector LLR from previous reception attempts with the newly generated one from the retransmissions of a previously failed packet.
引用
收藏
页码:315 / 320
页数:6
相关论文
共 50 条
  • [31] Performance of quantized feedback beamforming in MIMO-OFDM links over time-varying, frequency-selective channels
    Sun, Xiantao
    Cimini, Leonard J.
    Greenstein, Larry J.
    Chan, Douglas S.
    Douglas, Brett
    2007 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-8, 2007, : 778 - +
  • [32] Robust OFDM transmissions over frequency-selective channels with multiplicative time-selective effects
    Scaglione, A
    Barbarossa, S
    Giannakis, GB
    2000 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, PROCEEDINGS, VOLS I-VI, 2000, : 2677 - 2680
  • [33] Performance of multiresolution OFDM on frequency-selective fading channels
    Kim, D
    Stuber, GL
    GLOBECOM 97 - IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, CONFERENCE RECORD, VOLS 1-3, 1997, : 16 - 20
  • [34] Innovations-based MAP detection for time-varying frequency-selective channels
    Hart, BD
    Pasupathy, S
    IEEE TRANSACTIONS ON COMMUNICATIONS, 2000, 48 (09) : 1507 - 1519
  • [35] Performance of multiresolution OFDM on frequency-selective fading channels
    Kim, D
    Stüber, GL
    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 1999, 48 (05) : 1740 - 1746
  • [36] Distributed STBC-OFDM and Distributed SFBC-OFDM for Frequency-Selective and Time-Varying Channels
    Yiu, Simon
    Calin, Doru
    Kaya, Ozge
    Yang, Kai
    2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC), 2012,
  • [37] Estimation of OFDM integer frequency offset over rapidly time-varying channels
    You, Young-Hwan
    Kang, Sung-Jin
    Hong, Dae-Ki
    Lee, Jang-Yeon
    Cho, Jin-Woong
    IEICE TRANSACTIONS ON COMMUNICATIONS, 2006, E89B (07) : 2099 - 2101
  • [38] Improved Reliability Information for OFDM Systems On Time-Varying Frequency-Selective Fading Channels
    Ogundile, O. O.
    Versfeld, D. J. J.
    2015 WIRELESS TELECOMMUNICATIONS SYMPOSIUM (WTS), 2015,
  • [39] Performance of training-based OFDM systems in the presence of time varying frequency-selective channels
    Bradaric, I
    Petropulu, AP
    2004 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL IV, PROCEEDINGS: AUDIO AND ELECTROACOUSTICS SIGNAL PROCESSING FOR COMMUNICATIONS, 2004, : 737 - 740
  • [40] Blind classification algorithm for STBC-OFDM signals over frequency-selective channels
    Ling Q.
    Zhang L.
    Yan W.
    Yu K.
    2017, Chinese Institute of Electronics (39): : 1141 - 1147