National Tsing Hua University Institutional Repository:An adaptive receiver design for OFDM systems using conjugate transmission
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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  An adaptive receiver design for OFDM systems using conjugate transmission


    题名: An adaptive receiver design for OFDM systems using conjugate transmission
    作者: Chin-Liang Wang;Po-Chung Shen;Ying-Chang Lin;Jia-Hong Huang
    教師: 王晉良
    日期: 2013
    出版者: Institute of Electrical and Electronics Engineers
    關聯: IEEE Transactions on Communications, Institute of Electrical and Electronics Engineers, Volume PP, Issue 99, Pages 1 - 10
    关键词: Adaptive algorithms
    adaptive receivers
    frequency offset
    intercarrier interference (ICI)
    ICI cancellation
    orthogonal frequency division multiplexing (OFDM)
    摘要: In this paper, we propose an adaptive receiver for efficient intercarrier interference (ICI) cancellation in orthogonal frequency division multiplexing (OFDM) systems using two-path conjugate transmission. This receiver design is based on the phase rotated conjugate cancellation (PRCC) concept presented recently, where two individual phase rotations are employed on the two receive paths, rather than only one phase rotation is adopted for the two transmit paths in the PRCC scheme. We derive the optimal phase rotations using the criterion of maximizing the carrier-to-interference ratio, and then develop an adaptive normalized block least mean-squared algorithm to approach the optimal solutions. With such adaptive phase rotations in the receiver, the carrier frequency offset (CFO) variations due to the channel effect and the mismatch between oscillators at the transmitter and receiver can effectively be tracked without feeding back the CFO estimate to the transmitter as required in PRCC. Simulation results demonstrate that the proposed approach has better bit error rate performance than the PRCC and the conventional CC scheme for various time-varying channels, even when the CFO/channel estimation error is considered.
    显示于类别:[電機工程學系] 期刊論文
    [通訊工程研究所] 期刊論文
    [電腦與通訊科技研發中心] 期刊論文


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