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    Implementation and co-simulation of hybrid pilot-aided channel estimation with decision feedback equalizer for OFDM systems

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    Authors
    Li, Wei
    Zhang, Yue
    Huang, Li-Ke
    Maple, Carsten
    Cosmas, John
    Affiliation
    University of Bedfordshire
    Issue Date
    2012
    Subjects
    CFO
    DFE
    EVM
    FPGA
    MMSE
    OFDM
    SFO
    channel estimation
    co-simulation
    OFDM modulation
    
    Metadata
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    Abstract
    This paper introduces novel hybrid pilot-aided channel estimation with decision feedback equalizer(DFE) for OFDM systems and its corresponding hardware co-simulation platform. This pilot-aided channel estimation algorithm consists of two parts: coarse estimation and fine estimation. In the coarse estimation, the combined classical channel estimation methods including carrier frequency offset (CFO) and channel impulse response (CIR) estimation are used. Based on the received training sequence and pilot tones in the frequency domain, the major CFO, sampling clock frequency offset (SFO) and CIR effect coefficients are derived. In the fine estimation, the pilot-aided polynomial interpolation estimation combined with a new decision feedback equalizer scheme based on minimum mean squared error (MMSE) criteria is proposed to reduce the residual effect caused by imperfect CIR equalizer, SFO and CFO. At the same time, for the purpose of speeding up the whole development and verification process, a new architecture of co-simulation platform which combines software and hardware is introduced. The simulation results on the co-simulation platform indicate that the proposed hybrid channel estimation scheme can enhance the receiver performance by 6 dB in terms of error vector magnitude (EVM) over large ranges of CFO and SFO and BER performance by 7 dB for SNR range over 15 dB.
    Citation
    Li, W., Zhang, Y., Huang, L.K., Maple, C., Cosmas, J.P. (2012) 'Implementation and Co-Simulation of Hybrid Pilot-Aided Channel Estimation With Decision Feedback Equalizer for OFDM Systems' IEEE Transactions on Broadcasting 58 (4):590-602
    Publisher
    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
    Journal
    IEEE Transactions on Broadcasting
    URI
    http://hdl.handle.net/10547/272973
    DOI
    10.1109/TBC.2012.2207249
    Additional Links
    http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6279474
    Type
    Article
    Language
    en
    ISSN
    0018-9316
    1557-9611
    ae974a485f413a2113503eed53cd6c53
    10.1109/TBC.2012.2207249
    Scopus Count
    Collections
    Centre for Research in Distributed Technologies (CREDIT)

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