PENG Yuexing, ZHAO Hui, WANG Wenbo. Inter-carrier Interference Analysis and Mitigationfor OFDM System over Fast Fading Channels[J]. Chinese Journal of Electronics, 2010, 19(1): 181-186.
Citation: PENG Yuexing, ZHAO Hui, WANG Wenbo. Inter-carrier Interference Analysis and Mitigationfor OFDM System over Fast Fading Channels[J]. Chinese Journal of Electronics, 2010, 19(1): 181-186.

Inter-carrier Interference Analysis and Mitigationfor OFDM System over Fast Fading Channels

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2010-01-05
  • Inter-carrier interference (ICI) due to
    Doppler spread is analyzed for OFDM system in highly
    mobile applications, and then an iterative ICI mitigation
    method is developed. With the Jakes' model for the
    Doppler power spectrum and linear model in one OFDM
    symbol interval for time-varying channel, the analytical
    closed-form expression of Signal-to-interference ratio (SIR)
    and Signal-to-interference-plus-noise ratio (SINR) are de-
    veloped with neither assumption on the statistical charac-
    teristic of ICI nor constraint on the statistical model for
    the fading channels. Then, a joint detection algorithm is
    proposed to iteratively mitigate ICI and estimate channel
    and detect symbols, where the ICI from a few neighbor-
    ing interfering subcarriers which contribute the majority
    of ICI power is regenerates and partially subtracted from
    the received signal in order to mitigate decision error accu-
    mulation. The number of concerned interfering subcarriers
    and the optimal partial ICI cancellation factor are inves-
    tigated for the tradeo® of complexity reduction and Mean
    square error (MSE) minimization. Simulation results ver-
    ify the proposed method can mitigate ICI e®ectively.
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