Detection of Nonlinearly Distorted OFDM Signals via Generalized Approximate Message Passing

Sergey V. Zhidkov

Detection of Nonlinearly Distorted OFDM Signals via Generalized Approximate Message Passing

Information Theory 2017-03-07 v1 math.IT

Authors: Sergey V. Zhidkov

Abstract

In this paper, we propose a practical receiver for multicarrier signals subjected to a strong memoryless nonlinearity. The receiver design is based on a generalized approximate message passing (GAMP) framework, and this allows real-time algorithm implementation in software or hardware with moderate complexity. We demonstrate that the proposed receiver can provide more than a 2dB gain compared with an ideal uncoded linear OFDM transmission at a BER range $10^{-4}\div10^{-6}$ in the AWGN channel, when the OFDM signal is subjected to clipping nonlinearity and the crest-factor of the clipped waveform is only 1.9dB. Simulation results also demonstrate that the proposed receiver provides significant performance gain in frequency-selective multipath channels

Keywords

OFDM nonlinear distortion generalized approximate message passing GAMP receiver design clipping nonlinearity

Cite

@article{arxiv.1703.01562,
  title  = {Detection of Nonlinearly Distorted OFDM Signals via Generalized Approximate Message Passing},
  author = {Sergey V. Zhidkov},
  journal= {arXiv preprint arXiv:1703.01562},
  year   = {2017}
}

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