Convolutional recurrent neural network-based channel equalization: An experimental study

Yang Li, Minhua Chen, Yang Yang, Ming Tuo Zhou, Cheng-Xiang Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

In this paper, we revisit the idea of using deep neural network for channel equalization to account for nonlinear channel distortions as well as temporal variations of radio signals. Our insight is leveraging the the shift-invariant properties of the convolutional neural network (CNN) to learn matched filters analogous to the tap weights of conventional equalizer. Then we feed the learned filters into a subsequent recurrent neural network (RNN) with long-short-term-memory (LSTM) cells for temporal modeling of the channel. We train our proposed CNN-RNN (CRNN) equalizer based on real testbed collected data and enlarge the generalization ability of the learned network model as much as we can to adapt to different channel conditions. Experimental results show that the SER performance for our designated single-input single-output (SISO) system which utilises quadrature phase shift keying (QPSK) modulation scheme with the proposed CRNN-based channel equalizer outperforms that of other equalizers by average 2 to 5 dB at low signal-to-noise ratio (SNR).

Original languageEnglish
Title of host publication2017 23rd Asia-Pacific Conference on Communications (APCC)
PublisherIEEE
ISBN (Electronic)9781740523905
DOIs
Publication statusPublished - 1 Mar 2018

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing

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    Li, Y., Chen, M., Yang, Y., Zhou, M. T., & Wang, C-X. (2018). Convolutional recurrent neural network-based channel equalization: An experimental study. In 2017 23rd Asia-Pacific Conference on Communications (APCC) [8304090] IEEE. https://doi.org/10.23919/APCC.2017.8304090