KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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On Narrowband Interference Suppression in OFDM-based Systems with CDMA and Weighted-type Fractional Fourier Transform Domain Preprocessing

  • Liang, Yuan (School of Information and Navigation Institute, Air Force Engineering University) ;
  • Da, Xinyu (School of Information and Navigation Institute, Air Force Engineering University) ;
  • Wang, Shu (School of Information and Navigation Institute, Air Force Engineering University)
  • Received : 2016.09.24
  • Accepted : 2017.07.20
  • Published : 2017.11.30
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Abstract

In this paper, we propose a new scheme to suppress the narrowband interference (NBI) in OFDM-based systems. The scheme utilizes code division multiple access (CDMA) and weighted-type fractional Fourier transform (WFRFT) domain preprocessing technologies. Through setting the WFRFT order, the scheme can switch into a single carrier (SC) or a multi-carrier (MC) frequency division multiple access block transmission system. The residual NBI can be eliminated to the maximum extent when the WFRFT order is selected properly. Final simulation results show that the proposed system can outperform MC and SC with CDMA and frequency domain preprocessing in terms of the narrowband interference suppression.

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