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Comparison of Linear, Widely Linear and Fresh Equalizers for FBMC-OQAM Systems with Different Numerologies

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Abstract

This paper deals with the equalization of rectilinear and quasi-rectilinear modulated signals over frequency selective channels. This study is motivated by the fact that offset quadrature amplitude modulation based filter bank multi-carrier, one of the most prominent post orthogonal frequency division multiplexing contenders for beyond 5G wireless communication systems, employs offset quadrature modulation. This modulation is known to be cyclo-stationary and non-second order circular. Three minimum mean squared error based equalizing structures have been developed, referred to as linear (LE), widely linear (WLE) and widely linear Fresh (WL Fresh) equalizers. For the proposed equalizers, both symbol spaced and fractionally spaced processing have been evaluated, in synchronous DL/UL and asynchronous UL scenarios, with mixed numerologies transmissions. The simulation results show the ability of WL Fresh equalizer to suppress inter-numerology and inter-symbol interferences over frequency selective channels, outperforming the WLE and LE equalization schemes.

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Acknowledgements

This work was supported by the WONG5 Project from the French National Agency (ANR) under Contract ANR-15-CE25-0005-02.

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Authors and Affiliations

  1. Sup’Com, Innov’COM, University of Carthage, 2083, Ariana, Tunisia

    Hayfa Fhima, Rafik Zayani & Ridha Bouallegue

  2. CEDRIC/LAETITIA, CNAM, Paris, 75003, France

    Hayfa Fhima, Hmaied Shaïek & Daniel Roviras

  3. CPGEI/Electronics Department, Federal University of Technology - Paraná, Curitiba, Brazil

    Bruno Sens Chang

Authors
  1. Hayfa Fhima
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  2. Rafik Zayani
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  3. Hmaied Shaïek
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  6. Ridha Bouallegue
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Correspondence to Hayfa Fhima.

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Fhima, H., Zayani, R., Shaïek, H. et al. Comparison of Linear, Widely Linear and Fresh Equalizers for FBMC-OQAM Systems with Different Numerologies. Wireless Pers Commun 115, 1137–1160 (2020). https://doi.org/10.1007/s11277-020-07615-5

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