Sensors (Jul 2023)

Maximal Ratio Combining Detection in OFDM Systems with Virtual Carriers Over V2V Channels

  • J. Alberto Del Puerto-Flores,
  • Francisco R. Castillo-Soria,
  • J. Vázquez-Castillo,
  • R. R. Palacio Cinco

DOI
https://doi.org/10.3390/s23156728
Journal volume & issue
Vol. 23, no. 15
p. 6728

Abstract

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This paper examines the performance of orthogonal frequency division multiplexing (OFDM) systems for vehicle-to-vehicle (V2V) communication channels. More specifically, a doubly selective channel under high intercarrier interference (ICI) is considered. Current solutions involve complex detection and/or reduced spectral efficiency receivers. This paper proposes the use of virtual carriers (VC) in an OFDM system with a low-complexity maximal ratio combining (MRC) detector to improve the bit error rate (BER) performance. The results show that VC provides diversity in received data, resulting in a ≥5 dB gain compared to previous OFDM systems with conventional linear/nonlinear detectors used as a reference. The detector presented in this paper has linear complexity, making it a suitable solution for real-time V2V communication systems.

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