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

J Alberto Del Puerto-Flores1, Francisco R Castillo-Soria2, J Vázquez-Castillo3

  • 1Facultad de Ingeniería, Universidad Panamericana, Álvaro del Portillo 49, Zapopan 45010, JAL, Mexico.

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Summary
This summary is machine-generated.

This study introduces virtual carriers (VC) in orthogonal frequency division multiplexing (OFDM) systems for vehicle-to-vehicle (V2V) communications. This method significantly improves bit error rate (BER) performance with a low-complexity detector.

Keywords:
OFDM systemsV2Vmaximal ratio combining (MRC)vehicular communicationsvirtual carriers

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Area of Science:

  • Wireless Communication
  • Signal Processing

Background:

  • Vehicle-to-vehicle (V2V) communication systems face challenges with doubly selective channels and high intercarrier interference (ICI).
  • Existing solutions for mitigating ICI in V2V OFDM systems often require complex detection or reduce spectral efficiency.

Purpose of the Study:

  • To propose a novel approach using virtual carriers (VC) in OFDM systems to enhance bit error rate (BER) performance for V2V communication.
  • To introduce a low-complexity maximal ratio combining (MRC) detector suitable for real-time V2V applications.

Main Methods:

  • Implementation of virtual carriers (VC) within an orthogonal frequency division multiplexing (OFDM) framework.
  • Development and application of a low-complexity maximal ratio combining (MRC) detector.

Main Results:

  • The proposed VC-OFDM system with MRC detection achieved a diversity gain of at least 5 dB compared to conventional OFDM systems.
  • The detector exhibits linear complexity, making it computationally efficient for real-time V2V systems.

Conclusions:

  • Virtual carriers (VC) effectively provide diversity in received data for V2V communication channels.
  • The proposed low-complexity MRC detector with VC offers a practical and high-performance solution for real-time V2V OFDM systems.