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A Path Loss and Shadowing Model for Multilink Vehicle-to-Vehicle Channels in Urban Intersections.

Mikael G Nilsson1,2, Carl Gustafson3, Taimoor Abbas4

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Summary
This summary is machine-generated.

Accurate non line-of-sight (NLOS) vehicular communication models are crucial for urban traffic safety. This study introduces a new NLOS path loss model for vehicle-to-vehicle (V2V) communications, improving VANET simulation accuracy.

Keywords:
Vehicle-to-Vehiclechannel modelingcorrelationdiversitylarge scale fadingmultiple linksobstructionpath lossshadow fading

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Area of Science:

  • Electrical Engineering
  • Computer Science
  • Transportation Engineering

Background:

  • Non line-of-sight (NLOS) scenarios in urban intersections pose significant traffic safety risks.
  • Vehicle-to-vehicle (V2V) communication offers potential solutions for detecting vehicles in obstructed environments.
  • Existing NLOS V2V channel models have limitations, necessitating further research.

Purpose of the Study:

  • To develop and validate an alternative NLOS path loss model for V2V communication.
  • To analyze the impact of path loss models on the auto-correlation of large-scale fading.
  • To provide recommendations for enhancing vehicular ad-hoc network (VANET) simulations.

Main Methods:

  • Collected V2V communication channel measurements at 5.9 GHz in urban intersections.
  • Analyzed auto-correlation of large-scale fading processes.
  • Evaluated the influence of path loss and antenna pattern models on correlation properties.

Main Results:

  • A proper path loss and antenna pattern model significantly reduces the de-correlation distance to approximately 2⁻⁴ m.
  • Cross-correlation of large-scale fading between different V2V links can be neglected when accurate models are used.
  • Inaccurate models lead to longer de-correlation distances and increased computational complexity.

Conclusions:

  • Accurate NLOS path loss models are essential for realistic VANET simulations.
  • Simulations should incorporate geometry-dependent path loss models for blocked V2V links.
  • Neglecting accurate modeling increases simulation complexity and reduces reliability.