Abstract

Antenna diversity is a well-known technique used to improve the quality and reliability of a wireless link. In vehicular networks, a different approach to antenna diversity is needed due to their unique channel characteristics. However, this issue has not been actively researched, especially for the positioning of antennas. In this paper, we highlight the benefit of vertical diversity over traditional horizontal diversity techniques in vehicular network environments. Through experiments using IEEE 802.11a radios in the 5.2GHz band, we first show the difference of attenuation patterns from various antenna positions installed in a vehicle, then we show the benefit of vertical diversity by quantifying the diversity gains and combined error rates. This finding has implications for the future position of antenna installation in vehicles.

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