Localization Accuracy Performance Comparison Between LTE-V and IEEE 802.11p

Most of the vehicular industry applications require precise, reliable, and secure positioning with cm level accuracy. IEEE 802.11p and LTE-V exploit technological solutions to achieve communication vehicle to vehicle V2V, vehicles to infrastructure V2I, vehicle to pedestrians V2P, or vehicle to everything V2X. This paper presents the achievable localization accuracy of IEEE 802.11p and LTE-V. Cramer Rao Lower Bound for time difference of arrival localization for two different vehicular network scenarios is computed to determine bounds of accuracies of the technologies. Measurements are simulated assuming additive white Gaussian noise channel with a variance that depends on the geometry of the vehicular network. The simulation results show that IEEE 802.11p outperforms LTE-V for the conditions considered in this work. In addition to this, having network sites at both sides of the highway and considering the geometry between vehicles and network sites improves vehicle localization accuracy.