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Proactive Doppler Shift Compensation in Vehicular Cyber-Physical Systems

Published: 01 April 2018 Publication History

Abstract

In vehicular cyber-physical systems CPS, safety information, including vehicular speed and location information, is shared among vehicles via wireless waves at specific frequency. This helps control vehicle to alleviate traffic congestion and road accidents. However, Doppler shift existing between vehicles with high relative speed causes an apparent frequency shift for the received wireless wave, which consequently decreases the reliability of the recovered safety information and jeopardizes the safety of vehicular CPS. Passive confrontation of Doppler shift at the receiver side is not applicable due to multiple Doppler shifts at each receiver. In this paper, we provide a proactive Doppler shift compensation algorithm based on the probabilistic graphical model. Each vehicle pre-compensates its carrier frequency individually, so that there is no frequency shift from the desired carrier frequency between each pair of transceiver. The pre-compensated offset for each vehicle is computed in a distributed fashion in order to be adaptive to the distributed and dynamic topology of vehicular CPS. Besides, the updating procedure is designed in a broadcasting fashion to reduce communication burden. It is rigorously proved that the proposed algorithm is convergence guaranteed even for systems with packet drops and random communication delays. Simulations based on real map and transportation data verify the accuracy and convergence property of the proposed algorithm. It is shown that this method achieves almost the optimal frequency compensation accuracy with an error approaching the Cramér-Rao lower bound.

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  1. Proactive Doppler Shift Compensation in Vehicular Cyber-Physical Systems

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    Published In

    cover image IEEE/ACM Transactions on Networking
    IEEE/ACM Transactions on Networking  Volume 26, Issue 2
    April 2018
    377 pages

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    IEEE Press

    Publication History

    Published: 01 April 2018
    Published in TON Volume 26, Issue 2

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    • (2024)An Incentive Approach for Sustainable Vehicle Resource Utilization in Delay-Energy Sensitive Vehicular Edge ComputingIEEE Transactions on Consumer Electronics10.1109/TCE.2024.341631870:3(5177-5187)Online publication date: 1-Aug-2024
    • (2020)Smart traffic management with cyber-physical systems for scenic areasProceedings of the 6th ACM SIGSPATIAL International Workshop on Emergency Management using GIS10.1145/3423333.3431793(1-4)Online publication date: 3-Nov-2020
    • (2020)Cost Optimization of Partial Computation Offloading and Pricing in Vehicular NetworksJournal of Signal Processing Systems10.1007/s11265-020-01572-992:12(1421-1435)Online publication date: 1-Dec-2020

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