Link Adaptation with Position/Motion Information in Vehicle-to-Vehicle Networks

Wireless communication networks use link adaptation to select physical layer parameters that optimize the transmission strategy as a function of the wireless channel realization. In the vehicle-to-vehicle (V2V) networks considered in this letter, the short coherence time of the wireless channel make...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2012-02, Vol.11 (2), p.505-509
Main Authors: Daniels, R. C., Heath, Robert W.
Format: Article
Language:English
Subjects:
Acceleration
Adaptation
Adaptation models
Adaptive modulation and coding
Applied sciences
Channels
Coding, codes
Coherence
Communications networks
Exact sciences and technology
GPS
Impulse response
Information, signal and communications theory
link adaptation
Links
Loss measurement
Mathematical models
Modulation, demodulation
Motion measurement
Networks
PNT
Satellite telecommunications. Space telecommunications
Signal and communications theory
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Vehicles
vehicular communication
Wireless communication
Wireless communications
wireless fingerprinting
Wireless networks
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Summary:Wireless communication networks use link adaptation to select physical layer parameters that optimize the transmission strategy as a function of the wireless channel realization. In the vehicle-to-vehicle (V2V) networks considered in this letter, the short coherence time of the wireless channel makes link adaptation based on the impulse response challenging. Consequently, link adaptation in V2V wireless networks may instead exploit the large-scale characteristics of the wireless channel (i.e. path loss) since they evolve slowly and enable less frequent feedback. Large-scale channel information may be captured through channel or position/motion measurements. We show, through the definition of new large-scale coherence expressions, that channel measurements render large-scale coherence as a function of time-change while the position/motion measurements render coherence as a function of velocity-change. This letter is concluded with highway simulations of modeled and measured channels to demonstrate the advantage of position/motion information for feedback reduction in V2V link adaptation.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2011.121911.110086