Abstract
Vehicular Adhoc Networks (VANET) was created to facilitate and enable inter vehicular communication. One of the most challenging problems affecting the feasibility of VANET is the problem of high mobility of the nodes resulting in an induced Doppler Shift (DS) in the carrier frequency at the receiver end. The work presented in this paper proposes a solution to mitigate the effect of DS affecting the VANET environment. Based on the Direct Derivation Method (DDM) derived from the principle of communication theory, an Improved DDM (IDDM) concept, analysis and design is developed and explored. Several critical tests are performed and it was demonstrated that not only the IDDM response exhibits the BER threshold limit described by the IEEE 802.11 standard; the approach offers for the same SNR value, a throughput improvement of up to 66.66 % and an improved BER response of more than 25 % compared to the DDM and Constant (Cte). A performance analysis also demonstrated that not only IDDM performs faster, it equally offers considerable improvement in term of efficiency over the DDM approach.
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This work was supported by Tshwane University of Technology/French South African Institute of Technology and National Research Foundation (NRF) via the Freestanding Fellowship program.
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Feukeu, E.A., Djouani, K. & Kurien, A. Doppler Shift Mitigation in a VANET using an IDDM approach. J Ambient Intell Human Comput 7, 321–332 (2016). https://doi.org/10.1007/s12652-016-0365-4
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DOI: https://doi.org/10.1007/s12652-016-0365-4