Compensating the effect of Doppler shift in a vehicular network

Abstract

Wireless channels operate through the transmission of electromagnetic signals from the transmitter to the receiver. In a fixed wireless network, the transmission medium is often distorted or disrupted by inherent natural phenomenon which in turn corrupt, obstruct or cause most of the data transmitted over the channel to generally get garbled. In a vehicular network, greater complexity is added as a result of the fast mobility of the nodes within the network. It therefore becomes very difficult for the receiver to decode the data transmitted efficiently. Based on the IEEE standard, communication between two mobile can only be possible if a minimum required threshold has been met. In this paper, a Direct Development Method (DDM) strategy is presented that seeks to combat the effect of Doppler Shift (DS) in a vehicular network. The proposed approach is developed based on the principle of basic communication theory and validated through simulations. It is demonstrated that it is possible to achieve a good communication link between two mobiles moving at the relative speed of up to 250 km/h taking into account the prescribed threshold.