Abstract: Intra-Vehicular communication from various sensors to the Engine Control Unit (ECU) as well as from other mechanical devices in a vehicle are connected to the dashboard is currently in focus due to the need to support Connected Cars in a 5G scenario. Presently dedicated power lines and data lines are used making it redundant and expensive. Here we examine methods to transfer data over a power line in a typical intra vehicular scenario noting that the power and data lines are different in various aspects. Data lines are point to point links but power lines have bridge taps connected to various sensors with varying loads. Two techniques to perform an efficient communication between the sensors and the dashboard are proposed. The first way is to use the capacity afforded by Multiple Carrier Communication that readily provides substantial redundancy in terms of bandwidth, facilitating rate reapportioning to cater to varying channel impedance. However, the data rates are unsustainable when there is a sudden change in channel response for which a second method is proposed. In the second method which includes the first method also, we compensate the time varying impedance using conjugate impedance in one arm of the Wheatstone bridge. This bridge also serves the purpose of isolation between Modem and power line. The results have been provided by using 20 metres line under varying load conditions which includes open, short and various impedances which typically matches with that of a power line in an automotive scenario.

Keywords: Multi-carrier, OFDM, Intra-vehicular communication, power-line communication.

| DOI: 10.17148/IJIREEICE.2020.8518