Coverage area prediction of in-car wireless communications employing MB-OFDM UWB systems

This paper investigates the coverage area of MB-OFDM UWB system under in-car propagation environments. The coverage area of each transmission speed to satisfy a certain quality of service (QoS) is predicted by combining the transmission performance of MB-OFDM UWB system with actual in-car propagation characteristics. Since the transmission performance of MB-OFDM strongly depends on the delay spread, the coverage area prediction takes into account the delay spread based on the distance between the transmitter and the receiver, as well as the propagation loss. The coverage area in the occupied scenario with four passengers is compared with that in the empty scenario. Computer simulation results show that the coverage area in the occupied scenario turns out to be much smaller than that in the empty scenario due to the large propagation loss and the decrease in the delay spread.