Communication channel modeling of controller area network (CAN)

Controller area network (CAN) has been widely used for in-vehicle network. The demand of data rate of invehicle network has risen sharply, while traditional CAN communication cannot support this demand of data rate with limited bandwidth around DC. To overcome the limitation, passband communication systems can be considered where wider bandwidth may be available. In order to use the passband, we need to understand and analyze CAN communication channel. However, since real measurement of the channel response takes so much time and efforts, it will be convenient if channel modeling of CAN communication system is available. In this paper, we perform modeling of passband CAN communication systems in case of end-to-end topology by using transmission matrix and cascade of two port network methods. Instead of real measurement, we expect to reduce the time and efforts significantly to obtain a passband CAN communication channel response by using the channel modeling result. Finally, we suggest the range of frequency band and bridge tap lengths for designing CAN communication systems.