Ultrawideband channel measurement and modeling for the future intra-vehicle communications

In this article, an ultrawideband channel model within an intra-vehicle environment is investigated.The electromagnetic wave propagation is simulated by full wave method in a three-dimensional car structure. The channel measurement is conducted in frequency domain from 2 to 15 GHz in different scenarios. The calibration process is pointed out to ensure the accuracy in data analysis. The statistical analysis is presented using the channel impulse response calculated via inverse Fourier transform. The small scale features of the intra-vehicle environment are then deduced. An interesting result shows that the delay spreads linearly decrease with the increased passenger number. The clustering channel model is developed based on Saleh-Valenzeula (S-V) model fitting into the vehicular environments with dense clusters and rays.