Modelling and Analysis of Nonstationary Vehicle-to-Infrastructure Channels with Time-Variant Angles of Arrival

Abstract EN

In mobile radio channel modelling, it is generally assumed that the angles of arrival (AOAs) are independent of time.

This assumption does not in general agree with real-world channels in which the AOAs vary with the position of a moving receiver.

In this paper, we first present a mathematical model for the time-variant AOAs.

This model serves as the basis for the development of two nonstationary multipath fading channels models for vehicle-to-infrastructure communications.

The statistical properties of both channel models are analysed with emphasis on the time-dependent autocorrelation function (ACF), time-dependent mean Doppler shift, time-dependent Doppler spread, and the Wigner-Ville spectrum.

It is shown that these characteristic quantities are greatly influenced by time-variant AOAs.

The presented analytical framework provides a new view on the channel characteristics that goes well beyond ultra-short observation intervals over which the channel can be considered as wide-sense stationary.