Modelling and Analysis of Non-Stationary Multipath Fading Channels with Time-Variant Angles of Arrival
Chapter, Peer reviewed
Accepted version
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http://hdl.handle.net/11250/2492846Utgivelsesdato
2017Metadata
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Originalversjon
Paper presented at the 2017 IEEE 85th Vehicular Technology Conference (VTC Spring) 10.1109/VTCSpring.2017.8108201Sammendrag
In mobile radio channel modelling, it is generally assumed that the angles of arrival (AOAs) are independent of time. This assumption does in general not 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 non-stationary multipath fading channels models. 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.