Abstract
Recently, the third generation partnership standards bodies (3GPP/3GPP2) have defined a two-dimensional
channel model for multiple-input multiple-output (MIMO) systems, where the propagating plane waves are assumed
to arrive only from the azimuthal direction and therefore not include the elevation domain. As a result of this
assumption, the derived angle-of-arrival (AoA) distribution is characterised only by the azimuth direction of these
waves. The AoA distribution of multipaths is implemented with a novel three-dimensional approach. The von Mises-
Fisher (VMF) probability density function is used to describe their distribution within the propagation environment
in both azimuth and co-latitude. More specifically, the proposed model uses a mixture of VMF distributions. A
mixture can be composed of any number of clusters and this is clutter specific. The parameters of the individual
cluster of scatterers within the mixture are derived and an estimation of those parameters is achieved using the
spherical K-means algorithm and also the expectation maximisation algorithm. Statistical tests are provided to
measure the goodness of fit of the proposed model. The results indicate that the proposed model fits well with
MIMO experimental data obtained from a measurement campaign in Germany.
Original language | English |
---|---|
Pages (from-to) | 48-56 |
Number of pages | 9 |
Journal | IET Communications |
Volume | 3 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2009 |
Keywords
- three-dimensional channel model
- spherical statistics
- multiple-input
- multiple-output
- systems