Capacity of the MIMO Broadcast Channel Under Realistic Propagation Conditions

Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany

Proceedings: PIMRC 2005

Pages: 5Language: englishTyp: PDF

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Fügen, T.; Kuhnert, C.; Wiesbeck, W. (Institut für Höchstfrequenztechnik und Elektronik (IHE), Universität Karlsruhe (TH), 76128 Karlsruhe, Germany)

In this paper simulation results of the multiuser MIMO broadcast channel are presented. The MIMO broadcast channel corresponds to the downlink case where the base station sends simultaneously different information to several users in the cell. In contrast to many information theoretical studies, the presented results are based on a realistic MIMO channel model and are therefore a first step towards realistic performance evaluations. The channel model is called multiuser double-directional channel model (MDDCM) and was introduced recently. It is based on a geometry approach with fixed scatterers. It enables a realistic describtion of the desired link as well as the spatiallycolored interference in a macro-cellular environment. Based on the MDDCM the sum capacity of the MIMO broadcast channel for a varying number of users and varying antenna configurations in an isolated communication cell is presented. To achieve the sum capacity the duality to the MIMO multiple access channel is used.