Multi-User MIMO Multi-Cell Systems: Finite SNR Rate Loss Analysis

Conference: WSA 2013 - 17th International ITG Workshop on Smart Antennas
03/13/2013 - 03/14/2013 at Stuttgart, Deutschland

Proceedings: WSA 2013

Pages: 4Language: englishTyp: PDF

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Wunder, Gerhard; Raghuprakash, Supreeth (Heinrich Hertz Institute, Dep. of Wireless Communication and Networks, Berlin, Germany)
Schreck, Jan; Jung, Peter (Technische Universität Berlin, Lehrstuhl für Informationstheorie und Theoretische Informationstechnik, Berlin, Germany)

The rate loss gap due to imperfect channel state information at the transmitter in a multi-user MIMO multi-cell system is analyzed. Results from [1] are generalized for systems incorporating user selection and an arbitrary beamforming scheme. It is found that, if the transmitter is allowed to perform a user selection and uses an arbitrary beamforming scheme, the same scaling of the rate loss gap can be achieved if the feedback bits are doubled.