Reference : Exploiting Long-term Statistics in Spatially Correlated Multi-user MIMO Systems with ...
Scientific congresses, symposiums and conference proceedings : Paper published in a book
Engineering, computing & technology : Computer science
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/14534
Exploiting Long-term Statistics in Spatially Correlated Multi-user MIMO Systems with Quantized Channel Norm Feedback
English
Björnson, Emil [> >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
2008
Proceedings IEEE International Conference on Acoustics, Speech, and Signal (ICASSP)
3117–3120
Yes
Proceedings IEEE International Conference on Acoustics, Speech, and Signal (ICASSP)
April 2008
[en] Array signal processing ; Feedback ; MIMO systems ; Mobile communication ; Spatial division multiple access
[en] In wireless multiple antenna and multi-user systems, the spatial dimensions may be exploited to increase the performance by means of antenna gain, spatial diversity, and multi-user diversity. A limiting factor in such systems is the channel information required by the transmitter to control the intra-cell interference. Herein, the properties of spatially correlated channels with longterm statistical information at the transmitter and fixed-rate feedback of the quantized Euclidean channel norm are analyzed using a spectral subspace decomposition framework. A spatial division multiple access scheme is proposed with interference suppression at the receiver and joint scheduling and zero-forcing beamforming at the transmitter. Closed-form expressions for first and second moments of the feedback conditional channel statistics are derived. It is shown that only a few bits of feedback are required to achieve reliable rate estimation and weighted sum-rate maximization.
http://hdl.handle.net/10993/14534

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