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Throughput aware power-balancing for the MIMO Gaussian MAC

: Michel, T.; Wunder, G.


Institute of Electrical and Electronics Engineers -IEEE-:
8th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2007. CD-ROM : June 17 - 20, 2007, Marina Congress Center, Helsinki, Finland
New York, NY: IEEE, 2007
ISBN: 1-4244-0955-1
5 pp.
Workshop on Signal Processing Advances in Wireless Communications <8, 2007, Helsinki>
Conference Paper
Fraunhofer HHI ()
iterative methods; mimo communication; multi access system; optimisation; radio receiver; radio transmitters; wireless channel

We consider the uplink of a multiple input multiple output (MIMO) system with a large number of transmitters, where perfect channel state information (CSI) is available at the transmitters as well as at the receiver. It is assumed that a certain system throughput has to be achieved independent of the current channel realizations. The objective is to guarantee this throughput with an efficient and fair usage of the available power. We present iterative algorithms allowing the optimization of large systems with more than 100 nodes. This is of particular interest in the context of sensor networks, where many nodes transmit to a central access point and each node's lifetime depends on its energy consumption.