Linear precoding for mutual information maximization in MIMO systems

Authors:
Meritxell Lamarca
Affiliations:
Signal Theory and Communications Department, Technical University of Catalonia, Barcelona, Spain and ECE Department, University of Delaware, Newark, DE
Venue:
ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
Year:
2009

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Abstract

We study the design of linear precoders for maximization of the mutual information in MIMO systems with arbitrary constellations and with perfect channel state information at the transmitter. We derive the structure of the optimum precoder and we show that the mutual information is concave in a quadratic function of the precoder coefficients. An iterative algorithm is also proposed to find this optimum value.