Closed-form sum-MSE minimization for the two-user Gaussian MIMO broadcast channel
2011 (English)In: IEEE Communications Letters, ISSN 1089-7798, Vol. 15, no 9, 950-952 p.Article in journal (Refereed) Published
We study the Gaussian multiple-input, multiple-output broadcast channel, where a base station with N(T) antennas transmits K independent messages to K users, each having a single receive antenna. The messages consist of independent, identically distributed Gaussian random variables and we study linear transmission with an end-to-end distortion criterion. By using an already established uplink/downlink duality and a recently discovered special relation between beamforming vectors and channel vectors, we present a closed-form expression for the optimal power allocation in the two-user case. We also outline an iterative algorithm that finds the optimal power allocation for an arbitrary number of users.
Place, publisher, year, edition, pages
IEEE , 2011. Vol. 15, no 9, 950-952 p.
MIMO systems, mean square error, linear transmission, power allocation
IdentifiersURN: urn:nbn:se:kth:diva-33403DOI: 10.1109/LCOMM.2011.070711.110571ISI: 000294894500016ScopusID: 2-s2.0-80052836672OAI: oai:DiVA.org:kth-33403DiVA: diva2:415073
FunderSwedish Research Council, 621-2010-4428ICT - The Next GenerationKnut and Alice Wallenberg FoundationICT - The Next Generation
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