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Approximate transmit covariance optimization of MIMO systems with covariance feedback
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0003-2298-6774
2003 (English)In: CONFERENCE RECORD OF THE THIRTY-SEVENTH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS & COMPUTERS, 2003, 1047-1051 p.Conference paper, Published paper (Refereed)
Abstract [en]

The data rate of a multiple input, multiple output (MIMO) communication link can be improved if knowledge about the channel statistics is exploited at the transmitter. However, many realistic system scenarios require computationally prohibitive Monte Carlo methods in order to optimize the transmit covariance for maximization of the exact mutual information. This paper instead considers an approximative approach to maximize the performance of a communication link where covariance feedback is available at the transmitter. The algorithm presented is based on an asymptotic expression of the mutual information that allows for correlation at both the transmit and the receive side of the system. From simulations we demonstrate significant gain over beamforming and pure diversity schemes in many realistic system scenarios.

Place, publisher, year, edition, pages
2003. 1047-1051 p.
Series
Conference record of the Asilomar conference on signals, systems and computers, ISSN 1058-6393
National Category
Computer Science Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-34980ISI: 000189498700195OAI: oai:DiVA.org:kth-34980DiVA: diva2:426954
Note
QC 20110627Available from: 2011-06-27 Created: 2011-06-17 Last updated: 2011-06-27Bibliographically approved

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Ottersten, Björn

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