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Bit and power loading for spatial multiplexing using partial channel state information
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0003-2298-6774
2004 (English)In: 2004 ITG: WORKSHOP ON SMART ANTENNAS, PROCEEDINGS, NEW YORK: IEEE , 2004, 152-159 p.Conference paper (Other academic) [Artistic work]
Abstract [en]

Using information about the channel at the transmitter can improve the performance of Multi-Input Multi-Output (MIMO) communication systems. When perfect Channel State Information (CSI) is available at the transmitter, data can be multiplexed and optimized over independent spatial channels. However, when the available channel information is imperfect or partial, crosstalk between the spatial channels is inevitable, complicating the design of the transmitted data. This paper presents a novel practical bit and power loading algorithm, Spatial Loading based on Incomplete Channel Estimates (SLICE), that enables the use of partial CSI for spatial multiplexing. An approximation for the Bit Error Rate (BER) of the spatial channels is derived that facilitates the loading. Numerical experiments demonstrate performance improvements compared with methods that do not consider the partial information available.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2004. 152-159 p.
National Category
URN: urn:nbn:se:kth:diva-34979ISI: 000224728800023ScopusID: 2-s2.0-11244264651ISBN: 0-7803-8327-3OAI: diva2:426825
International IEEE/ITG Workshop on Smart Antennas Munich Univ, Munich, GERMANY, MAR 18-19, 2004
QC 20110627Available from: 2011-06-27 Created: 2011-06-17 Last updated: 2011-11-02Bibliographically approved

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