Orthogonalized Spatial Multiplexing for MIMO Systems

In this paper, we propose a new spatial multiplexing scheme for transmission over flat-fading multiple-input multiple-output (MIMO) channels, which allows a simple maximum-likelihood decoding at the receiver with small feedback information. We begin with a real-valued representation of the complex-v...

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Bibliographic Details
Published inIEEE Vehicular Technology Conference pp. 1 - 5
Main Authors Heunchul Lee, Seokhwan Park, Inkyu Lee
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2006
Subjects
Closed loop systems
Computational complexity
Decoding
Euclidean distance
Feedback
MIMO
OFDM
Receiving antennas
Transmitters
Transmitting antennas
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Summary:In this paper, we propose a new spatial multiplexing scheme for transmission over flat-fading multiple-input multiple-output (MIMO) channels, which allows a simple maximum-likelihood decoding at the receiver with small feedback information. We begin with a real-valued representation of the complex-valued system model and show that we can achieve orthogonality between transmitted signals by applying a proper rotation to transmitted symbols. Based on the minimum Euclidean distance between received vectors, we also present a simple antenna selection metric for the proposed spatial multiplexing systems. Simulation results demonstrate that our spatial multiplexing system performs close to the optimum closed loop system with much reduced complexity and feedback overhead.
ISBN:9781424400621
1424400627
ISSN:1090-3038
2577-2465
DOI:10.1109/VTCF.2006.65