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2008

Optimal precoding for orthogonalized spatial multiplexing in closed-loop MIMO systems

8 years 5 months ago
Optimal precoding for orthogonalized spatial multiplexing in closed-loop MIMO systems
In this paper, we propose a new precoding algorithm for orthogonalized spatial multiplexing (OSM) systems over flatfading multiple-input multiple-output (MIMO) channels. The OSM scheme was recently introduced for closed-loop MIMO systems which allows single symbol decodable maximum likelihood detection. To further improve the performance of the OSM system, we propose a new precoding method by maximizing the minimum Euclidean distance between constellation points in the effective channel. In order to efficiently identify the parameters of a precoder which maximizes the minimum distance, we introduce a partitioning approach. Through analysis, it is shown that one real value parameter and two bits are required for feedback information for precoding in 16-QAM systems. Simulation results demonstrate that our algorithm provides 9dB and 7.5dB gains at a bit error rate (BER) of 10-4 over the conventional OSM systems for 4-QAM and 16-QAM, respectively. We also confirm that the performance of th...
Young-Tae Kim, Heunchul Lee, Seokhwan Park, Inkyu
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2008
Where JSAC
Authors Young-Tae Kim, Heunchul Lee, Seokhwan Park, Inkyu Lee
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