Optimal precoding for orthogonalized spatial multiplexing in MIMO wireless systems

Young Tae Kim, Heunchul Lee, Seokhwan Park, Inkyu Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


This paper proposes a new precoding algorithm for orthogonalized spatial multiplexing (OSM) systems over flat-fading multiple-input multiple-output (MIMO) channels. The OSM scheme was recently introduced for closed-loop MIMO systems which allows single symbol decodability for maximum likelihood detection. To further improve the performance in OSM systems, we propose a new precoding method. For identifying the parameters of a precoder, we introduce a partitioning approach on the minimum Euclidean distance between constellation points in the effective channel. Also, it is shown that two real value parameters and one bit are required for feedback information in 4-QAM systems. Simulation results demonstrate that our precoding algorithm allows us to significantly improve the system performance with small increase of feedback values. We also confirm through simulations that the performance of the proposed scheme is the same as the optimum closed-loop MIMO systems.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
Number of pages5
Publication statusPublished - 2008 Sep 12
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: 2008 May 192008 May 23


OtherIEEE International Conference on Communications, ICC 2008


ASJC Scopus subject areas

  • Media Technology

Cite this

Kim, Y. T., Lee, H., Park, S., & Lee, I. (2008). Optimal precoding for orthogonalized spatial multiplexing in MIMO wireless systems. In IEEE International Conference on Communications (pp. 4739-4743). [4533924] https://doi.org/10.1109/ICC.2008.888