[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.6109/jicce.2010.8.6.651

Power Randomization Schemes for Random Beamforming Based MIMO Systems

Jung, Bang-Chul (Dept. of Information and Communication Engineering and the Institute of Marine Industry, Collage of Marine Science, Gyeongsang National University)
Sung, Kil-Young (Dept. of Information and Communication Engineering and the Institute of Marine Industry, Collage of Marine Science, Gyeongsang National University)

Publication Information

Journal of information and communication convergence engineering / v.8, no.6, 2010 , pp. 651-654 More about this Journal

Abstract

In this paper, we propose two power randomization schemes for the random beamforming (RBF) based MIMO systems in cellular downlink. In the proposed system, a BS randomizes not only the pre-coding matrix but also the power allocation matrix, while the conventional RBF system allocates an equal power to each transmit stream. The proposed water-filling based power randomization scheme (Scheme-I) is proper in the low SNR values and the proposed random-power based randomization scheme (Scheme-II) is proper in the high SNR values. The proposed system with the power randomization outperforms the conventional RBF system which allocates the same power for each data stream.

Keywords

Random beamforming; power allocation; MIMO; cellular system; scheduling;

Citations & Related Records

Reference

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