2nd International Workshop on Physics-Inspired Paradigms in Wireless Communications and Networks

Research Article

Transmit Beamforming and Power Allocation for Downlink OFDMA Systems

Cite
BibTeX Plain Text
  • @INPROCEEDINGS{10.1109/WIOPT.2009.5291589,
    author={Kazunori Hayashi and Takeshi Fujii and Megumi Kaneko and Hideaki Sakai and Yoji Okada},
    title={Transmit Beamforming and Power Allocation for Downlink OFDMA Systems},
    proceedings={2nd International Workshop on Physics-Inspired Paradigms in  Wireless Communications and Networks},
    publisher={IEEE},
    proceedings_a={PHYSCOMNET},
    year={2009},
    month={10},
    keywords={Terms---OFDMA transmit beamforming power allocation iterative water-filling},
    doi={10.1109/WIOPT.2009.5291589}
}
  • Kazunori Hayashi
    Takeshi Fujii
    Megumi Kaneko
    Hideaki Sakai
    Yoji Okada
    Year: 2009
    Transmit Beamforming and Power Allocation for Downlink OFDMA Systems
    PHYSCOMNET
    IEEE
    DOI: 10.1109/WIOPT.2009.5291589
Kazunori Hayashi1,*, Takeshi Fujii1,*, Megumi Kaneko1,*, Hideaki Sakai1,*, Yoji Okada2,*
  • 1: Graduate School of Informatics, Kyoto University, Yoshida Honmachi Sakyo-ku, Kyoto, 606-8501, JAPAN
  • 2: Sumitomo Electric Industries, Ltd. Kitahama, Chuo-ku, Osaka, 541-0041, JAPAN
*Contact email: kazunori@sys.i.kyoto-u.ac.jp, takec_18@sys.i.kyoto-u.ac.jp, meg@sys.i.kyoto-u.ac.jp, hsakai@sys.i.kyoto-u.ac.jp, okada-yoji@sei.co.jp

Abstract

This paper considers a transmit beamforming and subcarrier power allocation method for orthogonal frequency division multiple access (OFDMA) systems. As the beamforming vector control criterion, we employ the maximization of so-called signal-to-leakage-plus-noise ratio (SLNR) at each base station, which enable us to obtain closed form beamforming vector by using only locally available information. We also discuss the local optimality of the SLNR based beamforming vector. As for the subcarrier power allocation, two different approaches are employed, namely, the equalization of signal-to-interferenceplus- noise ratio (SINR) for subcarriers and the maximization of sum rate of subcarriers. Computer simulation results show the validity of the transmit beamforming and power allocation method with highlighting the difference between the two power allocation algorithms

Keywords
Terms—OFDMA transmit beamforming power allocation iterative water-filling
Published
2009-10-23
Publisher
IEEE
Modified
2010-05-16
http://dx.doi.org/10.1109/WIOPT.2009.5291589
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