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Optical Engineering

Grouping methods for orthogonal frequency- and space-division multiple access in a radio-on-fiber radio-space transmission system
Author(s): Luong H. Hai; Takeshi Higashino; Katsutoshi Tsukamoto; Shozo Komaki
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Paper Abstract

This paper proposes a radio-on-fiber (RoF) radio-space transmission system. We consider the orthogonal frequency- and space-division multiple access system, in which the orthogonal frequency-division multiple access (OFDMA) and space-division multiple access (SDMA) are combined. In this system, two frequency-channel scheduling schemes are also proposed for OFDMA, and two grouping methods are proposed for SDMA. The performance of the proposed systems is analyzed by computational simulations. It is shown that the random grouping method does not degrade the performance compared with a more complicated grouping method. In the proposed frequency-channel scheduling schemes, the control station estimates all users' signal-to-noise ratios (SNRs), and these schemes allow the system to assign subcarriers to different users according to their channel conditions so that each user can transmit on subcarriers where it has high SNR. Simulation results show that users can avoid frequency-selective fading and achieve higher bit-error-rate performance.

Paper Details

Date Published: 1 September 2007
PDF: 9 pages
Opt. Eng. 46(9) 095006 doi: 10.1117/1.2777166
Published in: Optical Engineering Volume 46, Issue 9
Show Author Affiliations
Luong H. Hai, Osaka Univ. (Japan)
Takeshi Higashino, Osaka Univ. (Japan)
Katsutoshi Tsukamoto, Osaka Univ. (Japan)
Shozo Komaki, Osaka Univ. (Japan)

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