An Optimal Determination of Subband-Frame Size and Mode Switching Level for Adaptive OFDM-TDD System 


Vol. 30,  No. 6, pp. 512-522, Jun.  2005


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  Abstract

In this paper, an optimal determination method of the subband-frame size and mode-switching level is proposed for adaptive OFDM-TDD systems in frequency-selective time-varying channels. The optimization problem considering frequency selectivity, user’s mobility, and the signaling overhead caused by the mode change information is formulated in the maximum spectral efficiency sense satisfying the target BER. Assuming that subband-frame size is given, the mode-switching level is first optimized so that the spectral efficiency can be maximized satisfying the target BER. The subband-frame size among candidates is then determined, which maximizes the spectral efficiency. Simulation results show that the proposed scheme outperforms conventional schemes, in terms of the spectral efficiency and the BER.

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  Cite this article

[IEEE Style]

K. Shin, C. Lee, J. Kim, H. Kim, "An Optimal Determination of Subband-Frame Size and Mode Switching Level for Adaptive OFDM-TDD System," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 6, pp. 512-522, 2005. DOI: .

[ACM Style]

Kil-Ho Shin, Chang-Suk Lee, Jung-Gon Kim, and Hyung-Myung Kim. 2005. An Optimal Determination of Subband-Frame Size and Mode Switching Level for Adaptive OFDM-TDD System. The Journal of Korean Institute of Communications and Information Sciences, 30, 6, (2005), 512-522. DOI: .

[KICS Style]

Kil-Ho Shin, Chang-Suk Lee, Jung-Gon Kim, Hyung-Myung Kim, "An Optimal Determination of Subband-Frame Size and Mode Switching Level for Adaptive OFDM-TDD System," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 6, pp. 512-522, 6. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880