Delay Determination of Cyclic Delay Diversity for Multi-user Scheduling in OFDMA Systems 


Vol. 33,  No. 3, pp. 248-255, Mar.  2008


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  Abstract

In an OFDMA system the performance of multi-user scheduling in the frequency domain is affected by the frequency selectivity of the channel. If the channel is too flat in the frequency domain, the multi-user scheduling gain might be degraded. On the contrary, if the frequency selectivity is too high and the magnitude of the frequency response severely fluctuates on the allocation bandwidth, it is also hard to get sufficient scheduling gain. For maximizing the multi-user scheduling gain, a cyclic delay diversity technique can be used to adjust the frequency selectivity of the channel. This paper proposes a method to determine the optimal delay value of cyclic delay diversity according to the allocation bandwidth and the channel characteristics.

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  Cite this article

[IEEE Style]

M. Rim, S. Hur, H. Song, D. Lim, B. Jeong, T. Noh, "Delay Determination of Cyclic Delay Diversity for Multi-user Scheduling in OFDMA Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 3, pp. 248-255, 2008. DOI: .

[ACM Style]

Min-Joong Rim, Seong-Ho Hur, Hyun-joo Song, Dae-Woon Lim, Byung-Jang Jeong, and Taegyun Noh. 2008. Delay Determination of Cyclic Delay Diversity for Multi-user Scheduling in OFDMA Systems. The Journal of Korean Institute of Communications and Information Sciences, 33, 3, (2008), 248-255. DOI: .

[KICS Style]

Min-Joong Rim, Seong-Ho Hur, Hyun-joo Song, Dae-Woon Lim, Byung-Jang Jeong, Taegyun Noh, "Delay Determination of Cyclic Delay Diversity for Multi-user Scheduling in OFDMA Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 3, pp. 248-255, 3. 2008.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880