Orthogonal Frequency Division Multiple Access with Statistical Channel Quality Measurements Part-Ⅱ : Performance Analysis 


Vol. 31,  No. 2, pp. 110-118, Feb.  2006


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  Abstract

In part-Ⅰ of the paper, two sub-channel structures, either contiguous or distributed, were considered. Modeling the SNR distribution over a sub-channel as Ricean in general, the statistical chracteristics were investigated. In this part of the paper, we develop a generalized two step channel/resource allocation algorithm, which incorporates the two statistical measurements, and analyze the spectral efficiency of OFDMA in terms of average frequency utilization for the two sub-channel structures. In OFDMA with distributed structure, the key design parameter would be the sub-channel bandwidth. To give an insight into the impact on this parameter, we show in the numerical results the frequency utilization as a function of sub-channel bandwidth normalized to coherence bandwidth. As confirmed by numerical results, for contiguous sub-channel structure, we obtain the nominal multiuser diversity gain when the sub-channel bandwidth is smaller than the coherence bandwidth and lose the gain as it is getting larger.

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  Cite this article

[IEEE Style]

S. Yoon, "Orthogonal Frequency Division Multiple Access with Statistical Channel Quality Measurements Part-Ⅱ : Performance Analysis," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 2, pp. 110-118, 2006. DOI: .

[ACM Style]

Seokhyun Yoon. 2006. Orthogonal Frequency Division Multiple Access with Statistical Channel Quality Measurements Part-Ⅱ : Performance Analysis. The Journal of Korean Institute of Communications and Information Sciences, 31, 2, (2006), 110-118. DOI: .

[KICS Style]

Seokhyun Yoon, "Orthogonal Frequency Division Multiple Access with Statistical Channel Quality Measurements Part-Ⅱ : Performance Analysis," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 2, pp. 110-118, 2. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880