Performance Analysis of Adaptive Bandwidth and Subcarrier Allocation Scheme for a Multi-user OFDM System 


Vol. 31,  No. 11, pp. 1113-1119, Nov.  2006


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  Abstract

For a multi-user OFDM system in mobile channels which requires low-complexity in adaptive resource allocations, resource allocation algorithm using multi-threshold is proposed. The allocation scheme, which is performed by the multi-threshold values in descending order, considers only subcarriers over each threshold level. Moreover, some subcarriers with the lowest channel gain can be removed in the present threshold level within the constraint of satisfaction of the required data rate, in order to allocate them to the other users when the allocation process of next threshold is executed. As a result, the proposed bandwidth and subcarrier algorithm has better system performances than the conventional allocation schemes in terms of required power and processing time, which is expected as a technique that improves the spectral efficiency of OFDM systems in a mobile environment.

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  Cite this article

[IEEE Style]

Y. J. Lim and S. K. Park, "Performance Analysis of Adaptive Bandwidth and Subcarrier Allocation Scheme for a Multi-user OFDM System," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 11, pp. 1113-1119, 2006. DOI: .

[ACM Style]

Yeon Ju Lim and Sang Kyu Park. 2006. Performance Analysis of Adaptive Bandwidth and Subcarrier Allocation Scheme for a Multi-user OFDM System. The Journal of Korean Institute of Communications and Information Sciences, 31, 11, (2006), 1113-1119. DOI: .

[KICS Style]

Yeon Ju Lim and Sang Kyu Park, "Performance Analysis of Adaptive Bandwidth and Subcarrier Allocation Scheme for a Multi-user OFDM System," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 11, pp. 1113-1119, 11. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880