Efficient Adaptive Modulation Technique for Multiuser OFDMA Systems 


Vol. 31,  No. 12, pp. 1240-1248, Dec.  2006


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  Abstract

In this paper, we present a new method for user selection, sub-band allocation, and power allocation in order to maximize the system throughput under the constraint of transmit power in multiuser downlink orthogonal frequency division multiple access (OFDMA) systems with partial channel quality information (CQI). In previous schemes, each user in one cell transmits CQI of all sub-bands to the base station, which requires enormous feedback overhead. Therefore, we propose an efficient power allocation and modulation and coding selection scheme in which each user transmits partial CQI and one additional information to reduce the amount of feedback. Simulation results show that we can greatly reduce the amount of feedback than full feedback system.

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  Cite this article

[IEEE Style]

J. H. Kwon, D. Rhee, I. M. Byun, K. S. Kim, K. C. Whang, "Efficient Adaptive Modulation Technique for Multiuser OFDMA Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 12, pp. 1240-1248, 2006. DOI: .

[ACM Style]

Jung Hyoung Kwon, Duho Rhee, Il Mu Byun, Kwang Soon Kim, and Keum Chan Whang. 2006. Efficient Adaptive Modulation Technique for Multiuser OFDMA Systems. The Journal of Korean Institute of Communications and Information Sciences, 31, 12, (2006), 1240-1248. DOI: .

[KICS Style]

Jung Hyoung Kwon, Duho Rhee, Il Mu Byun, Kwang Soon Kim, Keum Chan Whang, "Efficient Adaptive Modulation Technique for Multiuser OFDMA Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 12, pp. 1240-1248, 12. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880