Improved Power Allocation to Enhance the Capacity in OFDMA System for Proportional Resource Allocation 


Vol. 38,  No. 7, pp. 580-591, Jul.  2013


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  Abstract

The Orthogonal Frequency Division Multiple Access (OFDMA) is considered as a novel modulation and multiple access technique for 4th generation wireless systems. In this paper, we formulate a base station’s power allocation algorithm for each user to maximize the user’s sum rate, subject to constraints on total power, bit error rate, and rate proportionality among the users for a better proportional rate adaptive (RA) resource allocation method for OFDMA based system. We propose a novel power allocation method based on the proportion of subcarrier allocation and the user’s normalized proportionality constant. We adapt a greedy algorithm and waterfilling technique for allocating the subcarriers among the users. In an end-to-end simulation, we validate that the proposed technique has higher system capacity and lower CPU execution times, while maintaining the acceptable rate proportionality among users.

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  Cite this article

[IEEE Style]

P. Var, R. Shrestha, J. Kim, "Improved Power Allocation to Enhance the Capacity in OFDMA System for Proportional Resource Allocation," The Journal of Korean Institute of Communications and Information Sciences, vol. 38, no. 7, pp. 580-591, 2013. DOI: .

[ACM Style]

Puthnith Var, Robin Shrestha, and JaeMoung Kim. 2013. Improved Power Allocation to Enhance the Capacity in OFDMA System for Proportional Resource Allocation. The Journal of Korean Institute of Communications and Information Sciences, 38, 7, (2013), 580-591. DOI: .

[KICS Style]

Puthnith Var, Robin Shrestha, JaeMoung Kim, "Improved Power Allocation to Enhance the Capacity in OFDMA System for Proportional Resource Allocation," The Journal of Korean Institute of Communications and Information Sciences, vol. 38, no. 7, pp. 580-591, 7. 2013.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880