A new utility based subcarrier and power joint allocation scheme in uplink OFDMA systems

被引：2
|
作者：
Yang, Liguo [1 ]
He, Zhiqiang [1 ]
Wang, Lan [1 ]
Wu, Weiling [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Informat Engn, Beijing 100876, Peoples R China
来源：
2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 | 2007年
关键词：
utility-based; OFDMA; power allocation;
D O I：
10.1109/VETECS.2007.566
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, a new utility-based subcarrier and power allocation scheme in uplink OFDMA systems is proposed. The utility function considered here measures the average achieved utility per joule of energy consumed on each subcarrier. The goal is to maximize the system utility in the uplink For the purpose, we formulate an optimization problem subject to the subcarrier and power constraints. It is shown that the system utility is maximized when the subcarrier is allocated to the user with the best "effective channel gain". The numerical results show that the proposals outperform the existing schemes.
引用
收藏
页码：2756 / 2760
页数：5
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