An Iterative Water-Filling Based Resource Allocation Scheme in OFDMA Systems for Energy Efficiency Optimization

Author

Feng, Zhiyong ; Wei, Zhiqing ; Shuai, Tianping ; Zhang, Qixun ; Li, Rong

Author_Institution

Key Lab. of Universal Wireless Commun., Wireless Technol. Innovation Inst. (WTI), Beijing, China

fYear

2012

fDate

3-6 Sept. 2012

Firstpage

1

Lastpage

5

Abstract

In this paper, the subcarrier and power allocation problem for energy efficiency maximization is addressed, which is different from traditional throughout maximization. Lagrangian dual decomposition (LDD) is applied in this problem and a multilevel water-filling for power allocation is derived. But the water-filling in this paper is a transcendental equation, which is different from traditional water-filling form. To solve this equation, fixed point iteration is applied. Besides, a sufficient condition for the existence of the fixed point is derived and joint resource allocation algorithms are designed. Finally, numerical results verify our work and the energy efficiency is improved compared with the capacity maximization scheme.

Keywords

OFDM modulation; energy conservation; frequency division multiple access; Lagrangian dual decomposition; OFDMA systems; capacity maximization scheme; energy efficiency maximization; energy efficiency optimization; fixed point iteration; iterative water-filling based resource allocation scheme; power allocation problem; Algorithm design and analysis; Convergence; Energy consumption; Equations; Mathematical model; Power demand; Resource management;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2012 IEEE

Conference_Location

Quebec City, QC

ISSN

1090-3038

Print_ISBN

978-1-4673-1880-8

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VTCFall.2012.6399020

Filename

6399020