Title :
Energy Efficiency of Bandwidth Expansion Algorithms in Wireless Communication Systems
Author :
Yung-Fa Huang ; Chuan-bi Lin ; Chia-Chi Chang ; Che-Hao Li ; Ching-Mu Chen
Author_Institution :
Dept. of Inf. & Commun. Eng., Chaoyang Univ. of Technol., Taichung, Taiwan
Abstract :
In this paper, the effective bandwidth expansion schemes are investigated to improve the performance of energy efficiency for the Orthogonal Frequency Division Multiplexing (OFDM) wireless communication systems. Three Improved Energy Efficient Bandwidth Expansion (IEEBE) schemes are proposed to assign the available system bandwidth for users. With an exhausted method, the energy efficient Bandwidth Expansion Coefficient (BEC) can be found. Thus the energy efficient performance of the IEEBE is superior to the Same Bandwidth Expansion (SBE). Three methods of pairs, grouping and two-layer grouping are proposed to effectively find the BEC for users based on IEEBE. Simulation results show that two-layer grouping (TLG) outperforms the other two methods and improves Energy Reduction Factor (ERF) by 8.9 % to the SBE.
Keywords :
OFDM modulation; bandwidth allocation; radiocommunication; ERF; IEEBE scheme; OFDM wireless communication systems; SBE; TLG; energy reduction factor; energy-efficient BEC; energy-efficient bandwidth expansion coefficient; improved energy-efficient bandwidth expansion scheme; orthogonal frequency division multiplexing; same bandwidth expansion; system bandwidth assignment; two-layer grouping; Algorithm design and analysis; Bandwidth; Energy consumption; Energy efficiency; OFDM; Signal to noise ratio; Wireless communication; OFDM; bandwidth expansion; energy efficiency; wireless communication systems;
Conference_Titel :
Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS), 2014 Eighth International Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-4799-4333-3
DOI :
10.1109/IMIS.2014.67
