自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 22    No. 8    August 2015

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Fair subcarrier-power allocation scheme for multiuser multicarrier systems
Mohammed Abd-Elnaby1, Germien G. Sedhom1, Nagy W. Messiha1, Xu Zhu2, Fathi E. Abd El-Samie1

1. Faculty of Electronic Engineering, Menoufia University, Menouf 32952, Egypt;
2. Deptartment of Electrical Engineering and Electronics, University of Liverpool, L69 3GJ, UK

Abstract:The main objective of multiuser orthogonal frequency division multiple access (MU-OFDM) is to maximize the total system capacity in wireless communication systems. Thus, the problem in MU-OFDM system is the adaptive allocation of the resources (subcarriers, bits and power) to different users subject to several restrictions to maximize the total system capacity. In this work, a proposed subcarrier allocation algorithm was presented to assign the subcarriers with highest channel gain to the users. After the subcarrier allocation, subcarrier gain-based power allocation (SGPA) was employed for power and bit loading. The simulation results show that the proposed subcarrier-power allocation scheme can achieve high total system capacity and good fairness in allocating the resources to the users with slightly high computational complexity compared to the existing subcarrier allocation algorithms.

 

Key words: multiuser orthogonal frequency division multiple access (MU-OFDM); subcarrier-allocation; power allocation; fairness; capacity

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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