@inproceedings{eee5326bfbcf4ee083c7f50ca45772b1,
title = "Energy-aware subchannel assignment in OFDMA system with proportional rate constraints",
abstract = "We propose a new subchannel assignment algorithm for the problem of energy-efficient allocation of subchannels and powers to users for a single-cell OFDMA downlink transmission. It is well known that the joint allocation of subchannels and power for maximizing the energy efficiency of transmission is time-consuming due to the non-convexity of the objective function. Recently, the problem of energy-efficient resource allocation OFDMA-based downlink transmission has been formulated as a two-step allocation process: the first step for subchannel assignment and the second step for power allocation. This paper proposes a low-complexity suboptimal algorithm for assigning subchannels. Applying the Charnes-Cooper Transformation technique and by using the outcome of the proposed subchannel assignment algorithm, we are able to allocate optimum power for each user by solving a single-variable non-linear equation under proportional rate constraints. Numerical results demonstrate that the proposed subchannel assignment algorithm improves both energy and spectral efficiencies compared to the existing ones in the literature.",
author = "Chien, {Su Fong} and Tham, {Mau Luen} and Ting, {Tiew On} and Kim, {Kyeong Soo}",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 24th Wireless and Optical Communication Conference, WOCC 2015 ; Conference date: 23-10-2015 Through 24-10-2015",
year = "2015",
month = dec,
day = "2",
doi = "10.1109/WOCC.2015.7346195",
language = "English",
series = "2015 24th Wireless and Optical Communication Conference, WOCC 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "149--153",
booktitle = "2015 24th Wireless and Optical Communication Conference, WOCC 2015",
}
