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Energy and spectral efficiency trade‐off for the downlink OFDM‐distributed antenna systems
Author(s) -
He Chunlong,
Sheng Bin,
You Xiaohu
Publication year - 2014
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2545
Subject(s) - telecommunications link , computer science , orthogonal frequency division multiplexing , spectral efficiency , efficient energy use , optimization problem , mathematical optimization , energy (signal processing) , power (physics) , electronic engineering , telecommunications , algorithm , mathematics , electrical engineering , engineering , statistics , beamforming , channel (broadcasting) , physics , quantum mechanics
SUMMARY This paper investigates an energy efficient optimization scheme for the downlink multiuser OFDM‐distributed antenna systems. We adopt a multicriteria optimization method to offer a systematic study on the relationship between spectral efficiency (SE) and energy efficiency (EE). First, we transform the energy efficient optimization problem with high complexity into a simpler downlink multiuser OFDM problem. Then, using the weighted sum method in multicriteria optimization, an optimal energy efficient scheme is presented to allocate the available power to balance the trade‐off between SE and EE efficiently. Simulation results demonstrate that the energy efficient scheme is effective, and there existed a trade‐off between SE and EE in the downlink multiuser OFDM‐distributed antenna systems. Copyright © 2013 John Wiley & Sons, Ltd.