EMA: Energy-Efficiency-Aware Multiple Access

Author

Jingon Joung ; Sumei Sun

Author_Institution

Inst. for Infocomm Res. (I2R), A*STAR, Singapore, Singapore

Volume

18

Issue

6

fYear

2014

fDate

41791

Firstpage

1071

Lastpage

1074

Abstract

To improve the energy efficiency (EE) of an orthogonal frequency-division multiple access system with multiple transmit antennas supporting multiple single-receive-antenna users, we propose an EE-aware multiple access (EMA) scheme. The EMA selects an energy-efficient channel access method that is either time-division multiple access (TDMA) or space-division multiple access (SDMA) for each subband. For the SDMA, the near optimal number of SDMA time slots is derived. Numerical results verify that the EE of pure TDMA and SDMA can be significantly improved through the proposed EMA scheme.

Keywords

antenna arrays; frequency division multiple access; space division multiple access; telecommunication power management; time division multiple access; transmitting antennas; EMA; OFDMA; SDMA time slots; TDMA; energy efficiency aware multiple access; energy efficient channel access; orthogonal frequency division multiple access system; space division multiple access; time division multiple access; transmit antennas; Complexity theory; Manganese; OFDM; Resource management; Time division multiple access; Vectors; Energy efficiency (EE); channel access method; multiple access method; orthogonal frequency-division multiple access (OFDMA); space-division multiple access (SDMA); time-division multiple access (TDMA);

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.2319811

Filename

6804633