@inproceedings{4d0dfb33b1d1460986da8e3ff2707227,
title = "Energy-efficient resource allocation for SWIPT in multiple access channels",
abstract = "In this paper, we study optimal resource allocation strategies for simultaneous information and power transfer (SWIPT) focusing on the system energy efficiency. We consider two-user multiple access channels in which energy harvesting (EH) and information decoding (ID) nodes are spatially separated. We formulate optimization problems that maximize system energy efficiency while taking harvested energy constraints into account. These are concave-linear fractional problems, and hence Karush-Kuhn-Tucker (KKT) conditions are necessary and sufficient to obtain globally optimal solution. Solving these optimization problems, we provide analytical expressions for optimal transmit power allocation among the source nodes, and identify the corresponding energy efficiency. We confirm the theoretical analysis via numerical results. Furthermore, we also characterize the effect of circuit power consumption on the system's efficiency as the harvested energy demand varies.",
keywords = "Energy efficiency, Multiple access, Throughput, Wireless information and power transfer",
author = "Zewde, {Tewodros A.} and Gursoy, {M. Cenk}",
note = "Publisher Copyright: {\textcopyright} 2016 IEEE.; 50th Annual Conference on Information Systems and Sciences, CISS 2016 ; Conference date: 16-03-2016 Through 18-03-2016",
year = "2016",
month = apr,
day = "26",
doi = "10.1109/CISS.2016.7460509",
language = "English (US)",
series = "2016 50th Annual Conference on Information Systems and Sciences, CISS 2016",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "246--251",
booktitle = "2016 50th Annual Conference on Information Systems and Sciences, CISS 2016",
}