TY - GEN
T1 - Energy-efficient resource allocation for SWIPT in multiple access channels
AU - Zewde, Tewodros A.
AU - Gursoy, M. Cenk
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/4/26
Y1 - 2016/4/26
N2 - 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.
AB - 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.
KW - Energy efficiency
KW - Multiple access
KW - Throughput
KW - Wireless information and power transfer
UR - http://www.scopus.com/inward/record.url?scp=84992364827&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84992364827&partnerID=8YFLogxK
U2 - 10.1109/CISS.2016.7460509
DO - 10.1109/CISS.2016.7460509
M3 - Conference contribution
AN - SCOPUS:84992364827
T3 - 2016 50th Annual Conference on Information Systems and Sciences, CISS 2016
SP - 246
EP - 251
BT - 2016 50th Annual Conference on Information Systems and Sciences, CISS 2016
T2 - 50th Annual Conference on Information Systems and Sciences, CISS 2016
Y2 - 16 March 2016 through 18 March 2016
ER -