TY - JOUR
T1 - UAV-assisted wireless powered relay networks with cyclical NOMA-TDMA
AU - Hadži-Velkov, Zoran
AU - Pejoski, Slavche
AU - Zlatanov, Nikola
AU - Schobert, Robert
PY - 2020/12
Y1 - 2020/12
N2 - We optimize the performance of an unmanned aerial vehicle (UAV)-assisted wireless powered relay network (WPRN), where the UAV is used as a radio-frequency (RF) power transmitter and as a communication relay between energy harvesting users (EHUs) and a base station (BS). The EHUs are assigned to radial service sectors, centered around the base station (BS), and employ a combination of non-orthogonal multiple access (NOMA) and time-division multiple access (TDMA), referred to as cyclical NOMA-TDMA, for multiple access. For performance optimization, maximization of the sum rate in all service sectors and maximization of the minimal sum rate per service sector are considered, and the optimal radii of the UAV's circular trajectory and the optimal allocation of the UAV's transmit power across the service sectors are determined.
AB - We optimize the performance of an unmanned aerial vehicle (UAV)-assisted wireless powered relay network (WPRN), where the UAV is used as a radio-frequency (RF) power transmitter and as a communication relay between energy harvesting users (EHUs) and a base station (BS). The EHUs are assigned to radial service sectors, centered around the base station (BS), and employ a combination of non-orthogonal multiple access (NOMA) and time-division multiple access (TDMA), referred to as cyclical NOMA-TDMA, for multiple access. For performance optimization, maximization of the sum rate in all service sectors and maximization of the minimal sum rate per service sector are considered, and the optimal radii of the UAV's circular trajectory and the optimal allocation of the UAV's transmit power across the service sectors are determined.
KW - multiple access techniques
KW - relaying
KW - unmanned aerial vehicles
KW - Wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=85097712770&partnerID=8YFLogxK
U2 - 10.1109/LWC.2020.3013296
DO - 10.1109/LWC.2020.3013296
M3 - Article
AN - SCOPUS:85097712770
SN - 2162-2337
VL - 9
SP - 2088
EP - 2092
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 12
ER -