TY - GEN
T1 - Energy-efficient power allocation for hybrid multiple access systems
AU - Zeng, Ming
AU - Yadav, Animesh
AU - Dobre, Octavia A.
AU - Poor, H. Vincent
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/7/3
Y1 - 2018/7/3
N2 - In this paper, energy-efficient power allocation (PA) is studied for a hybrid system with non- orthogonal multiple access (NOMA) integrated into orthogonal multiple access (OMA). The considered energy efficiency (EE) maximization problem belongs to non-convex fractional functions. To tackle it, the corresponding spectral efficiency maximization problem for a given transmit power is first considered. By changing the variables from power coefficients to user rates, the non-convex problem is transformed into a convex one, for which a closed-form solution is obtained. On this basis, the optimal transmit power is determined to maximize the EE of the system by exploiting the property of pseudo-concave functions. Numerical results are presented to validate the effectiveness of the proposed energy-efficient PA strategy, as well as the superiority of the hybrid MA over OMA in terms of EE.
AB - In this paper, energy-efficient power allocation (PA) is studied for a hybrid system with non- orthogonal multiple access (NOMA) integrated into orthogonal multiple access (OMA). The considered energy efficiency (EE) maximization problem belongs to non-convex fractional functions. To tackle it, the corresponding spectral efficiency maximization problem for a given transmit power is first considered. By changing the variables from power coefficients to user rates, the non-convex problem is transformed into a convex one, for which a closed-form solution is obtained. On this basis, the optimal transmit power is determined to maximize the EE of the system by exploiting the property of pseudo-concave functions. Numerical results are presented to validate the effectiveness of the proposed energy-efficient PA strategy, as well as the superiority of the hybrid MA over OMA in terms of EE.
UR - http://www.scopus.com/inward/record.url?scp=85050298429&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050298429&partnerID=8YFLogxK
U2 - 10.1109/ICCW.2018.8403619
DO - 10.1109/ICCW.2018.8403619
M3 - Conference contribution
AN - SCOPUS:85050298429
T3 - 2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Proceedings
SP - 1
EP - 5
BT - 2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018
Y2 - 20 May 2018 through 24 May 2018
ER -