TY - JOUR
T1 - On power minimization for IRS-Aided downlink NOMA systems
AU - Wang, Hong
AU - Liu, Chen
AU - Shi, Zheng
AU - Fu, Yaru
AU - Song, Rongfang
N1 - Publisher Copyright:
© 2012 IEEE.
PY - 2020/11
Y1 - 2020/11
N2 - Both intelligent reflecting surface (IRS) and non-orthogonal multiple access (NOMA) are the cutting-edge technologies for future wireless communications. In this letter, we examine the effectiveness of IRS in NOMA system with respect to transmit power consumption. Towards this end, the power minimization problem for IRS-aided downlink NOMA system is formulated, taking into consideration the constraint of each user's minimum signal-to-interference-ratio (SINR). To solve the joint power control and IRS phase shifts optimization problem, we first explore the relationship between individual user's transmit power and the variables of phase shifts. Then, we solve the phase shift determination problem via the sequential rotation algorithm. Numerical results show that our designed joint optimization algorithm can significantly reduce the required transmit power when compared with various benchmarking schemes.
AB - Both intelligent reflecting surface (IRS) and non-orthogonal multiple access (NOMA) are the cutting-edge technologies for future wireless communications. In this letter, we examine the effectiveness of IRS in NOMA system with respect to transmit power consumption. Towards this end, the power minimization problem for IRS-aided downlink NOMA system is formulated, taking into consideration the constraint of each user's minimum signal-to-interference-ratio (SINR). To solve the joint power control and IRS phase shifts optimization problem, we first explore the relationship between individual user's transmit power and the variables of phase shifts. Then, we solve the phase shift determination problem via the sequential rotation algorithm. Numerical results show that our designed joint optimization algorithm can significantly reduce the required transmit power when compared with various benchmarking schemes.
KW - IRS
KW - NOMA
KW - phase shift
KW - power allocation
UR - http://www.scopus.com/inward/record.url?scp=85096106706&partnerID=8YFLogxK
U2 - 10.1109/LWC.2020.2999097
DO - 10.1109/LWC.2020.2999097
M3 - Article
AN - SCOPUS:85096106706
SN - 2162-2337
VL - 9
SP - 1808
EP - 1811
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 11
M1 - 9105072
ER -