… Moreover, in this paper, we consider imperfect CSI for the energy efficient resource allocation
problem and formulate it as a probability mixed non-convex optimization problem. The …

… , which equals to the total power being allocated to all users. Our problem formulation in
this work is to maximize EE using optimum user power allocation with imperfect CSI. The …

… schemes, the perfect channel state information (CSI) is … a power allocation scheme to
maximize energy efficiency for downlink NOMA heterogeneous networks based on imperfect CSI. …

… It is difficult to obtain exact CSI … Imperfect CSI: Since it is difficult to obtain perfect CSI due
to quantization errors and parametric estimation errors, robust RA schemes with imperfect CSI …

… with imperfect CSI [20], [21] or lacked research on the EE of massive MIMO CRNs [3], [4], [22]–
[25], in this paper, we study an energy-efficient joint power allocation … under imperfect CSI. …

… adaptive modulation and imperfect channel state information (CSI) are investigated … power
allocation (PA) to maximize the SE is firstly formulated subject to the maximum transmit power …

… power allocation problem that maximizes energy efficiency for a Massive MIMO downlink
system with imperfect CSI… an energy-efficient power allocation iterative algorithm for the …

… Under imperfect channel state information (CSI), this article investigates joint optimization
of user selection, power allocation, and the number of activated base station (BS) antennas of …

… power allocation and dynamic power allocation, by considering imperfect channel state
information (CSI… outage probability under imperfect CSI and the power allocation constraints. The …

… of the considered system with imperfect CSI, we first study the … Given the imperfect CSI and
N ≫ 1 antennas, a numerical … power allocation, we can clearly find that increasing transmit …