… closedloop power control scheme for a cognitive radio network (… whole power control process
is separated into outer control … IT constraint to a controlled output indicator for the optimized …

… ) cognitive radio network (CRN), we investigate two power optimization problems, ie, network
EE optimization … rate constraints for EE optimization in both centralized and distributed …

… constraint with regard to the aggregate power interference to … coupling between capacity
supply by power control and rate demand by rate control, we present a cross-layer optimization …

… feasible interference region, we propose two power control … Therefore, to avoid this coupling
and decouple the optimiza… an equivalent constraint for the PUs’ protection constraints, …

… of interference constraints: 1) instantaneous interference … power control problem are coupled.
In other words, in order to find the optimum scheduler we need to know the optimum power …

… centralized PC problem combined with interference channel gain … (5) where λ is the KKT
multiplier of the interference constraint … with it without knowing the interference constraint (4). An …

… Unfortunately, as we can see from constraints C1 and C3, the P and τ couple with each …
time allocation for a given power allocation P. Then, the optimal power control problem can be …

… power control problem in cognitive … cognitive radio into satellite terrestrial networks, we
firstly compare the achievable effective capacity of the whole system with/without cognitive radio …

… power allocation are jointly optimized under the transmit power constraints, interference power
… The formulated problem is highly nonconvex due to strong coupling between optimization …

… constraint, the transmit power constraint, and the average interference power constraint. …
To tackle the coupling of variables in (23c), (27), and (29), we introduce slack variables τ[n]=…