Based on QoS guarantee and maximum transmit power limitation, the maximum sum rate criterion is employed to set the optimal power and further decide whether the D2D users and the CUs can reuse the same resources or not [5].
Together with the maximum transmit power limitation in (6a) and (6b), point A should fall in the square area, which denotes the maximum transmit power constraints in (6a) for CU i and in (6b) for D2D pair j.
The solid target approach presents a maximum power density limitation due to the high thermal stresses which are generated by the huge differential temperatures in the material.
As the first step of the proposed joint power control scheme, in this section, our objective is to determine the maximum transmission power limitation for the small cells almost tightly to serve their users.
But as the first step, we will focus the intra-tier interferences only because we need to get the optimized deployments of small cells by adjusting the maximum transmission power limitation for each small cell BS.
b) p i,j = {p i,j|p i,j ∈ [0, p max BS i )]} is the set of transmission power of the BS i, in which the p max BS i ) is the maximum transmission power limitation of BS i obtained by the min-max power allocation algorithm.
The active and reactive powers of the substation are limited as follows [17]: P_{ss}^{hbox{min} } le P_{h}^{ss} le P_{ss}^{hbox{max} } (12) Q_{ss}^{hbox{min} } le Q_{h}^{ss} le Q_{ss}^{hbox{max} } (13 where (P_{ss}^{hbox{min} }), (P_{ss}^{hbox{max} }) are minimum and maximum active power limitation of substation, respectively.
For each individual user, there is a limitation on the maximum power index that it can reach, given by (15) (15).
However, when there is a limitation on the maximum power of the power amplifier in each antenna, the clipping effect would result in inferior detection performance for the waterfilling type of power allocation in a low-SNR region as shown in Figures 4b and6b.
Both the MPPT control strategy to capture maximum power under the rated tidal current velocity and the power limitation control strategy to limit output power above the rated tidal current velocity were verified.
