Next, we formally define the statistical constraints on the outage probability given in (2) in terms of p, q, and the maximum secondary user transmission power over different spectrum bands.
More specifically, we find the values of the probabilities p and q along with the maximum secondary transmission rates and powers that maximize the average rate of a secondary user while providing statistical guarantees for the performance of PRNs.
This design parameter represents the maximum propulsion power of the secondary power source (i.e., electric machine/battery) during pure electric driving.
More interestingly, as we increase the secondary power P2 or the number of antennas, the maximum in Figure4 (i.e. the advantage of overlay in terms of average rate) increases its value and shifts its position towards the primary transmitter.
Similar conclusions can be drawn for Figure5: the maximum tends to move towards the primary transmitter as we increase the secondary power or the number of antennas and the region where overlay is better most of the time becomes larger.
Results from "Gene detective" [25] provided a secondary power assessment.
The maximum transmission power on secondary links is 0.1 W. The minimum transmission rate requirement of the streaming users is set to 128 kbps.
In this article, we consider a spectrum sharing cognitive radio network with a transmit antenna selection scheme, subject to the peak interference constraint of primary user (PU) and the maximum transmit power limit of secondary user (SU).
Substituting with (20) in (19), we get the following constraint on the maximum transmission power of a secondary user over the i th channel P max ( i ) ≤ P mask ( i ) - P ( 1 - γ ) p ( i ) g D min * ( i ) (21).
Figure 6 shows the characteristics of the interference to PU produced by secondary system for different maximum transmit power budget (P_{l}^{text {max} }) (i.e., (P_{l,1}^{text {max} })=(P_{l,2}^{text {max} })=(P_{l}^{text {max} })) with and without sensing errors in PC algorithm.
