Date Added: May 2013
In cognitive radio systems, the secondary user senses a spectrum band formally allocated to the primary user and utilizes free spectrum bands or white spaces for its transmissions. In this paper, the effect of secondary service optimal power allocation on cognitive radio systems has been investigated. They have formulated and solved an optimization problem with the objective of maximizing the secondary service's capacity. They have also investigated the effect of having optimal power allocation against constant power allocation on secondary service capacity and the primary service outage probability degradation.