Optimal Power Allocation for CR Networks with Direct and AF Relay-Aided Transmissions
Journal Title: روش های هوشمند در صنعت برق - Year 2016, Vol 7, Issue 28
Abstract
One of the most prominent challenges in meeting the demand is the scarcity of radio resources. Cognitive radio is one of the techniques has been proposed for efficiently utilizing the radio resources. In Cognitive Radio CR) networks, the CR users have opportunities to access the licensed spectrum bands assigned to the primary users (PUs). Since the PUs have priorities to use the bands, the CR users are not allowed to generate unacceptable interference to them. In this paper, we investigate power allocation schemes for CR networks with two users where one users uses direct transmission and the other uses AF relay-aided transmissions. We first formulate an overall rate optimization problem with interference constraints to the PU and peak power constraints at each node and obtain solutions by theoretical analysis. We also simulate the solution base on different location of the relay and different location of the PU network. we compare the results with equal power allocation.
Authors and Affiliations
Anahita Pakdelian, Rouhollah Aghajani
Keywords
Related Articles
- EP ID EP319752
- DOI -
- Views 120
- Downloads 0
Optimal Control of Micro-grid (MG) to Improve Voltage Profile Including Combined Heat and Power System
Usually, in the studies of optimal control for the micro-grid with combined heat and power (CHP), economic and environmental goals have been raised. In these studies, the optimization of control devices and compensators...
Control of a Linear Distillation Column Using Type-2 Fuzzy Method Optimized by Genetic Algorithm
The distillation process is important process in the chemical industry and has wide application in industry. Distillation tower is used by chemical engineers as a popular tool to separate materials and is the most common...
Stability of nonlinear load electric arc furnaces in the presence of reactive power sources
This paper first discusses about Electric arc.the model used in this paper is a dynamic model shown with a differential equation. Then, this model is placed with power system model which is considered as a thevenin equiv...
A New ZCS high step-up converter with low auxiliary elements
In this paper, a new soft switching high step up converter is introduced which its auxiliary circuit does not have any extra switch. Therefore, it no needs extra driver circuit and control circuit is simple. Also the ene...
Novel Control Strategy for VSI and CSI Active Filters and Comparing These Two Types of Filters
Recently to eliminate the harmonics and improve the power factor of the power networks, much attention has been attracted to active filters. The advantages of these filters are lower volume and their better compensating...