Distributed Spectral Access and Energy Efficient Cognitive Radio System

Abstract

Cognitive Radio (CR) systems are the upcoming technology in the wireless communication where we have to utilize our spectrum available in the best and the efficient way. The tasks to be covered in the CR technology are broadly classified into two categories .They are efficient utilization of the available spectrum and secondly energy efficiency in the wireless transmission. As said above that in the wireless communication system we have major two challenges are to utilize the spectrum efficiently by also keeping in mind that the least power gets wasted during this process. In this work, we have presented different algorithms like that of Shared Carrier Assignment (SCA) Iterative water-filling algorithm (SCA-IWF) algorithm for efficient utilization of spectrum by sensing it keeping in concern the interference from the other secondary users. Secondly we have provided the energy efficiency of the MIMO system by using Iterative Power Allocation Scheme (IPAS) that converges as the number of iterations increased. Finally we have plotted the result of both the capacity and energy efficiency with respect to number of iterations in both the graph and bar-graph form.