On the statistics of cognitive radio capacity in shadowing and fast fading environments

Muhammad Fainan Hanif, Peter J. Smith, Mansoor Shafi
2009 2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications  
In this paper we consider the capacity of the cognitive radio (CR) channel in a fading environment under a "low interference regime". This capacity depends critically on a power loss parameter, α, which governs how much transmit power the CR dedicates to relaying the primary message. We derive a simple, accurate approximation to α which gives considerable insight into system capacity. We also investigate the effects of system parameters and propagation environment on α and the CR capacity. In
more » ... l cases, the use of the approximation is shown to be extremely accurate. Finally, we derive the probability that the "low interference regime" holds and demonstrate that this is the dominant case, especially in practical CR deployment scenarios.
doi:10.1109/crowncom.2009.5189035 dblp:conf/crowncom/HanifSS09 fatcat:7rzpdfbg7vdx3oj6bv25hsbjf4