2009/05/20 by Muhammad Fainan Hanif, Peter J. Smith, Hanif, Muhammad Fainan +3
Computer Science · Engineering · Mathematics · #Advanced MIMO Systems Optimization #Cognitive Radio Networks and Spectrum Sensing #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Security Techniques #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.0905.3201
to appear in IEEE CrownCom 2009 Proc
arxiv created 2009/05/20 · openalex publication_date 2009/05/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we consider the capacity of the cognitive radio 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 cognitive radio 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 cognitive radio capacity. In all 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 cognitive radio deployment scenarios.