Joint Cross-Layer Resource Allocation and Interference Avoidance With QoS Support for Cognitive Radio Systems

Provided by: EURASIP Topic: Mobility Date Added: Feb 2012 Format: PDF
In this paper, the authors study the coexistence and optimization of a centralized orthogonal frequency-division multiple access-based Multiuser Cognitive Radio (MCR) system which coexists with a cellular Primary System (PS). Two different spectrum sharing methods, i.e., the spectrum underlay/overlay, are utilized for different co-existent frameworks, in which, the sharing method is adapted to one of them based on the distance between two base stations and the interference limit in the PS. They consider a PS-assistance-based coexistent architecture and propose a joint power control and interference management method to avoid unacceptable interference to Primary Users (PU).

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