2006/04/27 by Aleksandar Jovičić, Aleksandar Jovicic, Pramod Viswanath +2
Computer Science · Mathematics · Physics and Astronomy · #Cognitive Radio Networks and Spectrum Sensing #FOS: Computer and information sciences #Information Theory (cs.IT) #Optical and Acousto-Optic Technologies #Speech and Audio Processing #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.cs/0604107
34 pages, Sections 5 and A.2 updated
openalex publication_date 2006/04/27 · arxiv created 2006/05/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cognitive radios have been proposed as a means to implement efficient reuse of the licensed spectrum. The key feature of a cognitive radio is its ability to recognize the primary (licensed) user and adapt its communication strategy to minimize the interference that it generates. We consider a communication scenario in which the primary and the cognitive user wish to communicate to different receivers, subject to mutual interference. Modeling the cognitive radio as a transmitter with side-information about the primary transmission, we characterize the largest rate at which the cognitive radio can reliably communicate under the constraint that (i) no interference is created for the primary user, and (ii) the primary encoder-decoder pair is oblivious to the presence of the cognitive radio.