1. Facilitating opportunities for flexible, efficient and reliable spectrum use employing cognitive radio technologies, Notice of proposed rulemaking and order. FCC, ET Docket No. 03-108, December 2003
2. Jondral, F.K.: Software defined radio – basic and evolution to cognitive radio. EURASIP J. Wirel. Commun. Netw. 3, 275–283 (2005)
3. Akyildiz, I., Lee, W., Mohanty, S., Vuran, M.: Next generation/dynamic spectrum access/cognitive radio wireless networks: a survey. Comput. Netw. 50, 2127–2159 (2006)
4. Haykin, S.: Cognitive radio: brain-empowered wireless communications. IEEE J. Sel. Areas Commun. 23(2), 201–220 (2005)
5. Ahmed, E., et al.: Channel assignment algorithms in CRN. IEEE (2016)