TY - CHAP A1 - Waqas Ahmed A2 - Mike Faulkner A3 - Jason Gao ED1 - Samuel Cheng Y1 - 2012-03-16 PY - 2012 T1 - Opportunistic Spectrum Access in Cognitive Radio Network N2 - The fast user growth in wireless communications has created significant demands for new wireless services in both the licensed and unlicensed frequency spectra. Since many spectra are not fully utilized most of the time, cognitive radio, as a form of spectrum reuse, can be an effective means to significantly boost communications resources. Since its introduction in late last century, cognitive radio has attracted wide attention from academics to industry. Despite the efforts from the research community, there are still many issues of applying it in practice. This books is an attempt to cover some of the open issues across the area and introduce some insight to many of the problems. It contains thirteen chapters written by experts across the globe covering topics including spectrum sensing fundamental, cooperative sensing, spectrum management, and interaction among users. BT - Foundation of Cognitive Radio Systems SP - Ch. 9 UR - https://doi.org/10.5772/30469 DO - 10.5772/30469 SN - PB - IntechOpen CY - Rijeka Y2 - 2021-12-07 ER -