Title :
Spectrum sensing scheme for overlay cognitive radio networks
Author :
Wen-Long Chin ; Jia-Ming Lee
Author_Institution :
Dept. of Eng. Sci., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
Considering the effects of primary user traffic, timing misalignment and multiple arrival and departure issues in a sensing period should be addressed for spectrum sensing in future overlay cognitive radio (CR) networks, such as femtocell networks. To achieve this goal, division of the whole sensing duration into multiple windows is proposed. For each window, a two-step detection scheme, i.e. coarse and fine detection, is proposed to improve the performance of the conventional energy detector (ED) in the overlay CR scenario.
Keywords :
cognitive radio; maximum likelihood detection; overlay networks; radio spectrum management; telecommunication traffic; ED; coarse detection; energy detector; fine detection; generalised likelihood ratio test principle; multiple arrival issues; multiple departure issues; overlay CR network; overlay cognitive radio network; primary user traffic; spectrum sensing scheme; timing misalignment; two-step detection scheme;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2015.1112
