Open AccessSpectrum sensing scheme for overlay cognitive radio networks
Author(s) -
Chin WenLong,
Lee JiaMing
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.1112
Subject(s) - cognitive radio , overlay , computer science , scheme (mathematics) , computer network , detector , femtocell , window (computing) , energy (signal processing) , real time computing , electronic engineering , telecommunications , engineering , wireless , base station , mathematical analysis , statistics , mathematics , programming language , operating system
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.