期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2017
卷号：5
期号：9
页码：15218
DOI：10.15680/IJIRCCE.2017.0509065
出版社：S&S Publications
摘要：In recent years, cognitive radio acts as a better technology for future generation networks because of itsefficient capability intelligent system which can be used to sense, learn and optimized. Cognitive radio grantsunlicensed users to adopt to the licensed frequency bands by way of dynamic spectrum access in order to reducespectrum deficiency. This craves intelligent spectrum sensing techniques like co-operative sensing which generates useof information from number of users. The main defiance in any cognitive radio system is to improvise secondary user’sthroughput while limiting objection foisted on licensed users. In wireless communication system, CR is the mostchallenging and promising concept for an efficient usage of the radio spectrum.Spectrum sensing is one of the mostcritical aspects of the cognitive radio as it offers the awareness of the spectrum holes in the networkingenvironment.Deciding the optimal sensing, transmission timing strategies and accurate sensing techniques are oftremendous emphasized in a cognitive radio network. Spectrum sensing is significant enough to make real timedecisions about which it bands to sense, when and for how long to hold the spectrum using the sensed spectruminformation. In this paper, the cognitive radio concepts and the review of different spectrum sensing techniques arediscussed in a broader sense.
关键词：Cognitive Radio (CR); Additive WhiteGaussian Noise (AWGN); Dynamic Spectrum Allocation;(DSA); Primary User (PU); Secondary User (SU).
