期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2016
卷号：5
期号：5
页码：1339-1342
出版社：Shri Pannalal Research Institute of Technolgy
摘要：Cognitive radio is a modern technique for the effective utilization of electromagnetic spectrum. In CR, ther e are many functions out of which spectrum sensing is one of the important function. Spectrum sensing is the method of detecting unused spectrum without causing interference to the primary users. Out of number of spectrum sensing techniques proposed by authors, energy detection is widely used due to its simplicity, low computational cost and its ease of use. The conventional energy detection technique which was based on concept of fixed threshold was un-optimized due to its dependency on noise uncertainty. The new energy detection technique proposed is dynamic energy detection algorithm in which we use two threshold values instead of single threshold value. The two threshold values are estimated by the average energy received in a specific period of observation from the legal user. By estimating noise uncertainty factor threshold values are evaluated. The thresholds evaluated are needed to enlarge the probability of detection (Pd) and reduce the probability of false alarm (). In this paper, comprehensive review of both conventional energy detection technique and proposed energy detection technique is reviewed. Along with this tradeoff between detection probability and false alarm probability is analyzed.
关键词：Cognitive Radio; Probability of detection; ; Probability of False Alarm; Spectrum Sensing
