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Improved Energy Detector using Adaptive Thresholds in Cognitive Radio System  

Kim, Jong-Ho (LG전자 MC연구소)
Hwang, Seung-Hoon (동국대학교 전자공학과)
Oh, Min-Seok (LG전자 이동통신기술연구소)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.10A, 2008 , pp. 949-955 More about this Journal
Abstract
In this paper, we propose the improved energy detector using adaptive thresholds in cognitive radio system, in order to compensate the weak points of the existing energy detector in the distorted communication environment. In addition, by investigating the several parameters we analyze its performance. The numerical results show the proposed method may get the performance gain, when the mobile speed is slow (3 km/h) as well as the false alarm probability is low ($P_f=10^{-1}$).
Keywords
Cognitive radio; Primary user; Secondary user; Energy detector; Fixed threshold; Adaptive threshold;
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