文章基本信息

标题：SPECTRUM SENSING SCHEMES FOR STATIC PRIMARY USER SIGNAL UNDER AWGN AND RAYLEIGH FADING CHANNELS
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作者：WASAN KADHIM SAAD ; MAHAMOD ISMAIL ; ROSDIADEE NORDIN 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2015
卷号：79
期号：2
出版社：Journal of Theoretical and Applied
摘要：This paper taught the performance of the proposed sensing models, namely, constant false alarm rate-dynamic waveform detector (CFAR-DWD) are categorized as dynamic threshold (DT), two-stage (TS), and adaptive two-stage (ATS) detection for accurately detecting of the static-primary user (PU) signals, where the state of the PU signal not change during the sensing duration. Whereby it is carried out by deriving a closed-form expressions for the average detection probability for the proposed models over AWGN and Rayleigh fading channels under low signal-to-noise ratio (SNR) environments. In addition, complete mathematical analysis for the normalized throughput and average channel capacity of the secondary network are developed over AWGN and Rayleigh fading channels to demonstrate the impact of the opportunistic spectrum access. Comparison based on simulation was performed of the detection performance and the normalized throughput among the proposed CFAR-DWD, CFAR-DED and conventional schemes. The simulation results demonstrate that the proposed CFAR-DWD can achieve a precise detection performance significantly outperformed that of the CFAR-DED and conventional schemes. Furthermore, there is a significant impact on the detection performance of the CFAR-DWD and CFAR-DED models by Rayleigh fading, and the impact of Rayleigh fading gets clearer when reduces to (0.01) and reaches up to (0.9), which will lead to poor spectrum usage.
关键词：Dynamic waveform detection (DWD); Dynamic energy detection (DED); Constant false alarm rate (CFAR); AWGN channel; Rayleigh fading channel; Hard decision combining (HDC) rules.