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Energy Detection Based Spectrum Sensing Over Two-Wave With Diffuse Power Fading Channels

Chatziantoniou, Eleftherios; Allen, Ben; Velisavljevic, Vladan; Karadimas, Petros; Coon, Justin


Eleftherios Chatziantoniou

Ben Allen

Vladan Velisavljevic

Justin Coon


One of the most important factors that affects the performance of energy detection (ED) is the fading channel between the wireless nodes. This paper investigates the performance of ED-based spectrum sensing, for cognitive radio (CR), over two-wave with diffuse power (TWDP) fading channels. The TWDP fading model characterizes a variety of fading channels, including well-known canonical fading distributions, such as Rayleigh and Rician, as well as worse-than-Rayleigh fading conditions modeled by the two-ray fading model. Novel analytic expressions for the average probability of detection over TWDP fading that account for single-user and cooperative spectrum sensing and square law selection diversity reception are derived. These expressions are used to analyze the behavior of ED-based spectrum sensing over moderate, severe, and extreme fading conditions and to investigate the use of cooperation and diversity as a means of mitigating the fading effects. The obtained results indicate that TWDP fading conditions can significantly degrade sensing performance; however, it is shown that detection performance can be improved when cooperation and diversity are employed. The presented outcomes enable identifying the limits of ED-based spectrum sensing and quantifying the tradeoffs between detection performance and energy efficiency for CR systems deployed within confined environments, such as in-vehicular wireless networks.

Journal Article Type Article
Acceptance Date Apr 7, 2016
Online Publication Date Apr 21, 2016
Publication Date 2016
Deposit Date Jan 12, 2022
Journal IEEE Transactions on Vehicular Technology
Print ISSN 0018-9545
Electronic ISSN 1939-9359
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 66
Issue 1
Pages 868-874
Keywords Cognitive radio (CR), cooperative spectrum sensing, diversity reception, energy detection (ED), noise uncertainty, spectrum sensing, two-wave with diffuse power (TWDP) fading
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