Cooperative sensing under imperfect feedback channels in dynamic spectrum access networks

Omar Altrad, Sami Muhaidat, Nayef Alsindi, James Aweya

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, cooperative spectrum sensing under perfect and imperfect feedback channels is investigated. In particular, the optimal number of cognitive radios (CRs) required to minimize the total error of the sensing process when a perfect/imperfect reporting channels is derived. We show that the total error is always greater than zero regardless of the number of cooperating nodes. Furthermore, we derive a general formula that represents the boundaries of false alarm probability, and demonstrate that tightening the value of this boundary alone will not result in an improvement of system performance. Additionally, we show that errors in the reporting feedback channels can easily be mitigated when the optimal number of CRs participating in the sensing process is used; therefore, the overall detection probability is improved. Interestingly, results show that errors in the feedback channels can improve the detection probability at a low signal to noise ratio (SNR) link between the primary users (PUs) and the CRs.

Original languageBritish English
Title of host publication2015 IEEE Wireless Communications and Networking Conference, WCNC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1101-1106
Number of pages6
ISBN (Electronic)9781479984060
DOIs
StatePublished - 17 Jun 2015
Event2015 IEEE Wireless Communications and Networking Conference, WCNC 2015 - New Orleans, United States
Duration: 9 Mar 201512 Mar 2015

Publication series

Name2015 IEEE Wireless Communications and Networking Conference, WCNC 2015

Conference

Conference2015 IEEE Wireless Communications and Networking Conference, WCNC 2015
Country/TerritoryUnited States
CityNew Orleans
Period9/03/1512/03/15

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