NDLI: Performance-traffic-trade-off of two novel hard decision and two soft decision fusion periodogram-based algorithms for cooperative spectrum sensing under unreliable reporting channel

Content Provider	IET Digital Library
Author	Costa, Lucas dos Santos Souza, Rausley A. A. de
Abstract	Spectrum sensing is one of the most important tasks of cognitive radios (CRs) to detect idle bands for opportunistic access. In centralised cooperative sensing, CRs sense a target band and share sensing information via reporting channel with a fusion centre to decide whether the sensed band is vacant or not. This information can be raw data in soft decision fusion scheme or local decisions on the channel occupation state in hard decision fusion one. A soft decision typically achieves better detection performances, but the hard one intrinsically offers smaller data traffic. This study proposes two periodogram-based hard decision algorithms and makes a detailed performance-traffic-trade-off with two periodogram-based soft-decision algorithms. All the approaches are based on the circular folding cooperative power spectral density split cancellation algorithm. Performance analyses are made under unavoidable errors in the reporting channel. In the first assumption, the simple memoryless binary symmetric channel is adopted. In the second one, the more realist memory Gilbert–Elliott channel is assumed. Results show that the proposed schemes are sensitive to reporting errors, but performance loss can be supplanted with channel encoding, yet keeping the traffic smaller than in the soft decision without channel encoding.
Starting Page	1683
Ending Page	1695
Page Count	13
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 14, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.0907
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-05-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Centralised Cooperative Sensing Channel Coding Channel Encoding Channel Occupation State Circular Folding Cooperative Power Spectral Density Split Cancellation Algorithm Code Cognitive Radio Cooperative Communication Cooperative Spectrum Sensing CRs Data Traffic Detection Performances Fusion Centre Hard Decision Fusion Idle Band Detection Local Decisions Memory Gilbert–Elliott Channel Opportunistic Access Performance Analysis Periodogram-based Hard Decision Algorithm Periodogram-based Soft-decision Algorithm Radio Link And Equipment Radio Spectrum Management Sensed Band Sensor Fusion Share Sensing Information Signal Detection Simple Memoryless Binary Symmetric Channel Soft Decision Fusion Periodogram-based Algorithm Soft Decision Fusion Scheme Target Band Telecommunication Traffic Unreliable Reporting Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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