Cooperative Spectrum Sensing with Coded and Uncoded Decision Fusion under Correlated Shadowed Fading Report Channels

Costa, Lucas dos Santos; Guimarães, Dayan Adionel; De Souza, Rausley Adriano Amaral; Bomfin, Roberto César Dias Vilela

doi:10.3390/s19010051

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Cooperative Spectrum Sensing with Coded and Uncoded Decision Fusion under Correlated Shadowed Fading Report Channels

Lucas dos Santos Costa

^1,*

Dayan Adionel Guimarães

Rausley Adriano Amaral De Souza

¹ and

Roberto César Dias Vilela Bomfin

National Institute of Telecommunications—Inatel Av. João de Camargo 510, Santa Rita do Sapucaí, MG 37540-000, Brazil

Vodafone Chair Mobile Communication Systems, Technische Universität Dresden, D-01062 Dresden, Germany

Author to whom correspondence should be addressed.

Sensors 2019, 19(1), 51; https://doi.org/10.3390/s19010051

Received: 14 November 2018 / Revised: 11 December 2018 / Accepted: 19 December 2018 / Published: 23 December 2018

(This article belongs to the Section Sensor Networks)

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Abstract

This article addresses the impact of forward error correction when applied to the report channel transmissions of a centralized decision fusion cooperative spectrum sensing scheme designed to detect idle orthogonal frequency division multiple access (OFDMA) subchannels. The OFDMA signal is transmitted over slow frequency-selective multipath Rayleigh fading channels and sensed using the maximum eigenvalue detection test statistic. The decisions on the OFDMA subchannel occupancy are transmitted to a fusion center over report channels represented by a shadowed fading model combining a three-dimensional spatially correlated shadowing with a slow and flat multipath Rayleigh fading. Binary Bose-Chaudhuri-Hochquenghem (BCH) and Repetition codes are used to protect these decisions. Results show that shadowing correlation severely deteriorates the overall spectrum sensing performance and that error correction may not be able to protect the report channel transmissions. It can be even worse with respect to the system performance especially at low signal-to-noise regimes. In the situations in which error correction is effective, the Repetition code is capable of outperforming the BCH, meaning that the diversity gain may be more relevant than the coding gain when the spectrum sensing decisions are subjected to correlated shadowing. View Full-Text

Keywords: cognitive radio; correlated shadowing; maximum eigenvalue detection; sensor information fusion; shadowed fading; spectrum sensing

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MDPI and ACS Style

Costa, L.d.S.; Guimarães, D.A.; De Souza, R.A.A.; Bomfin, R.C.D.V. Cooperative Spectrum Sensing with Coded and Uncoded Decision Fusion under Correlated Shadowed Fading Report Channels. Sensors 2019, 19, 51. https://doi.org/10.3390/s19010051

AMA Style

Costa LdS, Guimarães DA, De Souza RAA, Bomfin RCDV. Cooperative Spectrum Sensing with Coded and Uncoded Decision Fusion under Correlated Shadowed Fading Report Channels. Sensors. 2019; 19(1):51. https://doi.org/10.3390/s19010051

Chicago/Turabian Style

Costa, Lucas d.S., Dayan A. Guimarães, Rausley A.A. De Souza, and Roberto C.D.V. Bomfin. 2019. "Cooperative Spectrum Sensing with Coded and Uncoded Decision Fusion under Correlated Shadowed Fading Report Channels" Sensors 19, no. 1: 51. https://doi.org/10.3390/s19010051

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Cooperative Spectrum Sensing with Coded and Uncoded Decision Fusion under Correlated Shadowed Fading Report Channels

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