Hard Decision Fusion Based Cooperative Spectrum Sensing over Nakagami-m Fading Channels

2012 ◽  
Author(s):  
Yujun Chu ◽  
Shouyin Liu
Keyword(s):  
Fading Channels ◽  
Spectrum Sensing ◽  
Cooperative Spectrum Sensing ◽  
Decision Fusion ◽  
Hard Decision

Detection performance of cooperative spectrum sensing with hard decision fusion in fading channels

2015 ◽  
Vol 103 (2) ◽  
pp. 297-321 ◽  
Author(s):  
S. Nallagonda ◽  
A. Chandra ◽  
S.D. Roy ◽  
S. Kundu ◽  
P. Kukolev ◽  
...  
Keyword(s):  
Fading Channels ◽  
Spectrum Sensing ◽  
Cooperative Spectrum Sensing ◽  
Decision Fusion ◽  
Detection Performance ◽  
Hard Decision

Performance measurement of one-bit hard decision fusion scheme for cooperative spectrum sensing in CR

2017 ◽  
Vol 8 (1) ◽  
pp. 9-16
Author(s):  
M. Al-Rawi
Keyword(s):  
False Alarm ◽  
Spectrum Sensing ◽  
Cooperative Spectrum Sensing ◽  
Additive White Gaussian Noise ◽  
False Alarm Probability ◽  
Energy Detection ◽  
Decision Fusion ◽  
Probability Effect ◽  
Probability Number ◽  
Hard Decision

This paper measures the performance of cooperative spectrum sensing, over Rayleigh-fading channel and additive white Gaussian noise, based on one-bit hard decision scheme for both AND and OR rules. Three measures based on energy detection are considered including effect of false alarm probability, effect of number of users, and effect of number of samples. Simulation results show that the detection probability increases with increasing false alarm probability, number of users, and number of samples for both AND and OR rules. Also, the performance of OR rule is better than the performance of AND rule.

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

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 51 ◽  
Author(s):  
Lucas Costa ◽  
Dayan Guimarães ◽  
Rausley de Souza ◽  
Roberto Bomfin
Keyword(s):  
Error Correction ◽  
Fading Channels ◽  
Spectrum Sensing ◽  
Rayleigh Fading ◽  
Forward Error Correction ◽  
Cooperative Spectrum Sensing ◽  
Decision Fusion ◽  
Correlated Shadowing ◽  
Shadowed Fading ◽  
The Impact

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.

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