Cooperative spectrum sensing using opportunistic amplify-and-forward relaying over Nakagami-m fading channels

2013 ◽  
Vol 7 (13) ◽  
pp. 1377-1382 ◽  
Author(s):  
Defeng Ren ◽  
Jianhua Ge ◽  
Yancheng Ji ◽  
Jing Li
Keyword(s):  
Fading Channels ◽  
Spectrum Sensing ◽  
Cooperative Spectrum Sensing ◽  
Amplify And Forward ◽  
Amplify And Forward Relaying

Energy Detection Based Spectrum Sensing Analysis of Cooperative Cognitive Radios under Different Fading Environments

2013 ◽  
pp. 50-73
Author(s):  
Deepti Kakkar ◽  
Mayank Gupta ◽  
Arun Khosla ◽  
Moin Uddin
Keyword(s):  
Cognitive Radio ◽  
Fading Channels ◽  
Spectrum Sensing ◽  
Cognitive Radio Networks ◽  
Cooperative Spectrum Sensing ◽  
Fusion Rule ◽  
Energy Detection ◽  
Radio Networks ◽  
Amplify And Forward ◽  
Comparative Performance

This chapter discusses the detection performance of relay based cognitive radio networks. Relays are assigned in cognitive radio networks to transmit the primary user’s signal to cognitive coordinators or CPUs, thus achieving cooperative spectrum sensing. The purpose of the chapter is to provide mathematical analysis of energy detectors for dual hop networks. The soft fusion rule is used at the relays which acts as amplify and forward relays. For the detection purpose, the energy detector is employed at the cognitive coordinator. In the ending sections, sensing performance is analyzed for different fading channels in the MATLAB environment and simulation results present comparative performance of various relay conditions with concluding remarks.

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