naa a22 4500 510798365 CHVBK 20180411083344.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1152-6 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1152-6 Analysis and Optimization of Sensing Reliability for Relay-Based Dual-Stage Collaborative Spectrum Sensing in Cognitive Radio Networks [Elektronische Daten] [Cuimei Cui, Yiming Wang] Aiming at multiuser cognitive radio networks in a harsh electromagnetic environment, cooperative spectrum sensing with single cooperation can hardly achieve to the desired detection performance. In this paper, a relay-based dual-stage collaborative spectrum sensing model (DCSS) that combines the distributed method with the centralized method is proposed. Furthermore, the optimality of the detection performance of DCSS is investigated in an efficient and feasible way. The optimal voting rule value and the optimal energy detection threshold are also derived by minimizing the detection error rate of the entire network. Finally, an efficient fast sensing algorithm for a large-scale cognitive radio network is deduced, which requires the minimal number, and not all, of cognitive radio users for DCSS while satisfying the target detection error rate bound. The simulated results indicate that when compared to the normal single cooperation method, the optimized DCSS method can reduce the number of cognitive radio user by 65% while still meeting the detection error rate requirement of less than 1%. Springer Science+Business Media New York, 2013 Cognitive radio nationallicence Spectrum sensing nationallicence Dual collaboration nationallicence Amplify and forward relaying nationallicence Optimization nationallicence Cui Cuimei School of Electronics and Information Engineering, Soochow University, Suzhou, China aut Wang Yiming School of Electronics and Information Engineering, Soochow University, Suzhou, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2321-2337 0929-6212 72:4<2321 2013 72 11277 https://doi.org/10.1007/s11277-013-1152-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1152-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cui Cuimei School of Electronics and Information Engineering, Soochow University, Suzhou, China aut NATIONALLICENCE 700 1- Wang Yiming School of Electronics and Information Engineering, Soochow University, Suzhou, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2321-2337 0929-6212 72:4<2321 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer