An Enhanced Cooperative Spectrum Sensing Scheme Based on Evidence Theory and Reliability Source Evaluation in Cognitive Radio Context

• Published in: IEEE communications letters Vol. 13; no. 7; pp. 492 - 494
• Main Authors: NGUYEN-THANH, Nhan, KOO, Insoo
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adjustment; Applied sciences; Cognitive radio; cooperative spectrum sensing; data fusion; Dempter-Shafer theory of evidence; Detection; Energy measurement; Exact sciences and technology; Frequency estimation; Frequency measurement; Gain; Information theory; Information, signal and communications theory; Networks; Particle measurements; Power measurement; Radio; Radiocommunication specific techniques; Radiocommunications; Reliability theory; Signal to noise ratio; Simulation; source reliability evaluation; Telecommunications; Telecommunications and information theory; Terminals; Testing; Time measurement; Dempter-Shafer theory of evidence; Simulation; Evidence theory; Information processing; cooperative spectrum sensing; Data fusion; Cognitive radio; Radio communication; Software radio; Signal to noise ratio; source reliability evaluation
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2009.090043

This letter proposes an enhanced scheme for cooperative spectrum sensing which utilizes the signal to noise ratios to evaluate the degree of reliability of each local spectrum sensing terminal on a distributed Cognitive Radio network. The terminals' reliability weight is applied to adjust its sensing data more accuratly before making fusion by Dempter-Shafer theory of evidence. Simulation results show that significant improvement of the cooperative spectrum sensing gain is achieved by our scheme.