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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Luo, Ziwei Wang, Jun Pan, Changyong Zhu, Jinghui Li, Xunchun |
| Copyright Year | 2015 |
| Description | Author affiliation: Academy of Broadcasting Science, Beijing 100866, China (Zhu, Jinghui; Li, Xunchun) || National Engineering Lab. for DTV (Beijing), Tsinghua University, Beijing 100084, China (Pan, Changyong) || Department of Electronic Engineering, Tsinghua University, Beijing 100084, China (Luo, Ziwei; Wang, Jun) Digital Television (DTV) spectrum located in VHF and UHF bands has excellent transmission and indoor penetration characteristics, and sensing the existence of signals of DTMB, i.e. the digital terrestrial multimedia broadcasting standard of China, becomes a key problem of the utilization of DTV spectrum resources in Cognitive Radio (CR) systems. A kind of weighted cooperative spectrum sensing method for DTMB based CR systems is proposed. The method adopts decision and fusion rule based on double-threshold credibility. All the secondary users (SUs) sense the signal from the primary user (PU) using different-interval PN auto-correlation to obtain local decision statistics, and the credibilities are estimated. Only reliable individual decisions beyond double thresholds have positive and larger credibilities and unreliable decisions between double thresholds are set zero credibilities. All local decisions and credibilities are combined to make a global decision. Besides, thresholds of credibility will be adjusted adaptively, balancing the detection performance and efficiency. The analyses of the simulation results prove that the novel method has a significant improvement in different situations compared to typical cooperative sensing methods. |
| Starting Page | 1 |
| Ending Page | 6 |
| File Size | 115816 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781479958658 |
| DOI | 10.1109/BMSB.2015.7177278 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-06-17 |
| Publisher Place | Belgium |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | DTV and broadband multimedia systems DTMB Multimedia communication Cooperative spectrum sensing Diversity reception Making better use of the spectrum double-threshold Broadcasting credibility Sensors Reliability Signal to noise ratio Digital TV |
| Content Type | Text |
| Resource Type | Article |
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