This study is concerned with cooperative spectrum sensing (CSS) mechanisms in three-hop cognitive wireless relay networks (CWRNs). The data transmission from a source to a destination is realised with the aid of two layers of cognitive radio (CR) users which are in the transmission coverage of two primary users. The authors first propose a new CSS scheme for a layer of CR users to improve the spectrum-sensing performance by exploiting both local decisions at the CR users and global decisions at the fusion centre. Particularly, the probabilities of missed detection and false alarm for a practical scenario where all sensing, reporting and backward channels suffer from Rayleigh fading are derived.
- wireless systems
- cooperative spectrum sensing
Vien, Q. T., Stewart, B., Tianfield, H., & Nguyen, H. (2013). Efficient cooperative spectrum sensing for three-hop cognitive wireless relay networks. IET Communications, 7(2), 119-127. https://doi.org/10.1049/iet-com.2012.0249