Weitere Artikel dieser Ausgabe durch Wischen aufrufen
The performance of cooperative spectrum sensing (CSS) with double threshold and censoring of cognitive radios (CRs) has been evaluated using maximal ratio combining (MRC) in the presence of Rayleigh faded sensing (S) and reporting (R) channels. Each CR senses the primary user through sensing channel and evaluates the energy of the received signal at its sensing channel input and performs double threshold based spectrum sensing. The qualified CRs are censored and only the selected CRs report their decisions to fusion centre. Censoring of CRs is done on the basis of the quality of R-channel. Typically two types of censoring such as rank-based and threshold-based censoring are considered to select the best CR based on the quality of the R-channels. The censoring of CRs not only improves the detection performance but also reduces the transmission overhead. The performance of CSS has been investigated in terms of average missed detection probability, total error probability, average number of transmitted bits and agility gain of the network with respect to relevant network parameters such as number of selected CRs, censoring thresholds, fail sensing probabilities and S and R-channel signal to noise ratios under both the perfect and imperfect channel estimation. The performance has been studied for hard decision fusion rule (majority) and soft decision fusion rule (MRC). The impact of channel variation rate on the sensing performance is also indicated. Further the performance of double threshold based CSS with censoring is compared with that of single threshold based CSS with censoring.
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
Digham, F. F., Alouini, M.-S., & Simon, M. K. (2003). On the energy detection of unknown signals over fading channels. In Proceedings of IEEE international conference on communicatons, pp. 3575–3579, May 2003.
Ghasemi, A., & Sousa, E. S. (2005). Collaborative spectrum sensing for opportunistic access in fading environments. In Proceedings of 1st IEEE symposium new frontiers in dynamic spectrum access networks, Baltimore, USA, Nov 8–11, 2005, pp. 131–136.
Zhu, J., Xu, Z., Wang, F., Huang, B., & Zhang, B. (2008). Double threshold energy detection of cooperative spectrum sensing in cognitive radio. In Proceedings of the cognitive radio oriented wireless networks & communications (CrownCom), pp. 1–5, May, 2008.
Bhowmick, A., Roy, S. D., & Kundu, S. (2012). Performance of spectrum sensing scheme using double threshold energy detection in the presence of sensor noise. International Journal of Energy Information and Communications (IJEIC), 3(2), 75–84.
Sun, C., Zhang, W., & Letaief, K. B. (2007). Cooperative spectrum sensing for cognitive radios under bandwidth constraints. In Proceedings of wireless communications and networking conference, Hong Kong, pp. 1–5, March 2007.
Guo, C., Wang, W.,& Peng, T. (2008). Agility improvements by censor based cooperative spectrum sensing in cognitive radio networks. In Third international conference on communications and networking in China, ChinaCom 2008, Aug. 2008, pp. 132–136, IEEE, 2008.
Bhowmick, A., Nallagonda, S., Roy, S. D., & Kundu, S. (2014). Spectrum sensing with censoring of double threshold based cognitive radio in Rayleigh fading. In Proceedings of IEEE NCC, IIT Kanpur, Feb, 2014.
Nallagonda, S., Roy, S. D., & Kundu, S. (2013). Performance evaluation of cooperative spectrum sensing scheme with censoring of cognitive radios in Rayleigh fading channel. Wireless Personal Communications (WPC), Springer, 70(4), 1409–1424. CrossRef
Nallagonda, S., Roy, S. D., Kundu, S., Ferrari, G., & Raheli, R. (2013). Cooperative spectrum sensing with censoring of cognitive radios in Rayleigh fading under majority logic fusion. In Proceedings of IEEE nineteenth national conference on communications ( NCC), IIT Delhi, India, pp. 1–5, February 2013.
Shankar, P. M. (2011). Fading and shadowing in wireless systems. Berlin: Springer.
- Cooperative Spectrum Sensing with Double Threshold and Censoring in Rayleigh Faded Cognitive Radio Network
Sanjay Dhar Roy
- Springer US