Abstract
Spectrum sensing is one of the key functionalities in the implementation of cognitive radio. It is used to sense the unused spectrum in an opportunistic manner. In this paper, we propose an energy detector with adaptive double-threshold for spectrum sensing, to optimize the detection performance at a fixed probability of false alarm \((\text{ P }_\mathrm{f})\) i.e. 0.1, which also overcomes sensing failure problem. In the present work, the detection threshold is made adaptive to the fluctuation of the received signal power in each local detector of cognitive radio (CR) user. Simulation results show that proposed scheme optimizes better detection performance and outperforms both conventional energy detector and cooperative spectrum sensing (CSS) method by 12.8 and 3.3 % at \(-\)8 dB signal to noise ratio (SNR), respectively. While utilizing CSS with proposed adaptive double-threshold scheme, where each CR user use a double threshold detectors for local detection and send detection decisions to fusion center (FC) to give the final decision based on hard decision rule. It is further found that CSS with adaptive double-threshold improves detection performance around 26.8 and 7.6 % as compare to CSS with single threshold and Hierarchical with quantization method at \(-\)10 dB SNR, respectively, under the case when a small number of sensing nodes are used in spectrum sensing.
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References
Bagwari, A., & Singh, B. (2012). Comparative performance evaluation of spectrum sensing techniques for cognitive radio networks. In Fourth IEEE international conference on computational intelligence and communication, networks (CICN-2012) (Vol. 1, pp. 98–105).
Zeng, Y., Liang, Y.-C., Hoang, A. T., & Zhang, R. (2010). A review on spectrum sensing for cognitive radio: Challenges and solutions. EURASIP Journal on Advances in Signal Processing, 2010, 1–15.
Song, C., Alemseged, Y. D., Tran, H. N., Villardi, G., Sun, C., Stanislav, F., et al. (2010). Adaptive two thresholds based energy detection for cooperative spectrum sensing. In Proceedings of the 2010 IEEE CCNC (pp. 1–6).
Tandra, R., & Sahai, A. (2008). SNR walls for signal detection. IEEE Journal of Selected Topic in Signal Processing, 2(1), 4–16.
Sun, C. H., Zhang, W., & Ben Letaief, K. (2007). Cooperative spectrum sensing for cognitive radios under bandwidth constraints. In Proceedings of the 2007 IEEE, wireless communications and networking conference (pp. 1–5).
Srivastava, S. K., & Banerjee, A. (2009). ‘n-ratio’ logic based cooperative spectrum sensing using double threshold energy detection. In Proceedings of the 2009 international conference on cognitive radio oriented wireless networks and, communications (pp. 312–317).
Liu, S.-Q., Hu, B.-J., & Wang, X.-Y. (2012). Hierarchical cooperative spectrum sensing based on double thresholds energy detection. IEEE Communications Letters, 16(7), 1096–1099.
Ghasemi, A., & Sousa, E. S. (2005). Collaborative spectrum sensing for opportunistic access in fading environments. In Proceedings of the IEEE international symposium on new frontiers in dynamics spectrum access networks, 8–11 Nov. 2005 (pp. 131–136).
Urkowitz, H. (1967). Energy detection of unknown deterministic signals. Proceedings of the IEEE, 55(4), 523–531.
López-Benítez, M., & Casadevall, F. (2012). Improved energy detection spectrum sensing for cognitive radio. IET Communications, 6(8), 785–796.
Yucek, T., & Arslan, H. (2009). A survey of spectrum sensing algorithms for cognitive radio applications. IEEE Communication Surveys and Tutorials, 11(1), 116–130.
Do, T., & Mark, B. L. (2012). Improving spectrum sensing performance by exploiting multiuser diversity. Foundation of cognitive radio systems (pp. 119–140). Prof. Samuel Cheng (Ed.), ISBN: 978-953-51-0268-7.
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The authors wish to thank their parents and God for supporting and motivating for this work because without their blessings this was not possible.
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Bagwari, A., Tomar, G.S. Cooperative Spectrum Sensing with Adaptive Double-Threshold Based Energy Detector in Cognitive Radio Networks. Wireless Pers Commun 73, 1005–1019 (2013). https://doi.org/10.1007/s11277-013-1244-3
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DOI: https://doi.org/10.1007/s11277-013-1244-3