Protocols and Architectures for Wireless Sensor Networks
Protocols and Architectures for Wireless Sensor Networks
Energy detection for spectrum sensing in cognitive radio sensor network over fading channels
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
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As the spectral recourses are limited, the spectrum efficiency is more important for the design of wireless sensor network. In this paper, a spectral correlation based detection method for spectrum sensing is proposed to increase the spectrum efficiency in wireless sensor network. The signal of interests is modeled as a cyclostationary random process, therefore, the spectral correlation function could be used, and a squared coherence function is used as the decision criterion. Simulations are made based on the 4-FSK signal. The results verify that the proposed method outperforms the conventional energy detection.