Wavelet-Based Spectrum Sensing for Cognitive Radios using Hilbert Transform

For cognitive radio networks, there is a major spectrum sensing problem, i.e. dynamic spectrum management. It is an important issue to sense and identify the spectrum holes in cognitive radio networks. The first-order derivative scheme is usually used to detect the edge of the spectrum. In this paper, a novel spectrum sensing technique for cognitive radio is presented. The proposed algorithm offers efficient edge detection. Then, simulation results show the performance of the first-order derivative scheme and the proposed scheme and depict that the proposed scheme obtains better performance than does the first-order derivative scheme.

Authors:

• Shiann-Shiun Jeng
• Jia-Ming Chen
• Hong-Zong Lin
• Chen-Wan Tsung

Keywords:

• cognitive radio
• Spectrum Sensing
• wavelet
• edgedetection

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