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发布时间： 2010-06-12
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Cognitive radio is widely expected to be the next Big Bang in wireless communications. Spectrum sensing, that is, detecting thepresence of the primary users in a licensed spectrum, is a fundamental problem for cognitive radio. As a result, spectrum sensinghas reborn as a very active research area in recent years despite its long history. In this paper, spectrum sensing techniques fromtheoptimal likelihood ratio test to energy detection, matched filtering detection, cyclostationary detection, eig


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