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Spectrum sensing is a crucial task for a cognitive radio system. It enables cognitive radio to identify vacant frequency bands and to opportunistically access spectrum. Thus, reliable detection of primary users is important since the cognitive radio (CR) operating as a secondary system is not allowed to cause harmful interference to PUs. In this paper, an effective generalized likelihood ratio test...
Spectrum sensing is a key technique in the cognitive radio. It enables secondary users to detect spectrum holes and monitor primary users' activity. However, many factors make spectrum sensing much difficult, such as very low signal-to-noise ratio, and noise uncertainty, and quite short sensing time, etc. In this paper, a uniform linear array is configured for each secondary user's receiver. The sample...
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