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Cognitive radio (CR) techniques are used widely to improve the utilization of spectrum resources by allocating spectrum holes dynamically. The spectrum sensing is one of the key CR techniques, especially for wideband cognitive radio. It has been the main emphasis of a lot of researches in CR communications. The wavelet transform detection method can divide the wideband spectrum, and then comparing...
Spectrum sensing is one of the key issues for spectrum sharing in cognitive radio networks to deal with the more and more serious problem on exhaustive spectrum resource. In this paper, we study the problem of wideband spectrum sensing in cognitive radio networks with multiple primary networks. By dividing the total wideband spectrum into many groups with relatively small number of narrowbands, a...
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