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In order to achieve efficient Dynamic Spectrum Access (DSA) in Cognitive Ultra-WideBand (C-UWB) systems, an orthogonal wavelets based dynamic pulse shaping method is proposed to obtain pulses which can adapt to any given spectral requirements. Using Meyer wavelet set as the orthogonal basis, pulses with high power efficiency can be achieved. The compact support property of Meyer wavelets enables them to efficiently reduce the computational complexity in dynamic pulse shaping calculation. Moreover, the authors demonstrate that the proposed method is easy to implement and can achieve a good balance between power efficiency and system complexity.
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