holes in Cognitive Radio (CR). However, few studies make mention of wavelet transform
based signal processing before energy detection. In this paper, a novel cooperative energy
spectrum sensing algorithm with 1-D or 2-D wavelet denoising is proposed. The 1-D wavelet
denoising is performed at each sensing node, while the 2-D wavelet denoising is
implemented at the sensing station. Simulation results show that the spectrum sensing …