Efficient Spectrum Sensing Using Discrete Wavelet Packet Transform Energy Detection in Cognitive Radio

The detection based on wavelet technique is commonly used in image processing in those applications which involve edge detection. In this approach proposed by Tian and Giannakis, wavelets were made use of for the detection of edges in the Power Spectral Density of wide-band channel for spectrum sensing. The edges in power spectral density serve as the demarcation separating the various spectrum holes or white spaces, hence it helps to detect the vacant bands. On the basis of this information, an attempt has been made by using this wavelet based detection technique for sensing the spectrum in Cognitive Radio system and Comparatative Simulation Performance Analysis of Wavelet based Energy Detection has been described.