WAVELET AND S-TRANSFORM BASED SPECTRUM SENSING IN COGNITIVE RADIO

It is based on using the channel of the licensed user (also called primary user, PU), if the PU is not using it and without harmful interference. The harmful interference is

In the Fourier transform, it is observed that the pressure spectrum related to fixed bed condition is characterized by the presence of lower frequency and amplitudes than those

In overlay spectrum sharing the secondary service measures the spectrum band, if the spectrum is detected as idle, the secondary initiates transmission.Under the assumption

We presented in this paper a new approach that uses Cognitive Radio to improve wireless communication for a cognitive radio mobile terminal by enhancing the

The overhead contains additional sensing time, delay, energy and sensing actions dedicated to cooperative sequential sensing any also contains any performance degradation that

This scheme was proposed as a solution to the problem of noise uncertainty, fading and shadowing. This scheme decreases the probabilities of false detection and false

CR is an persuasive resolution to the spectral congestion crisis by establishing the opportunistic exploitation of unused frequency bands that are not significantly engaged through

By introducing the trust scheme into the fuzzy logic scheme to represent the reliability of the nodes, a cooperative spectrum sensing scheme based on trust and fuzzy logic for