Wavelet-based sensing technique in cognitive radio network

[...]this technique is incapable of detecting at low signal-to-noise ratio (SNR) levels. [...]the wavelet-based sensing is proposed to overcome this issue and detect spectrum holes. IoT users encounter connectivity issues when mobile and incur a hefty cost for licensed spectrum. [...]as the number of IoT users increases, the available spectrum frequency shrinks, and the network communication quality becomes degraded. [...]section 4 concludes the outcome presents in this paper. 2. If the threshold value is too low, significant noise will remain, and if the threshold value is too high some crucial aspect of the signal may be filtered out. Because of its simplicity and efficiency, the universal threshold is the most often used method among these.