Date Added: Mar 2012
Rapid growth of wireless applications and services has made it essential to address spectrum scarcity problem. In this context, an emerging technology, Cognitive Radio (CR) has been come out to solve this spectrum scarcity problem. The most important function of cognitive radio is spectrum sensing which requires more accuracy & low complexity. This paper proposes spectrum sensing technique using Wavelet Packet Transform (WPT) based energy detector. Current spectrum management model, command- and control, is creating a fundamental cause to drop the spectral efficiency of the radio spectrums in times and spaces.