Cyclostationary Feature Detection in Cognitive Radio for Ultra-Wideband Communication Using Cooperative Spectrum Sensing
P. Aparna, M. Jayasheela · International Journal of Future Computer and Communication · 2013
Almost 80 to 90 percent of the radio spectrum is left unutilized at any period of time, while at the same time some other regions of spectrum experience overcrowding.A cognitive radio is a smart radio that can identify the idle frequencies (also termed as spectral holes or white spaces) and allot them for the use of unlicensed secondary users.The basic functionality of a cognitive radio is to sense the spectrum accurately by avoiding any chances for interfering with primary or licensed users.Spectrum sensing can be performed either in cooperative or non-cooperative method.This paper, performs cooperative spectrum sensing, using the amplify and forward based relay technique.The idea is to utilize relay nodes to convey the signal transmitted from primary user to the fusion center and then estimate the presence or absence of primary activities in the spectrum.The cyclostationary feature detection is the spectrum sensing method used here.Bit error rates for the UWB channel models (CM1/CM2/CM3/CM4) are calculated and compared.