The primary task of Cognitive Radio (CR) technology is to sense the underutilized radio spectrum and to allocate it to the secondary users dynamically without any harmful interferences to primary users of the licensed band either in frequency domain or in time domain. Multitaper Method is one of the most efficient nonparametric spectral assessment techniques which provide an accurate, effectual and computationally viable solution to achieve a comprehensive high spectral-resolution for better spectrum utilization. In this paper the Multitaper Method (MTM) is investigated and the adaptive MTM (AMTM) is analyzed under specific realistic channel fading conditions.
The adaptive multitaper method is compared with conventional periodogram method and the comparison shows distinct 35.3% enhancement in received spectral power which validates better spectral estimation. In this paper we analyzed the performance of adaptive multitaper method under realistic fading channel models including Nakagami-m. We also examine the analytic function of 6MHz bandwidth, in analogy with ATSC-DTV, and estimated the channel state availability through AMTM under Nakagami-m and Rayleigh fading environment. In both cases the AMTM provides betterresults compared periodogram, in terms of average power spectral estimate. A comprehensive Monte-Carlo simulation of the model is also presented in the paper.