As shown in Fig. \ref{fig:5}, the minimum probability of miss-detection against the probability of false alarm has been plotted, which exhibits that the optimal linear cooperation from \cite{RefD} for the given set of channel gains, and noise variances for 20 samples and 6 users, and, for the the most extreme probability of detection strategy and greatest modified deflection coefficient approach, lead to a great deal less interference to the primary radios than a single CR and selection combining method indicated by SC-based procedures. In this figure, the probability of detection, given by the most extreme MDC technique, closely approximates the exact maximum detection probability esteem over an extensive variety of false alarm probability., Ssince, the maximum MDC scheme can be utilized as a proficient sub-optimal alternative for both moderate and forceful sharp SS.