Competent usage of a Cognitive Radio is governed by the fundamental utilization aspect of the spectrum the natural resource. Cognitive radios trying to opportunistically share spectrum along with potential primary users that must be detected in order to avoid causing harmful interference with other users. The dynamic usage of spectrum belongs to the spectrum hole or white space estimation and how exactly it can be utilized in more effective way. In this paper we propose an open situation where at low SNR the estimation of channel. A Matched Filter based system is well-thought-out to make the spectrum sensing decision based on the observed SNR from the Cognitive Users. With the available knowledge of the regulated system parameters, the fusion centre can make a global sensing resolution unfailingly without any additional requirements such as Channel State Information (CSI), prior information and prior prospects about the primary user's signal. Numerical results in terms of receiver operating characteristics (ROC) show that the sensing performance of the proposed Matched filter based system outperforms the performance of the adaptive Takagi and Sugeno's fuzzy energy based system model at low SNR.