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We know that there is an issue for spectrum resources being unavailable because of increasing wireless services. To solve this a newer intelligent technology have been developed called as Cognitive Radio (CR). This technology inculcates the use of spectrum holes that occur due to the underutilization of the licensed spectrum. The identification of the spectrum holes can be done by using a method known as spectrum sensing. There are a variety of issues faced by individual CRs in precise spectrum sensing such as hidden terminal problem, shadowing and multipath fading. In order to facilitate the eradication of these issues a newer design of cooperative spectrum sensing have been developed called as Cooperative Spectrum Sensing (CSS). In this a particular weight have been designated to each CR participating in the process to classify according to reliability. Instead of using the conventional threshold …