Cognitive radio is a method where secondary user searches for a free band to utilize when licensed frequency band is not utilized. Spectrum sensing is the fundamental necessity of a cognitive radio that empowers to look for the free band and utilize accordingly. The expanded interest for portable correspondences and new remote applications raises the need to proficiently utilize the accessible range assets. This paper manages Cyclostationary based spectrum detecting in Cognitive Radios to empower unlicensed secondary users to craftily get to an authorized band. The alternative FRESH (Frequency Shift) filtering technique using knowledge of the signal cyclostationarity is used to detect the desired signal from the spectrum overlapping. Directions for improvements of these filters are given in this paper. The outcomes demonstrate that for signals which spectrally overlap, the versatile FRESH filter can perform exceptionally well while normal filters come up short.