A Novel Approach for Spectrum Sensing with Effect of Radiation

Abstract

In Orthogonal Frequency Division Multiplexing (OFDM) large serial data can be converted into parallel data stream. Each parallel block can be transmitted with orthogonal carriers. If the spectrum is not utilized effectively then more number of carriers can be used in wireless applications, but increasing the carriers leads to radiation effect in environment. To reduce the radiation effect, spectrum should be effectively utilized. Effective utilization of electromagnetic spectrum for the unlicensed users to use the licensed spectrum, white spaces i.e. unused frequency bands need to be detected by dynamic spectrum access in Cognitive Radio(CR) .In this paper two spectrum sensing techniques are proposed ,they are energy detection with Wavelet transform and Cyclostationarity sensing.