Performance Evaluation of BPSK modulation Based Spectrum Sensing over Wireless Fading Channels in Cognitive Radio

Abstract

Wireless technology is increasing rapidly over the last two decades. It has been limited to growth in wireless radio spectrum, because the radio spectrum is a finite resource which indicates that there is significant scope of improving spectrum utilization. Cognitive Radio (CR) is the key enabling technology that improves the efficiency of spectrum utilization. The spectrum sensing gives the capability of CR to detect there is no primary user present in the band over wireless fading channels. In this paper we study the performance of BPSK modulation scheme under AWGN, Rayleigh, Rician and Nakagami-m fading channels are analyzed using bit error rate (BER). The performance compare between the different types of the fading channels using the MATLAB simulation. The simulation results show that the performance of the system is good in case of AWGN channel as compared to other fading channels and the Rician fading channel is better than the other fading channels such as Nakagami-m and Rayleigh fading channels when the value of K is large.