A cooperative spectrum sensing scheme based on Detecting Reliability Statistics in cognitive radio

Cooperative sensing can improve the performance of spectrum sensing in cognitive radio. This paper focuses on the design of hard information fusion strategy in cooperative sensing when detecting nodes work under varying degrees of reliability. A Cooperative Spectrum Sensing Scheme based on Detecting Reliability Statistics (CSS-DRS scheme) is proposed in this paper, in which fusion center estimates the reliability of each detecting nodes by means of probability statistics. The reliability estimation is based on the historical sensing results and does not need extra data transmission in report channel. Simulation results show that CSS-DRS scheme has significant advantage over traditional K-out-of-N strategy when detecting nodes work under varying degrees of reliability.