Achievable Throughput Analysis for Multiple-user Cooperative Spectrum Sensing Scheme with the Best Relay in Cognitive Radio Networks

摘要

The multiple-user cooperative spectrum sousing scheme has been proven as an effective method to reduce the detection time and improve the detection probability significantly over fading channels. In this paper. a theoretical analysis is carried out for the throughput, performance of the traditional non-cooperative scheme and multiple-user cooperative spectrum sensing scheme with the best relay over Raylcigh fading channels. Numerical experimentations are conducted according to those closed-form expressions in order to verify the superiority of the proposed scheme. The results show that the achievable throughput of cognitive user is enhanced 24% by the proposed multiple-user cooperative spectrum sensing scheme compared with the non-cooperative scheme and moreover, the throughput is improved with a rise in the number of candidate relays at the same condition.