Cooperative spectrum sensing algorithm based on bistable stochastic resonance

According to the spectrum sensing problem under the short of collaborative users and low SNR, a cooperative sensing algorithm based on bistable stochastic resonance (BSR) is presented in this paper. First, decomposition and recombination (DAR) are adopted to increase the dimensions of matrix. Depending on the kind of decompositions, it can be divided into order-DAR and interval-DAR, which have a different influence on the correlation of signals. Then BSR is applied to spectrum sensing in order to enhance the detection performance since it can improve the SNR. Simulation shows that the performance of the proposed method is superior to that of existing cooperative sensing algorithm for the same probability of false alarm under low SNR.