Cooperative Spectrum Sensing Algorithm Based Database Decision

Cooperative spectrum sensing can improve sensing capability of the system. But in a system which owns channels of different protection levels, it will bring bad effects to detection performance when using a single sensing algorithm and data fusing rule in different channels of this system. Therefore this paper proposes a cooperative sensing algorithm, which is based on policy database to select different measures for various channels by diverse protection levels. The performance of this algorithm is simulated in the model of Okumura. The result shows that the proposed algorithm of policy database has better detection performance when compared with the method of one single sensing algorithm and fusing rule.