Binary Information Press
By taking into account the reporting channel fading and the differences in the reliability of the decisions made by different Secondary Users (SUs), a general performance analysis of cooperative spectrum sensing are given. The analysis results show that the performance of cooperative spectrum sensing is limited by the probability of reporting error and decision fusion rule. To deal with the limitation, an optimal algorithm cooperative spectrum sensing is proposed. Firstly, a transmit diversity with randomized space-time coding is proposed for local sensing decisions.