Joint spatial-temporal spectrum sensing in the presence of reporting errors

Starting from Neyman-Pearson criterion, this paper derives an optimal spectrum sensing scheme which exploits spatial diversity among multiple cognitive sensors and temporal diversity among consecutive time slots jointly. In the proposed scheme, the impact of the imperfect reporting channel on the design of the spectrum sensing scheme is effectively integrated. Simulation results show that compared with singular (either spatial or temporal) diversity-based sensing schemes, the proposed scheme brings not only improvement of sensing performance, but also significant reduction of sensing overhead.