Binary Information Press
Cognitive radio is considered as one of effective techniques to solve the problem of spectrum scarcity, which seriously limits the future wireless communication systems. In cognitive radio network, spectrum sensing is critical to protect the wireless data transmission of primary users (licensed users). However, the sensing time reduces the throughput of the secondary users (unlicensed users). In this paper, the authors investigate the tradeoff between spectrum sensing and throughput of secondary users based on a priori knowledge of primary users' activity.