Sensing-Throughput Tradeoff in Cognitive Radio Network Based on High Activity of Primary User

Based on primary user traffic that the sensing-throughput tradeoff of secondary user has been investigated in cognitive radio network. In this paper, the method of discrete analysis and transition probabilities are used to derive the new formulas of probability and throughput in the higher grade of primary user activity. The probabilities of false alarm and detection are considered. When the active degree of primary user is increased to the channel state of primary user is able to change twice in one frame structure of secondary user, the throughput of secondary user decreases continuously.