Multi-user mixed type spectrum sharing method and multi-user mixed type spectrum sharing system

The invention discloses multi-user mixed type spectrum sharing method and a multi-user mixed type spectrum sharing system. According to the multi-user mixed type spectrum sharing method and the multi-user mixed type spectrum sharing system disclosed by the invention, a cognitive user launches spectrum perception to perceive whether an authorization frequency band is idle or not; if the authorization frequency band is perceived to be idle, the cognitive user plans to adopt the transmitting power under the optimal outage probability in an opportunity type spectrum sharing mode to access the authorization frequency band; if the cognitive user is perceived to occupy the authorization frequency band, namely, the authorization frequency band is not idle, the cognitive user plans to adopt the transmitting power under the optimal outage probability in a coexistence type spectrum sharing mode to access the authorization frequency band. With the adoption of the multi-user mixed type spectrum sharing method and the multi-user mixed type spectrum sharing system, the outage probability of the cognitive user can be optimized in the premise of ensuring the communication quality of a main user, and finally, the spectrum efficiency of the system and the system capacity are improved.