Cooperative spectrum sensing method based on H infinity filter theory for cognition of wireless network

Abstract

The invention relates to a cooperative spectrum sensing method based on an H infinity filter theory for cognition of a wireless network. The cooperative spectrum sensing method comprises the following steps of detecting the local spectrum for cognition users, and sending the sensing data and the local sensing results to a data integration center; enabling the data integration center to build a state space model of channel gain according to the sensing data sent by each cognition user, and using an H infinity filter method to evaluate the change condition of channel shade fading gain corresponding to each cognition user; calculating the testing statistic amount by the evaluation value of the channel shade fading gain corresponding to each cognition user; comparing the testing statistic amount with the setting threshold value, and determining which cognition user has a Byzantine type network attack activity; deleting the user data and the local sensing result of the cognition user with the attack activity from the data integration center; enabling the data integration center or using an integration criteria to perform decision integration on the local spectrum sensing result of the cognition user, so as to obtain the cooperative spectrum sensing result. The cooperative spectrum sensing method has the advantage that the cooperated spectrum sensing on the authorized users is well realized.

Description

technical field [0001] The invention relates to a cooperative spectrum sensing method applied in a cognitive wireless network. The method is based on the H infinite filter theory, which can not only realize spectrum detection for authorized users, but also effectively identify and eliminate Byzantine attacks in cognitive users . Background technique [0002] With the extensive research on cognitive radio technology by scholars around the world, cognitive wireless communication network will gradually become the main direction of future communication technology development because of its intelligent and efficient use of spectrum resources. In order to intelligently and efficiently allocate increasingly tight spectrum resources for wireless communication devices and new communication services, cognitive users in cognitive wireless networks must be able to cooperatively perform spectrum sensing on wireless communication systems to find free channels. Therefore, cooperative spec...

AI Technical Summary

Problems solved by technology

[0004] Although existing cooperative spectrum sensing methods can achieve spectrum detection in a certain frequency band, their spectrum sensing performance is vulnerable to Byzantine network attacks in cognitive users

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