Method for perceiving the number of master users in cognitive radio network

Abstract

The invention provides a method for perceiving the number of master users in a cognitive radio network. According to the method, the number of the master users can be perceived, and moreover, the change of the number of the master users can be tracked online. The method comprises following steps of S1, perceiving the signals of the master users by multiple secondary users; S2, randomly dividing the multiple secondary users into two groups; S3, joining up the signals of the master users perceived by the two groups of secondary users for typical association analysis, thus obtaining typical association coefficients of the signals perceived by the two groups of secondary users; S4, establishing detection statistical magnitude according to the typical association coefficients; and carrying out multi-assumption sequential detection by the established detection statistical magnitude, thus obtaining the number of the master users. The method is applicable to the technical field of wireless communication.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for a cognitive radio network to sense the number of primary users. Background technique [0002] With the rapid development of global wireless communication technology, new radio systems with different functions have come out one after another. In addition, the current wireless communication system adopts a static (fixed) spectrum allocation strategy, and spectrum resources are becoming more and more scarce. Cognitive radio can sense changes in the external environment, improve spectrum utilization and system capacity, and solve the problem of spectrum shortage. In a cognitive radio system, the secondary user can use the idle spectrum of the primary user without affecting the primary user. In order to avoid impact on the primary user, the secondary user needs to be aware of the spectrum usage status of the primary user in a timely manner. The t...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for sensing the number of primary users in a cognitive radio network, so as to solve the problem existing in the prior art that an array antenna needs to be specially set up in the network to detect the number of primary users, the cost of equipment is large, and the detection long time problem

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