A method for real-time detection of the number of multi-master users in a cognitive radio network

Abstract

The invention provides a method for detecting the number of multi-primary users in real time in a cognitive radio network, which can detect the number of primary users in real time. The method includes: performing feature extraction on primary user signals received by multiple secondary users to obtain two types of feature vectors; forming new feature vectors from the obtained two types of feature vectors as training input data for support vector machines, and the new feature The number of primary user signals corresponding to the vector is used as the training output data of the support vector machine, the type of the support vector machine and the type of kernel function are set, and the optimal penalty factor and the optimal width of the kernel function are obtained through the genetic algorithm; the obtained The optimal penalty factor and the optimal kernel function width are used as the model parameters of the support vector machine to generate a training model; the primary user signals received by multiple secondary users in real time are input into the generated training model, and the real-time detection and Estimate the number of primary users. The invention relates to the technical field of wireless communication.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for real-time detection of the number of multi-master users in a cognitive radio network. Background technique [0002] In recent years, 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 ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for real-time detection of the number of multi-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, and the detection The problem of limited number of primary user signals

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