A 5g communication modulated signal identification method and system

A modulation signal and recognition method technology, applied in the field of communication, can solve the problems of low recognition accuracy and high complexity, achieve low time complexity, and improve the performance of classification accuracy

Active Publication Date: 2021-06-29
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, due to the problems of low recognition accuracy or high complexity in the existing modulation recognition technology

Method used

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  • A 5g communication modulated signal identification method and system
  • A 5g communication modulated signal identification method and system
  • A 5g communication modulated signal identification method and system

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Embodiment Construction

[0076] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0077] Modulation recognition methods are mainly divided into two categories: those based on decision theory and those based on statistical patterns. Among them, the modulation recognition based on decision theory takes Bayesian theory as the core algorithm. Based on Bayesian theory, the maximum likelihood (ML) classifier, the mean ), generalized...

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Abstract

Embodiments of the present invention provide a method and system for identifying 5G communication modulation signals. The method includes: performing feature extraction on digital signals to obtain high-order cumulant features; performing dimensionality reduction processing on the high-order cumulant features to obtain dimensionality reduction After the high-order cumulant feature; carry out weight distribution to the high-order cumulant feature after the dimension reduction, obtain the weighted feature combination; Based on the KNN algorithm, according to the weighted feature combination, obtain the modulation type recognition result of the digital signal . Compared with the prior art, the embodiment of the present invention improves the classification accuracy performance of the 5G communication modulation signal under low signal-to-noise ratio, and has the advantage of lower time complexity.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and system for identifying 5G communication modulation signals. Background technique [0002] Nowadays, with the rapid development of communication technology, adaptive communication technology has been widely used. This technology can continuously measure signal and system changes, automatically change the system structure and parameters, and enable the system to adapt to environmental changes by itself. The realization of an adaptive communication system (adaptive communication) requires that the system can automatically identify the incoming signal modulation type, so signal modulation identification technology needs to be used. [0003] With the continuous development and transformation of communication modulation technology and the complex and changeable communication environment, especially the fifth generation mobile communication technology (5th ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00
CPCH04L27/0012
Inventor 李立华马倩煜张平
Owner BEIJING UNIV OF POSTS & TELECOMM
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