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Sensors and Materials, Volume 33, Number 12(3) (2021)
Copyright(C) MYU K.K.
pp. 4229-4243
S&M2758 Research Paper of Special Issue
Published in advance: November 18, 2021
Published: December 23, 2021

Automatic Modulation Recognition Method Based on Hybrid Model of Convolutional Neural Networks and Gated Recurrent Units [PDF]

Xinyu Hao, Yu Luo, Qiubo Ye, Qi He, Guangsong Yang, and Chin-Cheng Chen

(Received June 9, 2021; Accepted September 16, 2021)

Keywords: convolutional neural networks, global average pooling, gate recurrent units, automatic modulation recognition

With the application of various wireless communication technologies, the electromagnetic environment has become more complex, and the recognition of signal modulation has become increasingly difficult. In this paper, a hybrid model based on deep learning, which aims to quickly classify received modulated signals and help to plan spectrum resources, is proposed. The model is designed by considering the characteristics of convolutional neural networks (CNNs), global average pooling (GAP), gate recurrent units (GRUs), and other structures. Firstly, signal spatial features are extracted by convolution using a CNN, the dimension of the high-dimensional feature map is reduced by GAP, then the signal temporal correlation is extracted using GRUs. Finally, modulation modes are classified in the softmax layer to classify and recognize the modulation modes of the received signal. Experimental results show that the average recognition rate of the model was 60.64% and the maximum recognition rate was 90%. The proposed method not only improves the recognition performance but also enhances the interpretability of the network.

Corresponding author: Guangsong Yang, Chin-Cheng Chen

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Cite this article
Xinyu Hao, Yu Luo, Qiubo Ye, Qi He, Guangsong Yang, and Chin-Cheng Chen, Automatic Modulation Recognition Method Based on Hybrid Model of Convolutional Neural Networks and Gated Recurrent Units, Sens. Mater., Vol. 33, No. 12, 2021, p. 4229-4243.

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