scholarly journals Recognizing Automatic Link Establishment Behaviors of a Short-Wave Radio Station by an Improved Unidimensional DenseNet

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 96055-96064 ◽  
Author(s):  
Zilong Wu ◽  
Hong Chen ◽  
Yingke Lei ◽  
Hao Xiong
Keyword(s):  
Short Wave ◽  
Radio Station ◽  
Wave Radio

scholarly journals Recognizing Non-Collaborative Radio Station Communication Behaviors Using an Ameliorated LeNet

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4320
Author(s):  
Zilong Wu ◽  
Hong Chen ◽  
Yingke Lei
Keyword(s):  
Recognition Accuracy ◽  
Signal To Noise Ratio ◽  
Short Wave ◽  
Radio Station ◽  
Communication Behavior ◽  
Communication Behaviors ◽  
Training Time ◽  
Wave Radio ◽  
Bispectral Estimation ◽  
Model Algorithm

This work improves a LeNet model algorithm based on a signal’s bispectral features to recognize the communication behaviors of a non-collaborative short-wave radio station. At first, the mapping relationships between the burst waveforms and the communication behaviors of a radio station are analyzed. Then, bispectral features of simulated behavior signals are obtained as the input of the network. With regard to the recognition neural network, the structure of LeNet and the size of the convolutional kernel in LeNet are optimized. Finally, the five types of communication behavior are recognized by using the improved bispectral estimation matrix of signals and the ameliorated LeNet. The experimental results show that when the signal-to-noise ratio (SNR) values are 8, 10, or 15 dB, the recognition accuracy values of the improved algorithm reach 81.5%, 94.5%, and 99.3%, respectively. Compared with other algorithms, the training time cost and recognition accuracy of the proposed algorithm are lower and higher, respectively; thus, the proposed algorithm is of great practical value.

scholarly journals Simple simulation training system for short-wave radio station

2018 ◽  
Author(s):  
Xianglin Tan ◽  
Zhichao Shao ◽  
Jianhua Tu ◽  
Fuqi Qu
Keyword(s):  
Simulation Training ◽  
Short Wave ◽  
Training System ◽  
Radio Station ◽  
Wave Radio ◽  
Simple Simulation

scholarly journals Unidimensional ACGAN Applied to Link Establishment Behaviors Recognition of a Short-Wave Radio Station

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4270 ◽  
Author(s):  
Zilong Wu ◽  
Hong Chen ◽  
Yingke Lei
Keyword(s):  
Short Wave ◽  
Recognition Algorithm ◽  
Radio Station ◽  
Training Set ◽  
Generative Adversarial Network ◽  
Radio Stations ◽  
Real Samples ◽  
Adversarial Network ◽  
Wave Radio ◽  
Training Samples

It is difficult to obtain many labeled Link Establishment (LE) behavior signals sent by non-cooperative short-wave radio stations. We propose a novel unidimensional Auxiliary Classifier Generative Adversarial Network (ACGAN) to get more signals and then use unidimensional DenseNet to recognize LE behaviors. Firstly, a few real samples were randomly selected from many real signals as the training set of unidimensional ACGAN. Then, the new training set was formed by combining real samples with fake samples generated by the trained ACGAN. In addition, the unidimensional convolutional auto-coder was proposed to describe the reliability of these generated samples. Finally, different LE behaviors could be recognized without the communication protocol standard by using the new training set to train unidimensional DenseNet. Experimental results revealed that unidimensional ACGAN effectively augmented the training set, thus improving the performance of recognition algorithm. When the number of original training samples was 400, 700, 1000, or 1300, the recognition accuracy of unidimensional ACGAN+DenseNet was 1.92, 6.16, 4.63, and 3.06% higher, respectively, than that of unidimensional DenseNet.

Atmospheric Effects on Short-Wave Radio Propagation

Nature ◽  
1949 ◽  
Vol 163 (4155) ◽  
pp. 958-959
Author(s):  
J. S. MCPETRIE ◽  
B. J. STARKEY
Keyword(s):  
Short Wave ◽  
Radio Propagation ◽  
Atmospheric Effects ◽  
Wave Radio

scholarly journals Analysis on the Influence of Transmission Lines span on Passive Interference in Shortwave

2018 ◽  
Vol 64 ◽  
pp. 05004
Author(s):  
Ying Lu ◽  
Zhibin Zhao ◽  
Jian gong Zhang ◽  
Zheyuan Gan
Keyword(s):  
Electromagnetic Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
Electromagnetic Scattering ◽  
Electromagnetic Waves ◽  
Short Wave ◽  
Critical Distance ◽  
Observation Point ◽  
Radio Station ◽  
Passive Interference

The passive interference of transmission lines to nearby radio stations may affect the effective reception and transmission of radio station signals. Therefore, the accurate calculation of the electromagnetic scattering of transmission lines under the condition of external electromagnetic waves is the basis for determining the reasonable avoidance spacing of the two. For passive stations operating in short-wave frequencies, passive interference is mainly generated by the tower, and span is one of the most significant factors affecting passive interference. This paper uses the method of moments to carry out the passive interference calculations under normal circumstances, expounds the method of calculating the electromagnetic field of transmission line at the same time. And elaborates the method for calculating the electromagnetic field of the transmission line, obtains the space electric field intensity of the transmission line at the same working frequency and space location of the plane wave. Applying the approximate formula to calculate the formula for the span and critical distance between the observation point and the transmission line.

scholarly journals Analysis on the Influence of the Height of Tower on Passive Interference in shortwave

2018 ◽  
Vol 64 ◽  
pp. 05005
Author(s):  
Ying Lu ◽  
Zhibin Zhao ◽  
Jian gong Zhang ◽  
Zheyuan Gan
Keyword(s):  
Transmission Line ◽  
Method Of Moments ◽  
Transmission Lines ◽  
Electromagnetic Scattering ◽  
Electromagnetic Waves ◽  
Short Wave ◽  
Radio Station ◽  
Radio Stations ◽  
Working Frequency ◽  
Passive Interference

The passive interference of transmission lines to nearby radio stations may affect the effective reception and transmission of radio station signals. Therefore, the accurate calculation of the electromagnetic scattering of transmission lines under the condition of external electromagnetic waves is the basis for determining the reasonable avoidance spacing of the two. For passive stations operating in short-wave frequencies, passive interference is mainly generated by the tower. This paper uses the method of moments to perform passive interference calculations under normal circumstances, And elaborates the method for calculating the electromagnetic field of the transmission line, obtains the space electric field intensity of the transmission line at the same working frequency and space location of the plane wave. Uses the approximate formula to inductive the formula for calculating height of tower and the protective distance.

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