Computer cable electromagnetic leakage characteristic analysis method
A feature analysis and computer technology, applied in the field of electromagnetic leakage analysis, can solve problems such as difficulty in identifying information hidden in leakage signals, analysis of cable electromagnetic leakage characteristics, and difficulty in distinguishing leakage signal characteristics, etc., to increase generalization ability, high accuracy rate, model efficiency and stability
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Embodiment 1
[0053] see figure 1 , figure 2 , the present embodiment provides a computer cable electromagnetic leakage characteristic analysis method, comprising the following steps:
[0054] Step 1: Identify the source of the leak
[0055] First collect the leaked electromagnetic signal through the signal acquisition device, and then use the fast Fourier transform to preprocess the time domain signal samples, and then design a network consisting of two one-dimensional convolutional layers, two pooling layers and a fully connected Layered convolutional neural network structure, model training is performed on the signal data in the time domain and frequency domain respectively, and then the electromagnetic signal to be measured is input into the trained convolutional neural network structure model, and passed through the neural network Layer-by-layer feature extraction, and then output the prediction scores of each category in the fully connected layer, and finally identify the source of...
Embodiment 2
[0087] VGA cables, computer power cables, HDMI cables, and unshielded twisted-pair cables are used as the leakage sources to be detected. Data collection and testing are carried out under normal indoor working conditions without shielding electromagnetic waves from other electronic devices. The interference and signal acquisition device consists of A.H.Systems BCP-620 calipers and NI PXIe-5162 signal processing equipment. The calipers are used to collect electromagnetic leakage information. The acquisition accuracy of the signal processing equipment is 10bit, mainly used for signal processing and Storage, the devices to be collected include LCD monitors of the model DELL OptiPLex3240, AOCI2490PXC monitors with HDMI interfaces, computer hosts and HP laptops. The electromagnetic leakage information collection methods are as follows: figure 2 shown;
[0088] The electromagnetic leakage samples of four different cables are collected. Without considering the restoration of leakage...
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