Electromagnetic interference objective complexity evaluation method based on fast S-transformation time-frequency space model
US10859621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2018 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Apr 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electromagnetic interference objective complexity evaluation method based on a fast S-transformation time-frequency space model comprises the following steps: (1) carrying out fast S-transformation on space electromagnetic signals acquired in real time to obtain a fast speed S-transformation two-dimensional time-frequency matrix of the signal; (2) calculating time domain occupancy rate TP, frequency occupancy rate FP, and energy occupancy rate EP of an evaluation object and interference signals in the fast speed S-transformation two-dimensional time-frequency matrix; (3) calculating electromagnetic interference objective complexity C=TP*FP*EP according to the time-frequency space model; and (4) finding a grading standard according to an objective complexity value so as to determine an electromagnetic interference objective complexity type. Compared with the prior art, the electromagnetic interference objective complexity evaluation method based on the fast S-transformation time-frequency space model has the characteristics that a fast S-transformation method is adopted, one-dimensional limitation of Fourier transformation is overcome, three evaluation parameters including the ti…
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