A Radiation Source Signal Recognition Method Combining Two Domains and Multiple Features
A signal recognition and radiation source technology, applied in the field of information detection, can solve the problems of low recognition rate and weak generalization ability, and achieve the effect of improving recognition rate, enhancing generalization ability, and comprehensive feature information.
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[0121] The present invention will be further described below in conjunction with the accompanying drawings.
[0122] Step 1: Perform short-time Fourier transform on the radiation source signal sig(t) to obtain a time-frequency domain image, and denote the time-frequency domain image as TF 1 . The short-time Fourier transform formula is:
[0123]
[0124] In the formula, e is the Euler number, ζ(τ) is the window function, (·) * Indicates the conjugate operation, t represents time, f represents frequency, and τ is the integral variable.
[0125] Step 2: Perform an improved Wegener time-frequency distribution transformation on the radiation source signal to obtain a time-frequency domain image, and denote the time-frequency domain image as TF 2 . The improved Wegener time-frequency distribution transformation formula is:
[0126]
[0127] In the formula, (·) * Indicates conjugate operation, t is time, f is frequency, φ is frequency shift variable, is the time shift ...
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