Patent ID: 8527227

Claim:
An electromagnetic wave measurement method for measuring an electromagnetic wave, the method comprising: acquiring a time waveform of the electromagnetic wave; decomposing the time waveform of the electromagnetic wave into wavelet expansion coefficients by wavelet transform; calculating influence levels of the respective wavelet expansion coefficients to a spectrum in a predetermined measurement range; weighting the wavelet expansion coefficients, using a processor, based on at least the influence levels of the respective wavelet expansion coefficients to the spectrum; and converting the weighted wavelet expansion coefficients into time waveforms by inverse wavelet transform, wherein the calculation for the influence levels of the respective wavelet expansion coefficients to the spectrum includes: extracting a single value from the decomposed wavelet expansion coefficients, reconstructing the single value into a time waveform by the inverse wavelet transform, converting the reconstructed time waveform by Fourier transform, calculating a value as one of the influence levels by adding a signal intensity of at least a single frequency; the signal intensity being derived from the Fourier transform, and repeating the calculation for the respective wavelet expansion coefficients.