PROBLEM TO BE SOLVED: To provide a waveform analysis device, along with a waveform measuring device, a waveform analysis program, and a waveform analysis method, capable of reliably suppressing an analysis error of fourier transform method.;SOLUTION: The waveform analysis method, used to extract phase information of an input waveform superposed with carriers by applying waveform analysis processing by fourier transform method to the input waveform, includes: an analysis procedure for narrowing the band of at least either of a plus primary spectrum and a minus primary spectrum from the fourier spectrum of the input waveform, separating the spectrums, and computing the phase information of the input waveform based of either of the separated spectrums; an estimating procedure for tentatively applying the same waveform analysis as that for the analysis means to the model of the input waveform so as to estimate analysis error occurring in the analysis procedure when the input waveform is subject to waveform analysis; and a correction procedure for correct the phase information computed by the analysis means by using the analysis error estimated in the estimating procedure.;COPYRIGHT: (C)2011,JPO&INPIT
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