Time domain correction heterodyne signal positioning method and device based on windowing Fourier transform

The invention discloses a time domain correction heterodyne signal positioning method and device based on windowing Fourier transform, and relates to the technical field of signal processing, and the method comprises the steps: obtaining a local oscillation optical signal and an echo signal optical signal, and obtaining a local oscillation optical phase and an echo signal optical phase according to the local oscillation optical signal and the echo signal optical signal; according to the local oscillation optical phase and the echo signal optical phase, a balance detector is used for filtering a direct current component, and then an optical heterodyne intermediate frequency current signal is obtained; using windowing Fourier transform to identify the maximum value of the spectrum peak value of the optical heterodyne intermediate frequency current signal, and determining the initial position of the optical heterodyne intermediate frequency current signal; obtaining a phase difference according to the characteri