Interferometer phase difference measurement circuit and interferometer phase difference measurement method applicable to short-time multi-frequency signals
A technology for measuring circuits and measuring methods, applied in measuring devices, radio wave measuring systems, instruments, etc., can solve problems such as spectrum leakage and phase difference measurement accuracy reduction, and achieve the effect of overcoming DFT spectrum leakage
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[0028] Further describe the technical scheme of the present invention in detail below in conjunction with accompanying drawing:
[0029] Such as figure 1 and figure 2 As shown, the interferometer phase difference measurement circuit suitable for short-term multi-frequency signals includes a direction-finding channel, a reference channel, a cross-correlation module, and a phase difference module. Or a single signal of multiple modulation modes is separated from the mixed signal, the cross-correlation module is used to perform time-domain cross-correlation on the separated single signal, and the described phase difference module is used to obtain the time-domain cross-correlation Find the phase difference of the signal.
[0030] In this embodiment, the direction finding channel and the reference channel both include:
[0031] Multi-frequency short-time real-time signal acquisition unit: used to collect short-time real-time signals with multiple frequencies or multiple modula...
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