Phase-Difference Ambiguity Resolution for a Single-Frequency Signal
نویسنده
چکیده
In this letter we propose a novel method to unambiguously estimate the phase-difference of a single-frequency signal measured between a pair of spatially separated sensors. First, we mathematically prove that, in a noiseless system, the phase between a pair of spatially separated sensors with inter-sensor spacing exceeding half wavelength (λ2 ) of the signal of interest, can unambiguously be estimated utilizing a third collinear sensor, provided that the difference of the two smaller inter-sensor spacings does not exceed λ2 . The performance of the method is characterized by estimating the variance and the probability of failure in noisy cases.
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