Influence of Filter Tuning Accuracy on Quasiharmonic Phase Estimation Quality Under Interference Conditions

In this paper we discuss the influence of filter tuning accuracy on quasi-harmonic phase estimation quality under interference conditions. The operation of radio measuring systems, satellite navigation systems, in which increased accuracy of radio measurements is required, including such a parameter as phase, is an urgent issue. Modern global navigation satellite systems (GNSS), are used not only to determine the location of an object, but also to provide phase/time synchronization of both communication equipment, for example <tex>$4 \mathrm{G}, 5 \mathrm{G}$</tex> base stations, and measuring instruments with the reference frequency generator, for example spectrum analyzers. In this paper, we will look at the accuracy of phase measurements. We obtained the calculated ratios to determine the bias of the phase parameter estimation of quasi-harmonic signal.