Phase Offset Calibration in Multi-Channel Radio-Frequency Transceivers

Phase Offset Calibration in Multi-Channel Radio-Frequency Transceivers

Blog Article

Phase measurements by the quadrature scheme in radio transceivers can be applied to phase-sensitive applications like precision multi-static 3D localization.However, measurements at different channels with individual local oscillators suffer from random phase offsets due to non-repeatable initial phases of phase-locked loops in frequency synthesizers.In this paper, a novel phase calibration method is proposed to junk ear warmer cancel out both the random and systematic time-invariant phase offsets at the superheterodyne receiver frontends.Direct phase offset measurements and on-site calibration are made possible by additional hardware connections, achieving simple implementation and accurate differential phase measurements without relying on bandwidth resources.The proposed calibration method generates repeatable phases for 2334-080 each device reboot with standard deviation less than 2 degrees, which translates to 0.

9 mm ranging accuracy for 1.8 GHz copyright frequency.This method can also be flexibly extended to accommodate a broad range of practical network scenarios with more channels, various network topologies, and a wider bandwidth.