A high precision carrier tracking scheme based on phase estimation and compensation

Abstract

When phase locked loop (PLL) works in high dynamic environments, the dynamic stress error may be not ignorable, which limits the accuracy of carrier tracking. In this paper, we propose a new carrier tracking scheme to reduce the dynamic stress error of the PLL by concatenating the traditional PLL with a phase estimation and compensation (PEC) module. The PEC module can estimate and compensate the steady state phase error of the PLL's output. We theoretically analyze the phase error performance of this new scheme, namely PLL-PEC. Simulation results show that PLL-PEC reduces the dynamic stress error and increases the carrier tracking accuracy remarkably. Besides, PLL-PEC is very simple and easy to implement.