A Method for Improving the Settling Time of Phase-locked loop during Acquisition for Communication Systems

摘要

This paper describes a novel method for proportional- integral-derivative controlled phase-locked loop model for communication system for better settling time during acquisition. A proportional-integral-derivative controlled block is inserted in place of a 4" order loop filter of the phase-locked loop. The s-domain transfer function of the system is derived for linear analysis. The settling, phase margin, bandwidth and stability of the system are analyzed through behavioral simulation by using MATLAB platform. It is observed that the proportional-integral-derivative controlled phase-locked loop model reduces the settling time (~ nS) in comparison to phase-locked loop with 4" order loop filter in the loop (~uS).