Analysis of techniques for the reduction of jitter caused by SONET pointer adjustments

摘要

Fixed rate, variable rate, and feed forward pointer spreading as well as stuff threshold modulation (STM) are analyzed as methods for reducing jitter caused by SONET pointer adjustments. Each method of jitter reduction is described, theoretical analysis is developed to predict RMS jitter performance, and simulation results are presented to illustrate RMS and peak-to-peak jitter performance. A new method of implementing feed forward pointer spreading is described in which STM is used to transmit the synchronizer elastic store phase information.