ESTIMATION AND CORRECTION OF SAMPLING TIMING ERROR IN DISCRETE MULTITONE (DMT) RECEIVER BY AN ITERATIVE PROCESS OVER INDIVIDUAL CARRIERS

摘要

A method and apparatus for iteratively estimating sample timing error in discrete multitone modulated signals. In the processing of a DMT symbol, the phase of a selected measured tone is corrected using an iteratively calculated timing error estimate. Slicing yields a normalized phase error for the selected measured tone, which is then used to update the timing error estimate. Processing is iterated over a set of tones to yield the sample timing error. Estimation of phase errors is done by phaser comparison to the closest ideal tone of the used constellation.