Patent ID: 6754292
Filing Date: 2004-06-22
Classification: H04L,H04N

Abstract:
A receiver circuit, comprising:a sampler, for taking digital samples of a received signal at a sampling rate, said received signal including at least a first portion and a second portion which repeats the content of the first portion after a repeat interval; at least one correlator for measuring: a first correlation between the first portion of the signal, delayed relative to the second portion by a first delay equal to the repeat interval plus a difference interval, and the second portion of the signal; and a second correlation between the first portion of the signal, delayed relative to the second portion by a second delay equal to the repeat interval minus the difference interval, and the second portion of the signal; means for comparing the measured first and second correlations to produce a comparison output; and means for controlling the sampling rate of the receiver on the basis of the comparison output in order to tend to equalize the first and second correlations.