Patent ID: 7020791
Filing Date: 2006-03-28
Classification: G06F,H03L,H04J,H04N

Abstract:
1. A method for synchronizing a clock of a receiver with a clock of a transmitter, wherein the transmitter is adapted to transmit a sequence of time references to the receiver, each time reference being representative of a time of transmission of the time reference, the method comprising the steps of: for each time reference of a subset of the sequence of time references: determining a clock error based in part on a difference between the time reference and a time of the receiver clock representative of a time of a reception of the time reference at the receiver; determining a first-order smoothing value based in part on a weighted average of the clock error and a previous first-order smoothing value associated with a previous time reference of the sequence previously received at the receiver; determining a second-order smoothing value based in part on a weighted average of the first-order smoothing value and a second-order smoothing value associated with the previous time reference; and determining a frequency offset based in part on a difference between the first-order smoothing value and the second-order smoothing value.