Method and apparatus for correcting for clock and carrier...

Details Method and apparatus for correcting for clock and carrier... Method and apparatus for correcting for clock and carrier...

H - Electricity

04

B

325/45

H04B 15/00 (2006.01) H04L 27/26 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2040558

A method of correcting for the impairments of phase jitter and frequency offset imposed by a transmission medium and of a clock frequency difference between a transmitting and a receiving multicarrier modem is disclosed. The method comprises two modes: a training mode that uses pilot tones, and a data mode that uses random data modulated onto many carriers. During the training mode the frequencies of the phase jitter are estimated, and the parameters of a correcting signal are initialized; during the data mode the correcting signal is used to compensate for the impairments, and then is updated from an estimate of the phase error.

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