Transmission system using multicarrier modulation

Details Transmission system using multicarrier modulation Transmission system using multicarrier modulation

H - Electricity

04

L

H04L 7/08 (2006.01) H04L 5/06 (2006.01) H04L 27/26 (2006.01)

Patent

CA 2347268

A discrete multitone modulation transmission system is described in which frame synchronization is monitored at the receiver by correlating frequency domain complex amplitudes of a synchronizing frame with a stored synchronizing pattern. If the correlation result falls below a threshold, indicating a loss of frame synchronization, a plurality of correlations are performed, in each case using the stored complex amplitudes of the synchronizing frame multiplied by a respective complex value representing a respective complex demtation corresponding to a respective possible time shift of the synchronizing frames. The best correlation result, if it exceeds another threshold, indicates a time shift for restoring frame synchronization, this being possible before the next synchronizing frame is received.

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