Arrangement for the automatic resynchronization of a data...

Details Arrangement for the automatic resynchronization of a data... Arrangement for the automatic resynchronization of a data...

H - Electricity

04

L

325/28, 340/72

H04L 7/00 (2006.01) H04L 27/227 (2006.01) H04L 27/00 (2006.01)

Patent

CA 1116258

ABSTRACT: A resynchronization arrangement for a data receiver having an auto-adaptive equalizer and a demodu- lator which utilizes a local carrier phaselocked on the received carrier by means of a control loop comprising an integrating circuit. Starting from a signal indicating a synchronization loss the arrangement generates three command pulses: a first pulse makes the adjustable co- efficient of the equalizer and the signal in the memory of the integrating circuit equal to zero; a second pulse is used for making a reduced number of coefficients of the equalizer operative immediately after the first pulse and for reducing the time constant of the integrating circuit; a third pulse is used to make the synchronization loss indication signal equal to zero a given period of time after the end of the second pulse. Resynchronization is obtained without the necessity of a return connection to the transmitter.

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