Frame synchronizer

Details Frame synchronizer Frame synchronizer

H - Electricity

04

L

340/205

H04L 7/00 (2006.01) H04J 3/06 (2006.01)

Patent

CA 1172728

ABSTRACT OF THE DISCLOSURE A frame synchronizer for detecting synchroni- zing patterns inserted at leading positions of data trains, for each data, which data trains are independent for each period, by a mechanical sensor mounted on the earth observing satellite LANDSAT is disclosed. The code synchronizer comprises a PN (pseudo noise) code generator for cyclically generating a PN code, a comparator and a counter. A receiving code train including the PN code as a synchronizing signal is applied to the PN code generator and the number of times of coincidence of the output code of the PN generator and an input code is counted. When the number of times of coin- cidence exceeds a preset number, it is determined that the synchronization has been obtained. A probability of wrong synchronization is minimized and the loss of image on a ground station is prevented.

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