H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/165, 363/17
H04L 7/00 (2006.01) H04J 3/06 (2006.01)
Patent
CA 1241406
ABSTRACT OF THE DISCLOSURE: A frame alignment word has N predetermined bits distributed in the frame of a digital transmission signal. Each frame is divided into a number of sectors. Each sector has a heading made up of a bit or a bit group from the alignment word such that when placed end to end the headings in the frame form the alignment word. According to a frame alignment recovery method, bit groups are successively taken from the digital signal received at the sector frequency, each taken group having a maximum bit number equal to the bit number in each heading. The taken bit groups are compared with the heading bits corres- ponding in the frame alignment word and N-1 circular per- mutations thereof. The comparisons are halted before reaching the full alignment word once the comparison of bits between the heading bits and taken successive groups reveals some disagreement.
479598
Bojarski Alain
Robic Robic & Associes/associates
LandOfFree
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