SYSTEM AND METHOD FOR FRAME SYNCHRONIZATION

PROBLEM TO BE SOLVED: To provide a technology for improved frame synchronization. SOLUTION: A method (90) for identifying receipt of a sync word includes: receiving a signal value representing an incoming bit in the stream of signal data (92); inserting the signal value into a first shift register having the same length as the sync word (94); calculating a bit value from the signal value (96); storing the bit value in a second shift register having the same length as the sync word (98); counting the number of matches between the bit values in the second shift register and the corresponding bits in the sync word (100); computing a correlation of the signal data and the sync word by summing the product of each signal value in the first shift register and the corresponding bit in the sync word (102); producing a normalized correlation by dividing the correlation by the energy (106); and outputting a signal indicating the presence of a sync word if the number of matches is at least equal to a predetermined hard correlation threshold and if the normalized correlation is at least equal to a predetermined soft correlation threshold (108). COPYRIGHT: (C)2011,JPO&INPIT