earticle

영어

Synchronization sequences with special correlation properties can be inserted into a bit stream to correlate the timing at the transmitter and the receiver. On the basis of the ideal auto-correlation property of sequences with an odd length, a new method of constructing odd-periodic sequences of even length is proposed. The auto-correlation of a sequence has double maximum values equal in magnitude and opposite in polarity at zero and middle shifts with the lowest out-of-phase values excluding those at the middle shift. Such sequences are particularly useful for frame synchronization, since the special correlation property can be used to double-check the synchronization timing. As a special case, we can also generate these sequences using binary maximal length sequences.