METHOD AND APPARATUS OF FREQUENCY OFFSET-FREE FRAME SYNCHRONIZATION FOR HIGH ORDER QAM SIGNALS IN MODEM APPARATUS

摘要

PURPOSE: By using the size of the QAM symbol the frame synchronization method and apparatus thereof can show the excellent frame synchronization performance regardless of the carrier frequency deviation. CONSTITUTION: The sync pattern which uses the size by using the QAM symbol size is composed(710). The received vector in which the size is computed in order to symbol-by-symbol and using the size is composed(714). The frame synchronization obtains based on correlation between the sync pattern using the size and the received vector using the size. In correlation between the sync pattern using the size and the received vector using the size, calculation operates(720). Correlation decides the estimate in which the operation result most highs with the start range of frame and the frame synchronization obtains.