Patent ID: 6172993
Filing Date: 2001-01-09
Classification: H04L

Abstract:
A frame synchronization method for use in a digital communication system utilizing OFDM method, comprising the steps of:a) calculating phase values of TPS pilots within a symbol according to in-phase and quadrature-phase channel signals received from a transmitting side;b) calculating phase differences from the phase values of the TPS pilots of previous symbol and the respective phase values of the TPS pilots of current symbol calculated in said step a);c) performing D-BPSK demodulation for the phase difference obtained in said step b);d) determining whether all the demodulated TPS pilots in said step c) are identical to each other;e) determining whether current position corresponds to a sync word position, when all the demodulated TPS pilots are determined identical to each other, in said step d);andf) counting symbols, when current position corresponds to the sync word position in said step e), and generating a frame sync signal according to the counted value.