Frame synchronization method and - a device for use in a an ofdm - method -applying a digital communications system

摘要

The frame synchronization apparatus comprises a phase calculator 100 for calculating phase values of TPS pilots within a symbol according to in-phase I and quadrature-phase Q channel signals received from a transmitting side; D-BPSK decoder 200 for performing D-BPSK demodulation for the phase values of the TPS pilots supplied from the phase calculator and outputting the TPS pilots within the demodulated symbol; control signal generator 300 for comparing the demodulated TPS pilots Sn,p with each other in symbol units and outputting a control signal (representative pilot Sn) according to the compared resu and flame synchronization unit 400 for confirming a synchronization word position by comparing TPS pilot of one symbol of previous frame with TPS pilot of corresponding symbol of current frame, according to the control signal supplied from the control signal generating means and outputting a frame sync signal. Hence, frame synchronization can be achieved by using the synchronization word inverted at each frame in one TPS block without the need to increase the size of hardware.