METHOD FOR FRAME AND FREQUENCY SYNCHRONIZATION OF AN OFDM SIGNAL AND METHOD FOR TRANSMITTING AN OFDM SIGNAL

摘要

The invention relates to a method for frame and frequency synchronization of an OFDM signal or a signal for transmitting an OFDM signal that is used to impress a pilot phase profile on pilots that are already contained in the OFDM signal for channel estimation. Said pilot phase profile is then used on the reception side for frame and frequency synchronization. The method is advantageous in that no additional transmission capacity has to be used for synchronization. The inventive method is initiated by an upstream, rough time synchronization unit that searches for the begin of the protective interval in the OFDM signal. The comparison between a stored pilot phase profile and the received subcarrier symbols is carried out by cross-correlation, the result of which is evaluated to determine the frame and frequency synchronization.