Patent ID: 6999406

Claim:
A reception synchronization apparatus for detecting a synchronization timing position thereby determining an effective symbol period from an OFDM signal, each frame of which includes a series of n (integer equal to or greater than 1) time slots and a frame guard period added to the series of n time slots, each time slot including an effective symbol period and a guard period added to the effective symbol period, the reception synchronization apparatus comprising: a delay circuit for delaying a received OFDM signal by the effective symbol period; a calculation circuit for calculating a correlation between the received OFDM signal and an OFDM signal delayed by the delay circuit; a frame guard removing circuit that receives a signal outputted from the calculation circuit, removes a frame guard period from a frame period of the received signal, and outputs a resultant signal; an interval integrator for cumulatively adding the signal outputted from the frame guard removing circuit, from one time slot period to another; and a detection circuit for detecting a maximum peak from the interval integration signal obtained for the intervals of time slot periods and generating a detection signal indicating a synchronization timing position corresponding to the a position of the detected maximum peak, the detection signal being used to extract the effective symbol period with a precise timing corresponding to the position of the maximum peak.