Patent ID: 8781038

Claim:
A wireless receiving apparatus comprising: a calculation module configured to calculate one or more first correlation values between a received signal and one or more reference signals, the reference signals corresponding to one or more first sequences which have a possibility of being used for known signals inserted in a frame of the receiving signal; a first determination module configured to determine a reference position of a first known signal in the frame based on a second correlation value that is not less than a first threshold value, the first known signal being one of the known signals, the second correlation value being included in a first correlation value sequence, the first correlation value sequence being generated by combining the first correlation values according to a mode based on data rate of the receiving signal; and a second determination module configured to determine the length of interleaver blocks by determining whether or not the maximum value of second correlation value sequence is not less than a second threshold value within a first period, the interleaver blocks being a unit for an interleaver process performed for the frame, the second correlation value sequence being generated by combining third correlation values, the third correlation values being between the receiving signal and each of reference signals which correspond to a plurality of second sequences used for a second known signal located at the trailing end of the interleaver blocks and being extracted at the timing of possibly being a second known signal according to the reference position, and to determine an initial position of the interleaver blocks based on the position of the maximum value.