Patent ID: 8817922

Claim:
A wireless receiving apparatus comprising: a calculation module configured to calculate, for each of modes, correlation values between a received signal and reference signals, the received signal being received at the apparatus, the modes being determined from signal periods of known signals and signal intervals of the known signals, each signal interval indicating the interval between adjacent known signals in a frame of the received signal, each signal period indicating a period required for the same known signal to reappear in the frame, the reference signals corresponding to at least one of sequences having a possibility of being used for the known signals inserted in frames; a detection module configured to synthesize the correlation values to generate first correlation value sequences for each of the modes, and to detect at least one second correlation value sequence, the second correlation value sequence being included in the first correlation value sequences and having a highest correlation value not less than a first threshold; and a determination module configured to select a known signal period from the signal periods and a known signal interval from the signal intervals, based on first correlation values included in the second correlation value sequence, and to determine a received signal mode based on the selected known signal period and the selected known signal interval, the received signal mode being a mode of the received signal.