Known signal detection method

A known signal detection method detecting a position of a known signal in a reception signal by a known signal detection apparatus and comprising:

• performing Fourier transform on the reception signal to obtain a second calculation value;
• performing Fourier transform on the known signal to obtain a second calculation value;
• multiplying the first calculation value by a complex conjugate of the second calculation value to obtain a third calculation value;
• performing inverse Fourier transform on the third calculation value to obtain a fourth calculation value;
• detecting a maximum value of an amplitude of the fourth calculation value and a sample point at which the maximum value is obtained;
• detecting the position of the known signal in the reception from the sample point at which the maximum value is obtained;
• generating a vector in which the maximum value is associated with an amplitude and the sample point is associated with a phase;
• and
• averaging the vector over a plurality of frames wherein the reception signal is made up of the plurality of frames in which the known signal is inserted at the same position,
• wherein the position of the known signal in the reception signal is detected from a sample point corresponding to a phase at which an amplitude of the averaged vector becomes a maximum.