Patent ID: 7983311

Claim:
A signal detection device that detects an arrival of a packet signal in a reception signal, based on a plurality of symbols that are signal waveforms having a predetermined pattern and have been added to a head of the packet signal by a transmitter, the signal detection device comprising: a correlation unit operable to sequentially obtain correlation values between the reception signal and a reference signal that is based on the plurality of symbols, and output the correlation values; a section division unit operable to divide the output of the correlation unit into sections that are each a time period having a fixed length; a section position detection unit operable to detect, for each of the sections, a correlation value that satisfies a predetermined condition from among the correlation values in the section, and output position information indicating a relative position of the detected correlation value in the section; and a synchronization judgment unit operable to detect the arrival of the packet signal based on the position information of the sections output by the section position detection unit.