Patent ID: 8432837

Claim:
A frame synchronization timing detecting apparatus for detecting a frame synchronization timing of a signal transmitted by a communication device employing an orthogonal frequency division multiplexing method or an orthogonal frequency division multiple access method, the frame synchronization timing detecting apparatus comprising: a symbol synchronization timing detector configured to detect a symbol synchronization timing including a first symbol synchronization timing and a second symbol synchronization timing using a correlation calculation; an elapsed time measuring unit configured to measure an elapsed time between the first symbol synchronization timing and the second symbol synchronization timing which are included in detected symbol synchronization timings for received signals transmitted according to a time division duplex method, the second symbol synchronization timing being adjacent to the second symbol synchronization timing; a frame synchronization timing candidate detector configured to detect a symbol that is a candidate for a frame synchronization timing based on the elapsed time measured by the elapsed time measuring unit and to select a latter symbol synchronization timing of the first symbol synchronization timing and the second symbol synchronization timing as the candidate if the elapsed time measured is equal to or higher than a threshold adjusted in accordance with a frame length; and a frame synchronization timing detector configured to detect a frame synchronization timing from the candidate.