Synchronization of ofdm signals with improved windowing

(57) The mechanism (80) in which the phase of the symbol for summary phase correlation is determined is offered. Since the first window value over a symbol sample and the second window value over a time offset symbol sample are generated, a mechanism (80), A symmetrical アポダイジング windowing function is performed to the time offset symbol sample which offset only T/2 from the symbol sample which has the symbol time T, and the symbol sample. A mechanism (80) applies the time shift for carrying out resequencing to the first window value which carries out resequencing of the time offset symbol sample to a symbol sample, therefore 相応s the second window value. Next, a totalled value is changed into a phase. A symmetrical アポダイジング windowing function is a アポダイジング windowing function which has the characteristic of W+W= regularity (FFTSize is a size of an FFT sample). Symmetrical アポダイジング windowing functions, such as a hanning window, may be performed in time of a frequency domain.