| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a receiver capable of stably performing synchronization by extracting a delimiter signal for obtaining the synchronization from an OFDM signal on which a disturbance, interference, and the like are superposed. <P>SOLUTION: A receiver comprises: a first system configuration (an absolute value conversion circuit 105, a differential coefficient calculation part 106, a threshold determination circuit 107, a falling detector 108, and a delay corrector 109) for extracting frame delimiters by extracting consecutive points of envelope waveforms of all subcarriers in disturbance resistance and interference resistance communication of an OFDM modulation method; and a second system configuration (a BPF 110, a zero-cross detector 111, a power value processing circuit 112, a threshold detection circuit 113, and a gate circuit 114) for extracting frame delimiters from zero-cross points of a fundamental wave component of a symbol, where conversion point pulses corresponding to the frame delimiters are surely obtained by interpolating the frame delimiters of the first system into the frame delimiters of the second system by an OR circuit 115. <P>COPYRIGHT: (C)2013,JPO&INPIT |
