| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly detect both the signals containing repetition waveforms and its reception timing even at AGC transient response, relating to a receiver which detects signals containing repetition waveforms among received signals. <P>SOLUTION: A received signal is converted to complex base band signals in an IQ demodulation part (14), and is supplied to a phase information generating part (15). The phase information generating part (15) generates the signal representing information about phases of base band signals of inputted I, Q. A correlation detection part (16) detects correlation waveforms between the phase information signal and the signal in which the phase information signal is delayed by a period equal to the repetition interval of the same waveform. A judging part 17 compares the correlation waveform signal with a threshold value to judge presence of the signal containing repetition of the same waveform in the received signal as well as detection timing of the received signal. <P>COPYRIGHT: (C)2008,JPO&INPIT |
