| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a PPM signal demodulation unit, capable of demodulating a PPM signal subjected to pulse position modulation (PPM) by ultra-wideband (UWB) wireless communication. <P>SOLUTION: The PPM signal demodulation unit is composed so as to include a rectification circuit 14 for rectifying the received PPM signal and converting it into an absolute value signal; integration comparators 20, 22, and 24, which integrate the absolute value signal for each of first, second, and third integration time and respectively execute the integration comparison to an integration value for each integration time; absolute value converters 42, 44, and 46 for executing the absolute value conversion into the output of the integration comparators 20, 22, and 24 respectively; moving average calculators 54, 56, and 58 for making the output of the absolute value converters 42, 44, and 46 to be subjected to the moving average respectively; a determination unit 70 for generating demodulation data, on the basis of the results of the integration comparison in the integration comparison part 22; and a control unit 40 which generates integration section control signals 32, 34, and 36 for controlling the first, second, and third integration time, on the basis of the output of the moving average calculators 54, 56, and 58 and supplies them to the integration comparators 20, 22, and 24, respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
