| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for detecting receiving time, in which a predetermined angular position of a received signal can be made a detection point, even when the amplitudes of signals are different. <P>SOLUTION: A method for detecting receiving time includes the steps of: sampling a received signal at a sampling frequency equivalent to an integral multiple that is four or more times one cycle; comparing sampling values of two sampling positions in neighboring angular positions; detecting a rising portion of a signal waveform; comparing the absolute values of a difference between the two sampling values of the rising portion; and detecting a zero cross position of the rising portion for a section having the largest amplitude. <P>COPYRIGHT: (C)2012,JPO&INPIT |
