| 摘要 |
PROBLEM TO BE SOLVED: To enable the code of a detection object to be identified at high speed. SOLUTION: A second code, a third code or a first code are successively detected and a timing of the first code and code kinds are made to be detected by stopping a data shift clock (DCLK1 ) which is given to a matched filter means 82 in a desired timing, holding a reception signal S10, switching a replica code generated by a correlation coefficient generation means 83 to the first, the second or the third replica code in a desired timing and investigating the correlation value at that time. Thus, it is possible to perform each correlation detection almost in the same timing by having the matched filter mans 82 perform the correlation detection at high speed, while holding the reception signal and to identify the first code included in the reception signal at higher speed compared with the conventional methods. |
