| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform a range finding with high resolution and high precision in a short time at a low cost, using a carrier wave code-modulated into a PN code. SOLUTION: The carrier wave code-modulated by the first PN code having a prescribed frequency is transmitted to a range-finding target, and the carrier wave reflected by the target is received. A distance is computed using a phase difference between a burstlike correlation signal generated based on a correlation value between the second PN code having the code same to the first PN code and a frequency different very small therefrom and the first PN code, and the second burstlike correlation signal generated based on a correlation value between the code of the received carrier wave and the second PN code, and a phase difference between fellow signals after the burstlike signals are integrated.</p> |
