| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a positioning system for preventing a satellite from being captured again only by reflection waves, when capturing the satellite again from a state, where the reception of satellite signals transmitted from the satellite being tracked is interrupted. <P>SOLUTION: The positioning system 1 for positioning based on a satellite signal that is subjected to spectrum diffusion in C/A codes by the satellite and is transmitted comprises a C/A code generator 12 for generating the C/A codes; an integrator 14 for calculating the correlation value between the satellite signal that is subjected to spectrum diffusion and the C/A code generated by the C/A code generator 12; and a timing control section 13 for detecting the phase of the C/A code obtained by performing the spectrum diffusion of the satellite signal. The timing control section 13 predicts the phase of the C/A code when the correlation value becomes less than a threshold, and performs control so that the integrator 14 limits integration within fixed time from timing when a bit for composing the C/A code generated by the C/A code generator 12 is changed to a next bit. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
