| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly-accurate satellite positioning system having extremely high processing speed even in the case of an ultra-feeble signal buried in noises from the satellite. <P>SOLUTION: In this satellite positioning system, a satellite signal from the satellite A is received by a receiver terminal 11, and thereby the pseudo distance to the satellite A is determined. The receiver terminal 11 is equipped with a frequency conversion part connected to an internal oscillation part 34, for converting a PN signal into a prescribed frequency region, the first operation part for performing FFT of a received PN code acquired from the signal processed by the frequency conversion part, a pattern operation part for generating an internal PN code pattern, the second operation part for performing FFT of the internal PN code pattern, the third operation part for synchronously adding a component acquired by applying the frequency component of a signal acquired by the second operation part to the frequency component of a signal acquired by the first operation part, and detecting the frequency error of a frequency signal by the internal oscillation part, and a pseudo distance detection part 19 for determining the pseudo distance from a signal wherein the frequency error of the frequency signal is canceled. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
