Title:
GLOBAL POSITIONING METHOD AND GLOBAL POSITIONING SYSTEM
Document Type and Number:
Japanese Patent JP3806425
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a global positioning method capable of detecting a received position with ultrahigh sensitivity and proper response, even if the satellite received signal is attenuated.
SOLUTION: The method of global positioning for obtaining a pseudo-distance from the receiver terminal to the satellite from the satellite received signal for prescribed time. From the satellite received signal for prescribed time, a prescribed number of a first input signal delayed for minute time equivalent to one bit of navigation data in acquisition start time. A second input signal is obtained by synchronous addition of each first input signal. The pseudo-pattern prepared by the receiver terminal, operated on the second input signal, is further operated on the second input signal. The obtained signal is subjected to the synchronous addition over the satellite received signal for the prescribed time, and the correlation calculation between the obtained synchronous addition signal and the replica PN code previously prepared by the receiver terminal is performed. From this results, delayed value is detected and the pseudo-distance is obtained.
Inventors:
Nobuhiro Kishimoto
Seiichiro Hirata
Seiichiro Hirata
Application Number:
JP2003402075A
Publication Date:
August 09, 2006
Filing Date:
December 01, 2003
Export Citation:
Assignee:
Magellan Systems Japan, Ltd.
International Classes:
G01S1/00; G01S19/24; G01S19/37; H04B1/707; H04B1/709; H04W4/24; (IPC1-7): G01S5/14; H04B1/707
Domestic Patent References:
| JP2004340855A | ||||
| JP2005055375A | ||||
| JP2005148005A | ||||
| JP2000193735A | ||||
| JP2001349935A |
Foreign References:
| WO2003017503A1 |
Other References:
Katsuyuki Tanaka,"A High Performance GPS Solution for Mobile Use",ION GPS 2002,2002年 9月,pages 1648-1655
Mark L. Psiaki,"Block Acquisition of Weak GPS Signals in a Software Receiver",ION GPS 2001,2001年 9月,oages 2838-2850
David M. Lin,"An Efficient Weak Signal Acquisition Algorithm for a Software GPS Receiver",ION GPS 2001,2001年 9月,pages 115-136
Mark L. Psiaki,"Block Acquisition of Weak GPS Signals in a Software Receiver",ION GPS 2001,2001年 9月,oages 2838-2850
David M. Lin,"An Efficient Weak Signal Acquisition Algorithm for a Software GPS Receiver",ION GPS 2001,2001年 9月,pages 115-136
Attorney, Agent or Firm:
Takeshi Nakatani