Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1994-12-02
2000-06-27
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
701214, H04B 7185, G01S 502
Patent
active
060812303
ABSTRACT:
A navigation system which can enhance the position determining accuracy of a mobile object without employing any high precision measuring instrument. The navigation system comprises a GPS range measuring device, an angular velocity measuring device, a velocity measuring device and an azimuth measuring device, which measure the motion of the mobile object; a GPS range error estimating device, an angular velocity error estimating device, a velocity error estimating device and an azimuth error estimating device, which estimate errors involved in the respectively corresponding measuring devices; and a position calculating device which calculates the position of the mobile object from the outputs of the error estimating devices. The error estimating devices are implemented by Kalman filters and averaging processes. The factors of the errors of the individual measuring devices are assumed, and the outputs thereof are corrected, so that the position of the mobile object can always be determined at a high accuracy without employing any high precision sensor.
REFERENCES:
patent: 4680715 (1987-07-01), Pawelek
patent: 4725843 (1988-02-01), Suzuki et al.
patent: 4754280 (1988-06-01), Brown et al.
patent: 4841303 (1989-06-01), Anderson
patent: 5109346 (1992-04-01), Wertz
patent: 5235514 (1993-08-01), Matsuzaki
patent: 5281901 (1994-01-01), Yardley et al.
patent: 5331558 (1994-07-01), Hossfield et al.
patent: 5331562 (1994-07-01), McGuffin
patent: 5343209 (1994-08-01), Sennott et al.
patent: 5471219 (1995-11-01), Rodeffer et al.
Lapucha et al., "The Use of INS/GPS in a Highway Survey System", IEEE Plans '90 Position Location and Navigation Symposium Record, Las Vegas, Mar. 20-23, 1990, pp. 413-420.
English Abstract of JP 3-206913(A).
Gunji Yasuhiro
Hoshino Masatoshi
Kuroda Hiroshi
Nagashima Yoshimasa
Oho Shigeru
Blum Theodore M.
Hitachi , Ltd.
Xanavi Informatics Corporation
LandOfFree
Navigation system furnished with means for estimating error of m does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Navigation system furnished with means for estimating error of m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigation system furnished with means for estimating error of m will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1788062