Title:
ハイブリッド位置決定システムにおける誤差推定値を決定するための方法および装置
Document Type and Number:
Japanese Patent JP4414136
Kind Code:
B2
Abstract:
A method and apparatus that allows correlations between a selected parameter and the error in a pseudo range measurement to be exploited. A database is established in which the amount of error estimated for particular pseudo range measurements to a beacon is maintained. Clusters are defined. Each cluster is associated with a range of values for the selected parameter. Pseudo range measurements are then associated with a particular cluster based upon the value of the selected parameter at the time (or proximate to the time) the pseudo range masurement was taken. As more estimates of the pseudo range measurements are made, the size of the clusters (i.e., the range of values of the selected parameter) can be reduced. Due to the correlation between the selected parameter and the errors in the pseudo range measurements, reducing the size of the clusters reduces the variance of the error estimates. The mean value of the error estimates is used to correct the error in future pseudo range measurements.
Inventors:
Bayanos, alkynus
Application Number:
JP2002548471A
Publication Date:
February 10, 2010
Filing Date:
October 24, 2001
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
G01C21/00; G01S19/48; G01S1/00; G01S5/02; G01S19/12; G08G1/0969; H04W64/00
Domestic Patent References:
| JP2000509829A | ||||
| JP9166655A | ||||
| JP2000244967A | ||||
| JP7146351A | ||||
| JP675036A | ||||
| JP7294623A |
Foreign References:
| WO1999061934A1 | ||||
| WO1999054752A1 |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama