Title:
測位方法、擬似距離計算方法および測位システム
Document Type and Number:
Japanese Patent JP3921172
Kind Code:
B2
Abstract:
Some embodiments of the invention provide a location-determination system that includes several transmitters and at least one receiver. Each transmitter transmits a signal that includes a unique periodically-repeating component, and the receiver receives a reference signal. Based on the received reference signal, the location-determination system identifies an estimated location of the receiver as follows. For each transmitter in a set of transmitters, the system computes a phase offset between the received reference signal and a replica of the transmitter's periodically-repeating component. The system also identifies an approximate location of the receiver and an approximate receive time for the received signal. The system then uses the identified approximate location and time, and the computed phase offsets, to compute pseudoranges for the set of transmitters. Finally, the system identifies the estimated location of the receiver by using the computed pseudoranges.
Inventors:
Shoe, Andrew
Fan Roy, Benjamin
Chichikurisu, John
Fan Roy, Benjamin
Chichikurisu, John
Application Number:
JP2002548469A
Publication Date:
May 30, 2007
Filing Date:
December 03, 2001
Export Citation:
Assignee:
Surf Technology Incorporated
International Classes:
G01S1/00; G01S5/00; G01S5/02; G01S5/14; G01S19/06; G01S19/09; G01S19/24; G01S19/25; G01S19/30; G01S19/42; G01S19/46
Domestic Patent References:
| JP9119973A | ||||
| JP5030024A | ||||
| JP7140223A | ||||
| JP11174142A |
Foreign References:
| US5365450 | ||||
| WO2000049695A1 | ||||
| WO2000010031A1 | ||||
| WO1999019743A1 | ||||
| WO2000058748A1 | ||||
| WO2000010028A1 |
Attorney, Agent or Firm:
Kaiyu International Patent Office
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