POSITIONING METHOD AND TERMINAL

• US 20180052238A1
• Filed: 05/10/2016
• Published: 02/22/2018
• Est. Priority Date: 05/13/2015
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: YAMAZAKI, Yasuhisa
• Granted Patent: US 10,459,088 B2
• Time in Patent Office: Days
• CPC Class Codes: G01S 19/43 using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry
• CPC Class Codes: G01S 19/44 Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
• CPC Class Codes: G01S 19/50 whereby the position solution is constrained to lie upon a particular curve or surface, e.g. for locomotives on railway tracks

Abstract

In a positioning method and a terminal according to the present disclosure, a processor positions a location of the terminal through interferometric positioning using a plurality of positioning signals received from a plurality of satellites. The processor calculates an integer bias for the plurality of positioning signals, selects a group of location candidates based on a float solution acquired through the calculation of the integer bias, and notifies that the terminal is located at a predetermined point on a map under a condition in which the group of location candidates is included in a line-shaped area.

Claims

1. A positioning method of causing a processor to position a location of a terminal through interferometric positioning using a plurality of positioning signals received from a plurality of satellites, the method comprising:

causing the processor to calculate an integer bias for the plurality of positioning signals;

causing the processor to select a location candidate group which is acquired through the calculation of the integer bias, based on a float solution; and

causing the processor to notify that the terminal is located at a predetermined point on a map under a condition in which the location candidate group is included in a line-shaped area.

2. The positioning method of claim 1, further comprising:

causing the processor to calculate an estimated coordinate of the location of the terminal; and

causing the processor to define the line-shaped area based on the calculated estimated coordinate.

3. The positioning method of claim 1, further comprising:

causing the processor to calculate a movement direction of the terminal; and

causing the processor to define the line-shaped area based on the calculated movement direction.

4. The positioning method of claim 1, further comprising:

causing the processor to define the line-shaped area by using information acquired from a geographic database.

5. A terminal that includes a processor, and positions a location of the terminal through interferometric positioning using a plurality of positioning signals received from a plurality of satellites,

wherein the processor

calculates an integer bias for the plurality of positioning signals,

selects a second location candidate group based on a likelihood that the location of the terminal is a true location, from a first location candidate group for the location of the terminal, which is calculated through the calculation of the integer bias, and

notifies that the terminal is located at a predetermined point on a map under a condition in which the second location candidate group is included in a line-shaped area.

6. The terminal of claim 5,

wherein the processor

calculates an estimated coordinate of the location of the terminal, and

defines the line-shaped area based on the calculated estimated coordinate.

7. The terminal of claim 5,

wherein the processor

calculates a movement direction of the terminal, and

defines the line-shaped area based on the calculated movement direction.

8. The terminal of claim 5,

wherein the processor defines the line-shaped area by using information acquired from a geographic database.