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Positioning apparatus, and control method of positioning apparatus

A technology for positioning devices and positioning satellites, applied in positioning, synchronous signal speed/phase control, measuring devices, etc., can solve problems such as difficult multi-path, difficult correction of multi-path, difficulty in signal waveform modeling, etc., and achieve the goal of correcting multi-path Effect

Inactive Publication Date: 2007-04-18
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, it is very difficult to model the signal waveform, especially when the signal strength is weak, if the signal waveform is not the same as the model, it is difficult to judge multipath, and it is also very difficult to correct multipath

Method used

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  • Positioning apparatus, and control method of positioning apparatus
  • Positioning apparatus, and control method of positioning apparatus
  • Positioning apparatus, and control method of positioning apparatus

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Embodiment Construction

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0034] In addition, the following examples are preferred specific examples of the present invention, so there are various technical limitations. However, as long as there is no specific limitation of the present invention in the following description, the scope of the present invention is not limited to these examples. example.

[0035] FIG. 1 is a schematic diagram of a terminal 20 and the like according to an embodiment of the present invention.

[0036] The terminal 20 is an example of a positioning device.

[0037] As shown in FIG. 1 , the terminal 20 has a GPS device 32 . The terminal 20 can receive a plurality of positioning satellites, such as radio waves S1 sent by GPS satellites 12 a , 12 b , 12 c , and 12 d , through the GPS device 32 .

[0038] Here, the radio wave S1 and the like may reach the terminal 20 as a direct wave ...

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Abstract

A positioning apparatus for positioning based on satellite signals from positioning satellites includes: correlation information generating means for generating correlation information which indicates correlation values between the satellite signals and correlation purpose signals stored in the positioning apparatus; correlation information evaluating means for determining whether or not variation in the correlation values falls within a predetermined normal variation range; multipath determining means for determining whether or not the satellite signals are affected by a multipath based on determination results of the correlation information evaluating means; multipath correcting information generating means for generating multipath correcting information to correct effects of the multipath based on determination results of the multipath determining means and the correlation information; and correlation value correcting means for correcting the correlation values based on the multipath correcting information.

Description

technical field [0001] The invention relates to a positioning device for positioning based on a signal sent by a positioning satellite and a control method for the positioning device. Background technique [0002] Currently, a positioning system that utilizes a satellite navigation system such as GPS (Global Positioning System: Global Positioning System) to locate the current position of a GPS receiver is widely used in real life. [0003] The GPS receiver receives, for example, signal waves from three or more GPS satellites, and calculates the correlation peak value (CodePhase: code phase) of the C / A (Clear and Acquisition or Coarse and Access) code carried by the signal waves. And, based on the correlation peak value, calculate the difference between the time when each GPS satellite sends out the C / A code and the time when the C / A code arrives at the GPS receiver (hereinafter referred to as the delay time), and then obtain the time difference between each GPS satellite and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/10G01S5/02G01S19/22
CPCG01S19/22G01S19/23
Inventor 乡原直树
Owner SEIKO EPSON CORP
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