Method for rectifying GPS framing signal offset of GPS terminal apparatus

A GPS terminal and GPS positioning technology, applied in the field of GPS positioning, can solve the problems of data deviation, positioning direction, inaccurate movement speed, and discount of GPS positioning system advantages.

Inactive Publication Date: 2008-01-09
YINGHUADA (SHANGHAI) ELECTRONIC CO LTD
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  • Abstract
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Problems solved by technology

However, due to the problem of signal propagation, the influence of receivers and other factors will cause some data deviations, which may lead to inaccurate positioning directions, movement speeds, etc., the general error ...

Method used

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  • Method for rectifying GPS framing signal offset of GPS terminal apparatus
  • Method for rectifying GPS framing signal offset of GPS terminal apparatus
  • Method for rectifying GPS framing signal offset of GPS terminal apparatus

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Embodiment Construction

[0037] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0038] Please refer to Fig. 1 and Fig. 2, the method for correcting the GPS positioning signal offset on the GPS terminal device includes the following steps:

[0039] (1) GPS terminal equipment performs system initialization operation;

[0040] (2) The satellite periodically sends GPS positioning data;

[0041] (3) GPS terminal equipment receives corresponding GPS positioning data;

[0042] (4) Perform a three-dimensional calculation operation according to the GPS positioning data to obtain the positioning data information of the current position. The three-dimensional calculation operation is: calculate the positioning data information (x, y, z) of the current position of the GPS terminal device according to the following equations and the system time t of the GPS terminal device:

[0043] ...

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Abstract

The invention relates to a method of correcting GPS positioning signal offset on GPS terminal equipment, comprising the steps of: receiving corresponding GPS positioning data, making 3D calculation to obtain the current position's positioning data information, combining with the front two effective positioning data to make validity judgment on the current positioning data, according to the results, discarding it or using it as effective data to determine whether there is error, according to the judgment results, outputting directly or after correction, and displaying on the GPS terminal equipment. Thus, it improves GPS positioning accuracy; besides, improves the whole performance and reduces the error range from above 10m to less than 3m, expands application range of the GPS positioning system, and brings very great convenience to the people's production and life.

Description

technical field [0001] The invention relates to the technical field of GPS positioning, in particular to the technical field of positioning error correction of GPS terminal equipment, and specifically refers to a method for correcting GPS positioning signal offset on a GPS terminal equipment. Background technique [0002] In modern life, the GPS positioning system has been more and more widely used. In the existing technology, the basic positioning principle of GPS is that the satellite continuously sends its own ephemeris parameters and time information, and the user's GPS terminal equipment receives these After receiving the information, the three-dimensional position, three-dimensional direction, moving speed and time information of the receiver are obtained through calculation. However, due to the problem of signal propagation, the influence of receivers and other factors will cause some data deviations, which may lead to inaccurate positioning directions, movement speed...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S5/14G01S1/02G01S19/35
Inventor 李剑莉何代水
Owner YINGHUADA (SHANGHAI) ELECTRONIC CO LTD
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