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Method for increasing positioning precision of PDT terminal

A terminal positioning and terminal technology, applied in electrical components, wireless communication, connection management, etc., can solve the problem of low satellite positioning accuracy

Active Publication Date: 2015-07-22
TIANJIN 712 COMM & BROADCASTING CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, aim at the problem of low positioning accuracy of a single satellite, propose a method for improving the positioning accuracy of PDT terminals, and improve the positioning accuracy of PDT terminals by using the CORS system

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  • Method for increasing positioning precision of PDT terminal
  • Method for increasing positioning precision of PDT terminal
  • Method for increasing positioning precision of PDT terminal

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Embodiment Construction

[0017] In order to understand the present invention more clearly, describe the present invention in detail in conjunction with accompanying drawing and embodiment:

[0018] Such as Figure 1 to Figure 3 As shown, the method to improve the positioning accuracy of the PDT terminal is implemented with the PDT system and the CORS system as the hardware platform.

[0019] figure 1 It is a system connection diagram. The PDT system consists of a PDT core network, a PDT base station and various PDT terminals. The PDT base station is connected to the PDT core network by wire, and the PDT terminal is connected to the PDT base station by wireless. The PDT base station needs to be equipped with a satellite positioning module. Or know its own position coordinates; the PDT terminal needs to be equipped with a satellite positioning module, which supports RTD positioning technology, or supports RTK positioning technology; the CORS system is composed of a CORS reference station and a CORS da...

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Abstract

The method relates to a method for increasing the positioning precision of a PDT terminal. The method is divided into a base station assisting RTD broadcast mode and a network RTK mode according to the different functions of the satellite positioning modules of the PDT terminal. The base station assisting RTD broadcast mode is characterized in that the PDT terminal is provided with the satellite positioning module supporting the RTD technology, a PDT core network periodically acquires satellite positioning pseudo-range differential information in the coverage of base stations in a local area from a CORS data center and broadcasts the information to the terminal, and the satellite positioning module of the terminal calculates precise positions. The network RTK mode is characterized in that the PDT terminal is provided with the satellite positioning module supporting the RTK technology, grouping data connection between the PDT terminal and PDT base stations is built to transmit self-satellite observation information to the CORS data center through the PDT core network, and the CORS data center calculates the precise positions and transmits the same to the terminal. The positioning precision of the PDT terminal using the base station assisting RTD broadcast mode can be increased to a sub-meter level, and the positioning precision of the PDT terminal using the network RTK mode can be increased a centimeter level.

Description

technical field [0001] The invention relates to a PDT dedicated digital trunking communication system and a CORS continuous operation satellite positioning service comprehensive system, in particular to a method for improving the positioning accuracy of a PDT terminal. The method utilizes the CORS system to improve the positioning accuracy of the PDT terminal. Background technique [0002] PDT (Professional Digital Trunking) dedicated digital trunking system is a digital trunking communication system standard with independent intellectual property rights in my country. It is a new digital trunking system that incorporates independent innovation factors of Chinese manufacturers according to China's national conditions. [0003] CORS (Continuous Operational Reference System: Continuous Operational Satellite Positioning Service Integrated System) is a satellite positioning ground-assisted augmentation network, which is the most important part of the "spatial data infrastructure"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W76/00H04W84/08
CPCH04W64/00H04W64/003H04W84/08
Inventor 黄建尧董艳荣刘鹿鸣涂亚军武巍王浩冯云龙
Owner TIANJIN 712 COMM & BROADCASTING CO LTD
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