Pseudo distance and Doppler combination differential positioning system and pseudo distance and Doppler combination differential positioning method
A differential positioning and pseudo-range technology, applied in the field of global navigation satellite systems, can solve the problems of long time, several minutes or even tens of minutes, and high data transmission volume, so as to improve differential positioning ability, eliminate navigation satellite clock difference and navigation Satellite clock clock drift, the effect of improving positioning accuracy
Inactive Publication Date: 2015-01-28
GUANGDONG UNIV OF TECH
View PDF2 Cites 12 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the high-precision real-time dynamic system has two main disadvantages: 1. Since the calculation of the integer ambiguity requires the measurement and transmission of the carrier phase, the carrier phase is a rapidly changing quantity at each moment, and the system data transmission volume is higher than that of the differential system based on the code phase. much higher
2. It takes a long time to determine the integer ambiguity, usually it takes several minutes or even tens of minutes for static users
Therefore, it is more difficult for real-time dynamical systems to determine integer ambiguities at high dynamics
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0050] Such as figure 2 As shown, a pseudo-range and Doppler combined differential positioning system includes: user station receiver 4, reference station receiver 3, also includes GBAS server 5, mobile network 6, said GBAS server 5 and user station receiver 4. The reference station receivers 3 are all connected through the mobile network 6;
[0051] Such as image 3 As shown, in the specific implementation process, the reference station receiver 3 includes a receiving unit, a pseudorange calculation unit, a Doppler calculation unit, a database and a sending unit, and the receiving unit receives the GNSS signal of the navigation satellite 1, and the output of the receiving unit is respectively related to The input connection of the positioning unit, the pseudo-range calculation unit, and the Doppler calculation unit, the output of the positioning unit, the pseudo-range calculation unit, and the Doppler calculation unit are connected to the input of the database, and the data...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a pseudo distance and Doppler combination differential positioning system and a pseudo distance and Doppler combination differential positioning method. The system comprises a user station receiver and a reference station receiver, and further comprises a GBAS server and a mobile network, wherein the GBAS server is connected with the user station receiver and the reference station receiver through the mobile network. The system of the invention can effectively improve the positioning accuracy of users in a complex urban environment and improve the differential positioning ability of a cheap single-frequency navigation chip. The method of the invention is applicable to high-precision satellite positioning, and improves the precision of the location, speed, clock error and clock drift of a user station.
Description
technical field [0001] The present invention relates to the field of global navigation satellite systems, and more specifically, to a pseudorange and Doppler combined differential positioning system and method. Background technique [0002] The Global Navigation Satellite System (GNSS) includes GPS, GLONASS, Beidou and Galileo systems, which provide great convenience for human navigation and positioning. figure 1 Represents a typical global navigation satellite system, GNSS signal receiver 2 captures and tracks the pseudo-random code and navigation data sent by navigation satellite 1, measures the radio wave transmission time from navigation satellite 1 to GNSS signal receiver 2, and then uses the navigation data Calculate the satellite's position and velocity, then calculate the user's position, velocity and time. Cheap receivers are usually based on single-frequency multi-mode chips. The accuracy of the single-frequency receiver for autonomous positioning is affected by ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42
CPCG01S19/426
Inventor 王峰陈樱婷朱海波钱瑞琦邹俊成刘浩成刘立程刘怡俊
Owner GUANGDONG UNIV OF TECH