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Double-antenna positioning and direction finding method

A dual-antenna and antenna technology is applied in directions such as direction finders using radio waves, satellite radio beacon positioning systems, and radio wave measurement systems.

Pending Publication Date: 2021-07-16
成都金诺信高科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the distance and direction of another slave station relative to the reference station are measured from one reference station to guide the reference station to grasp the position of the station in real time, but there is no perfect method under the Beidou or GPS system

Method used

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  • Double-antenna positioning and direction finding method

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Embodiment 1

[0039] A dual-antenna positioning and direction-finding method, such as figure 1 , based on the master station, the slave station and the satellite, the master station is provided with a master antenna and a slave antenna, the master antenna and the slave antenna of the master station are connected to the first receiver, and the slave station is connected to the second receiver, comprising the following steps:

[0040] Step S1: According to the relative direction of the master antenna and the slave antenna, establish a three-dimensional local coordinate system in space, take the position of the center point of the line segment connecting the master antenna and the slave antenna as the origin, and take the unit vector pointing to the master antenna or the slave antenna as normal vector;

[0041] Step S2: obtain the coordinates of the main antenna, the slave antenna and the slave station in the WGS84 coordinate system by solving the ephemeris data of the satellite;

[0042] Ste...

Embodiment 2

[0057] This scheme is on the basis of embodiment 1, as figure 1 , the range of the azimuth angle A is 0-360°, and the range of the elevation angle α is -90°-90°. In the step S1, the main antenna and the slave antenna are rotated several times along the center point of the line segment connecting the master antenna and the slave antenna, and the coordinates of the master antenna and the slave antenna are measured after each rotation, and then the master antenna and the slave antenna are calculated after each rotation. From the coordinates of the center point of the line segment connected by the antennas, the average value of the center point coordinates calculated each time is taken as the coordinates of the center point of the line segment connected by the main antenna and the slave antenna. Each rotation rotates on the same horizontal plane.

[0058] Working principle: In this embodiment, the main antenna and the slave antenna are rotated several times on the horizontal plan...

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Abstract

A double-antenna positioning and direction finding method comprises the following steps: based on a main antenna and a slave antenna of a slave station and a master station, determining an original point by a central point of the main antenna and the slave antenna to make a local coordinate system, then converting coordinates of the main antenna, the slave antenna and the slave station measured by a satellite under a WGS84 coordinate system to a geocentric rectangular coordinate system, and then converting the geocentric rectangular coordinate system to the local coordinate system; and then calculating the direction and distance of the slave station relative to the original point under the local coordinate system. The scheme provides a relatively perfect method for measuring the direction and distance of the slave station relative to the master station. The obtained distance and direction of the slave station relative to the master station are both based on satellite observation data, and the accuracy is higher.

Description

technical field [0001] The invention relates to the field of positioning and direction finding, in particular to a dual-antenna positioning and direction finding method. Background technique [0002] The early GPS / Beidou satellite positioning system generally used the pseudo-range single-point positioning algorithm. The signal transmitted by the GPS satellite is composed of three parts: carrier, ranging code and navigation message. There are two carriers used by GPS satellites, namely L1 (1575.42MHz) and L2 (1227.6MHz) in the L frequency band. Among them, the L1 carrier is formed by multiplying the reference frequency f0=10.23MHZ generated by the atomic clock on the satellite by 154 times, and its wavelength is 19.03cm. The L2 carrier is formed by multiplying the reference frequency by 120 times, and its wavelength is 24.42 cm. The ranging code is modulated on the carrier. It is a binary code used to measure the distance from the satellite to the receiver. It is a pseudo-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/16G01S19/25
CPCG01S3/16G01S19/258
Inventor 郝伟谢梅林曾迎春田广元龚鹏刘波廉学正李翔宇朱敏陈才刚王洪康张中正
Owner 成都金诺信高科技有限公司
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