Reference time difference determination method and system

A determination method and time difference technology, applied in the field of satellite positioning, can solve the problems of occupying satellite resources, satellite normal communication interference, etc.

Active Publication Date: 2020-03-13
慧众行知科技(北京)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention provides a method and system for determining the reference time difference, which is used to solve the problem in the prior art that the reference signal of the reference station interferes with the normal communication of the satellite and occupies satellite resources

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  • Reference time difference determination method and system
  • Reference time difference determination method and system
  • Reference time difference determination method and system

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Embodiment Construction

[0045] The technical solutions of the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0046] Such as image 3 Shown is a flowchart of a method for determining a reference time difference in an embodiment of the present invention, and the method includes:

[0047] S301. At the beginning of the collection period, collect a local reference signal, a reference signal received by the first antenna, and a reference signal received by the second antenna;

[0048] Here, the reference signal and the local reference signal belong to homologous signals.

[0049]S302. Obtain the first reference time difference according to the local reference signal and the reference signal received by the first antenna, and obtain the second reference time difference according to the local reference signal and the reference signal received by the second antenna;

[0050] S303. Use the difference between the first reference time difference a...

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Abstract

The invention discloses a reference time difference determination method and system. According to the method provided by the invention, local reference equipment is introduced and provides a local reference signal, the signal-to-noise ratio of the local reference signal can be far greater than the signal-to-noise ratio of a reference signal, so that the reference signal can be transmitted by adopting a relatively large bandwidth, and the interference of the reference signal on the normal communication of a satellite can be avoided. Because the reference signal does not interfere with the normal communication of the satellite any more, the reference signal does not need to additionally apply for satellite resources, and the satellite resources are saved.

Description

technical field [0001] The invention belongs to the technical field of satellite positioning, and in particular relates to a method and system for determining a reference time difference. Background technique [0002] At present, the positioning method for interference targets is generally realized by double-star or multi-star positioning, such as figure 1 Shown is the double-star positioning method, in figure 1 In the method shown, two antennas are used to receive the interference target signal transmitted from two satellites. After the interference target sends out the signal, the time when antenna A receives the main satellite is T1=d1+u1, where u1 is the interference target The transmission time of the signal to the main satellite, d1 is the time from the main satellite signal to the antenna A; the time when the antenna B receives the adjacent satellite is T2=d2+u2, where u2 is the transmission time of the interference signal to the adjacent satellite, d2 It is the tim...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01S19/42G01S19/23G01S19/21
CPCG01S19/42G01S19/23G01S19/21
Inventor王争儿曹智
Owner慧众行知科技(北京)有限公司