Satellite signal capturing method and device, equipment and storage medium

A satellite signal acquisition and satellite signal technology, applied in the field of satellite communication, can solve the problems of long time consumption, heavy workload, loss of tracking loop of satellite navigation receiving equipment, etc., and achieve the effect of saving resources and reducing workload

Pending Publication Date: 2022-06-28
亚太卫星宽带通信(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In environments such as urban high buildings, tunnels, mountains, etc., satellite signals are often interrupted due to occlusion, which leads to the loss of the tracking loop of the satellite navigation receiving equipment and the inability to generate effective positioning information.
At present, there are two reacquisition methods after the satellite signal loses lock: one is recapture, which is generally used when the lockout time is too long, resulting in unpredictable tracking information. The existing recapture methods are large-scale, Re-searching satellite signals in a wide-spreading manner for capture and tracking requires a large workload and takes a long time; one is quick recovery, and if the lock-losing time is short, the corresponding tracking information can still be predicted through iterative calculation of the tracking channel. To quickly switch to the tracking state of the original satellite signal after the satellite signal is restored, but this method consumes a lot of resources for the tracking channel, and is only applicable to the case of a short lock-out time. If the lock-out time is too long, it will fail

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  • Satellite signal capturing method and device, equipment and storage medium
  • Satellite signal capturing method and device, equipment and storage medium
  • Satellite signal capturing method and device, equipment and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0064] This embodiment provides a satellite signal acquisition method, such as figure 1 shown, including:

[0065] S101. When the satellite signal receiver detects that the satellite signal is out of lock, close the corresponding tracking channel, and latch the prior information before the satellite signal is out of lock.

[0066] Specifically, as figure 2 As shown, the process of detecting the loss of lock of the satellite signal by the satellite signal receiver includes:

[0067] Obtain the signal power and noise floor of the satellite signal by tracking the satellite signal receiver;

[0068] The number M of times that the signal power is continuously smaller than the noise floor is obtained by comparison, and when the number of times M is greater than a preset threshold value N, it is determined that the satellite signal is out of lock. For example, if the signal power for the first time is less than the noise floor, the count is 1; the signal power for the second time...

Embodiment 2

[0099] This embodiment provides a satellite signal acquisition device, such as Figure 4 shown, including:

[0100] The locking unit is used to close the corresponding tracking channel when the satellite signal receiver detects that the satellite signal is out of lock, and latches the prior information before the satellite signal is out of lock;

[0101] The first determining unit is used to acquire the movement data of the satellite signal receiver in real time, and calculate and determine the real-time speed information and position information of the satellite signal receiver relative to the center of the earth according to the movement data of the satellite signal receiver;

[0102] The second determining unit is used to determine the corresponding lost-lock satellite according to the prior information, and determine its real-time speed information and position information relative to the center of the earth according to the ephemeris of the lost-lock satellite;

[0103] ...

Embodiment 3

[0114] This embodiment provides a satellite signal acquisition device, such as Figure 5 shown, including:

[0115] A satellite signal receiver for receiving satellite signals;

[0116] memory for storing instructions;

[0117] A signal processor, configured to read the instructions stored in the memory, and execute the satellite signal acquisition method in Embodiment 1 according to the instructions.

[0118] The satellite signal receiver may, but is not limited to, use a code correlation type receiver; the memory may, but is not limited to, include a random access memory (Random Access Memory, RAM), a read-only memory (Read Only Memory, ROM), a flash memory ( Flash Memory), First Input First Output (FIFO) and / or First In Last Out (FILO), etc.; the signal processor may, but is not limited to, include a single-chip microcomputer, an ARM processor, etc.; Corresponding tracking loop control module and acquisition control module can also be set to interface with the signal pro...

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PUM

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Abstract

The invention relates to the technical field of satellite communication, in particular to a satellite signal capturing method and device, equipment and a storage medium. Comprising the following steps: closing a tracking channel when detecting that a satellite signal loses lock, and latching prior information before the satellite signal loses lock; acquiring mobile data of the satellite signal receiver in real time, and determining real-time speed information and position information of the satellite signal receiver relative to the earth center; determining real-time speed information and position information of the unlocked satellite relative to the earth center according to the ephemeris of the unlocked satellite; calculating to obtain a real-time Doppler frequency predicted value and a code phase predicted value; and according to the Doppler frequency predicted value, the code phase predicted value and a preset error range, re-capturing a satellite signal of the lock losing satellite, and opening a tracking channel to perform signal tracking. According to the method, the corresponding capture parameters can be predicted in real time to quickly and efficiently complete the re-capture of the lock losing satellite signal.

Description

technical field [0001] The present invention relates to the technical field of satellite communication, in particular to a satellite signal acquisition method, device, equipment and storage medium. Background technique [0002] With the continuous development of satellite navigation and its application technology, satellite navigation has become the three pillar industries in the field of information technology along with the Internet and mobile communications. As a basic information system, satellite navigation system can provide global navigation, positioning and timing services. The application of satellite navigation has penetrated into all aspects of people's daily life and will have an increasing impact. Existing global satellite navigation systems (GNSS) include Beidou satellite navigation system, GPS system, GLONASS system and Galileo system. The satellite navigation process is realized by the docking of the navigation satellite and the ground receiving equipment. T...

Claims

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Application Information

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IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 李杰庞立新宋振林丁广林闫文凯
Owner 亚太卫星宽带通信(深圳)有限公司
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