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Autonomous navigation signal enhancement method based on low-earth-orbit satellites

A low-orbit satellite and autonomous navigation technology, applied in the aerospace field, can solve the problems of expensive equipment, difficulty in wide application, and small service range, and achieve the effects of flexible form, improved enhancement effect, and rapid geometric position change

Active Publication Date: 2018-11-30
WUHAN UNIV
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  • Abstract
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Problems solved by technology

The existing GNSS signal enhancement methods, including pseudolites, GPS transponders and other equipment are all ground-based enhancement methods, the service range is small, and the equipment is expensive, so it is difficult to be widely used

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  • Autonomous navigation signal enhancement method based on low-earth-orbit satellites
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  • Autonomous navigation signal enhancement method based on low-earth-orbit satellites

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Embodiment Construction

[0043] In order to illustrate the present invention and / or the technical solutions in the prior art more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0044] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0045] figure 1The LEO satellite autonomous navigation enhanced load shown includes GNSS receiving module, main control module, tr...

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Abstract

The invention discloses an autonomous navigation signal enhancement method based on low-earth-orbit satellites. The method is implemented by use of a load carried on the low-earth-orbit satellites, wherein the load comprises a GNSS receiving module, a main control module, an emission module, a high-stability clock module, at least one set of GNSS signal receiving antennas and at least one set of enhancement information emission antennas; the GNSS receiving module is used for capturing and tracking navigation satellite signals and performing on-satellite autonomous orbit determination and autonomous time service; the main control module is used for interacting data with the GNSS receiving module and the emission module; the emission module is used for coding result data of on-satellite autonomous orbit determination and autonomous time service into telegraph texts and performing signal modulation and broadcasting; and the high-stability clock module is used for providing a time-frequency benchmark. According to the method, by uniting low-earth-orbit satellite navigation enhancement information and the navigation satellite signals to perform navigation positioning, the precision, availability and reliability of navigation positioning can be effectively improved. Besides, the method does not depend on a ground station, so that application is more flexible compared with a ground-based enhancement technology.

Description

technical field [0001] The invention belongs to the fields of aerospace and satellite navigation, and in particular relates to a method for enhancing autonomous navigation signals based on low-orbit satellites. Background technique [0002] The global satellite navigation system (GNSS) can provide continuous and real-time positioning services around the world, and is widely used in many fields of national economic construction. The existing GNSS system can well solve most of the application requirements, but it also has certain vulnerabilities, including: (1) The signal is easily interfered, and the signal strength of the GNSS signal reaching the surface of the ground antenna is about -150dBw to -160dBw, dozens of dB lower than noise. Once there is an interference source with a strong signal on the ground, it may lead to the paralysis of satellite positioning services in a large area; (2) the signal penetration ability is weak, which cannot solve the problems of signal occl...

Claims

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Application Information

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IPC IPC(8): G01S19/21G01S19/33G01S19/37
CPCG01S19/21G01S19/33G01S19/37
Inventor 王磊陈锐志陈亮李德仁
Owner WUHAN UNIV
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