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Simulation method of signal acquisition process of inter-satellite link based on orbit prediction

An inter-satellite link and signal capture technology, applied in the field of satellite communications, can solve problems such as the inability to describe the process of inter-satellite link signal capture, and achieve strong practical reference value and accurate simulation results

Active Publication Date: 2019-03-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the traditional simulation method cannot accurately describe the signal acquisition process of the inter-satellite link between the medium and low orbit satellites

Method used

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  • Simulation method of signal acquisition process of inter-satellite link based on orbit prediction
  • Simulation method of signal acquisition process of inter-satellite link based on orbit prediction
  • Simulation method of signal acquisition process of inter-satellite link based on orbit prediction

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 This embodiment will be described. The simulation method of the inter-satellite link signal acquisition process based on orbit prediction described in this embodiment, the method includes the following steps:

[0020] Step 1. Obtain the predicted trajectory of the user satellite relative to the relay satellite;

[0021] Step 2. Select the scanning method adopted by the relay satellite, and set the scanning step factor;

[0022] Step 3, using the standard deviation of the total pointing error of the relay satellite to obtain the uncertain region scanned by the relay satellite;

[0023] Step 4. According to the uncertain region scanned by the relay satellite determined in step 3, then use the scanning method determined in step 2 and the predicted trajectory of the user satellite relative to the relay satellite obtained in step 1 to perform Monte Carlo simulation to obtain the relay satellite The acquisition probability...

specific Embodiment approach 2

[0025] Specific implementation mode two: this implementation mode further limits the simulation method of the orbit prediction-based inter-satellite link signal acquisition process described in the first implementation mode, and the specific process of the step one is:

[0026] Import the orbital parameters of the relay satellite and the user satellite into STK, and establish the connection relationship between the relay satellite and the user satellite, and obtain the predicted trajectory of the user satellite relative to the relay satellite through the modeling and calculation functions of STK.

specific Embodiment approach 3

[0027] Specific embodiment three: this embodiment further limits the simulation method of the orbit prediction-based inter-satellite link signal acquisition process described in the first embodiment, and the specific process of the second step is: select the scanning mode of the relay satellite It is an equidistant and constant linear speed helical scanning method, where the scanning parameter only has one parameter, the step size factor. The selection of the step size factor is related to the beam spread angle of the relay satellite launch beam and the jitter of the platform,

[0028] Set the step size factor of the scan to I θ :

[0029] I θ = θ b k f ·(1-k)

[0030] Among them, I θ is the step factor of the scan, θ b is the beam divergence angle of the relay satellite scanning beam; k f is the scaling factor and k is the overlay coverage factor.

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Abstract

The simulation method of signal acquisition process of inter-satellite link based on orbit prediction is used in the field of satellite communication technology. The invention solves the problem thatthe signal acquisition process of the inter-satellite link between the medium-low orbit satellites cannot be accurately described by the traditional simulation method. The invention considers the influence of the motion trajectory of the user satellite, Therefore, the simulation result obtained based on the invention can be more accurate, and the significance of the invention also lies in that after accurately obtaining the acquisition time and the acquisition probability of the medium and low orbit targets, the acquisition strategy used in the satellite acquisition process can be adjusted, and the simulation result has strong practical reference value. The invention can be applied to the field of satellite communication technology.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a simulation method for an inter-satellite link signal acquisition process. Background technique [0002] In the aerospace communication system, the tracking and data relay satellite system is a system that provides data relay, continuous tracking, and precise orbit measurement and control services between spacecraft in medium and low orbits, and between spacecraft and ground stations. Tracking and data relay satellite system, as an important means to enhance space information transmission capability, improve the timeliness of information acquisition, and rapid response capability, has been vigorously developed in all the aerospace powers in the world. The key technology for establishing an inter-satellite link in the tracking and data relay satellite system is "inter-satellite target acquisition and tracking pointing control technology". The mathemati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 马永奎黄浩张佳岩赵洪林高玉龙
Owner HARBIN INST OF TECH
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