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High-speed mobile platform TDMA satellite communication synchronization control method based on ephemeris

A high-speed mobile, mobile platform technology, applied in multiplex communications, radio transmission systems, electrical components, etc., can solve problems such as aggravating changes in Doppler frequency and transmission delay

Inactive Publication Date: 2018-07-06
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

For non-synchronous orbit satellites in low and medium orbits, it is necessary to consider the high-speed movement of satellites relative to the earth, which aggravates the changes in Doppler frequency and transmission delay, and brings reference acquisition and time synchronization problems

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  • High-speed mobile platform TDMA satellite communication synchronization control method based on ephemeris
  • High-speed mobile platform TDMA satellite communication synchronization control method based on ephemeris
  • High-speed mobile platform TDMA satellite communication synchronization control method based on ephemeris

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0027]The invention provides a high-speed mobile platform TDMA satellite communication synchronization control method based on ephemeris. The core idea is to use the broadcast high-precision ephemeris information of the satellite and the navigation information of the platform to calculate the relative radial velocity and distance between the platform and the satellite, thereby calculating the Doppler frequency and transmission round-trip delay, and then using the The frequency is used to capture the reference, and the reference information is parsed after synchronous capture, so as to perform the timing of service transmission.

[0028] The present invention comprises the following steps:

[0029] Step 1: Initialize, start the mobile platform, and obtain the navigation inf...

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Abstract

The invention provides a high-speed mobile platform TDMA satellite communication synchronization control method based on ephemeris. A radial velocity and location of a satellite relative to an earth station are obtained by using high-precision satellite ephemeris information, a platform location and a radial velocity are obtained through the navigation information of the platform, the speeds of the two components are superposed, the platform roughly estimate a distance measurement distance between the two components according to the positions of the two components according to a result compensation frequency deviation, and the platform compensates a timing deviation according to real distance measurement information and finally meets the synchronization requirements. By adoption of the high-speed mobile platform TDMA satellite communication synchronization control method provided by the invention, the Doppler frequency and delay variation caused by the high-speed movement of low orbitsatellites and the platform can be compensated.

Description

technical field [0001] The invention relates to a high-precision ephemeris time synchronization and frequency synchronization control technology for high-speed mobile platforms using broadcasting in a medium-low orbit TDMA satellite communication system, and belongs to the related technical fields of satellite mobile communication, synchronization control, and access networking. Background technique [0002] The TDMA satellite communication system has the characteristics of flexible networking and efficient satellite channel utilization, and is widely used in satellite communication systems at home and abroad. Strict synchronization control is required in the process of TDMA satellite communication, including three aspects: frequency control, timing control and power control; in TDMA satellite communication, medium and low orbit satellites are not only affected by the gravity of the earth, but also affected by other complex perturbations. The low-orbit satellite in motion al...

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Application Information

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IPC IPC(8): H04B7/185H04J3/06
CPCH04B7/18523H04B7/18582H04J3/0635
Inventor 曾业刘进刘佳
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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