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A satellite communication system and its forward calibration method

A satellite communication system and satellite communication technology, applied in satellite radio beacon positioning system, transmission system, radio transmission system, etc., can solve the problems of large amount of equipment, waste of manpower, material resources, high maintenance cost, etc., to reduce complexity, The effect of reducing the amount of space and equipment

Active Publication Date: 2017-08-29
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of setting up a calibration station to correct channel signals requires a large amount of equipment, which makes the system complex, high maintenance costs, and a waste of manpower and material resources

Method used

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  • A satellite communication system and its forward calibration method
  • A satellite communication system and its forward calibration method
  • A satellite communication system and its forward calibration method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see also figure 1 , figure 2 , image 3 and Figure 4 , to describe the first embodiment of the satellite communication system of the present invention, the satellite communication system includes at least one ground station 1 and a satellite 2 communicating with the ground station 1 by satellite. In this embodiment, there is a ground station 1 on the ground, and the data of 10 forward channels of the ground station 1 needs to be transmitted to the satellite, that is, the satellite 2. The data bandwidth of each channel is 7MHz, and the data of the 10 channels adopts frequency division multiplexing Transmission is carried out in the way, considering the isolation of each channel, the interval between each adjacent frequency point is taken as 10MHz when performing frequency division multiplexing.

[0026] The ground station 1 includes a spread spectrum signal generator 12, a first frequency division multiplexer 13, a ground transmitting antenna 14, a ground receiving ...

Embodiment 2

[0035] Another embodiment of the present invention is a scenario using distributed ground stations, please refer to Figure 5 , two ground stations are arranged on the ground, that is, ground station 1 3 and ground station 2 4, and there are 80 channels of data in the forward direction of the system that need to be transmitted from the ground to the satellite, that is, satellite 5. There are 40 channels of data in the return direction that need to be transmitted from the star to the ground, and the bandwidth of each forward channel data and return channel data is 7MHz. Two directional receiving antennas are configured on the star, that is, the first receiving antenna 51 on the satellite and the second receiving antenna 52 on the satellite, pointing to the first ground station 3 and the second ground station 4 respectively.

[0036] The ground station-3 to the on-star receiving antenna-51 transmit 40 forward channel data, and the data of 40 channels is transmitted by frequency ...

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Abstract

The invention discloses a satellite communication system and a forward calibration method of the satellite communication system. According to the satellite communication system, a plurality of mutually orthogonal spread spectrum correction signals are generated on a ground station, and are transmitted to a satellite after being subjected to frequency division multiplexing as data of each forward channel. The correction signals in each channel are accessed to a coupling network on the back face of a forward transmitting antenna of the satellite after being subjected to frequency division multiplexing on the satellite, superposed signals of the correction signals are output and transmitted to the ground as backward channel data. The ground station carries out dispreading processing on the superposed spread spectrum correction signals to obtain time delay information, amplitude information and phase information of the forward channels, and therefore backward calibration is completed. According to the satellite communication system and the forward calibration method of the satellite communication system, multiple calibration stations are not needed, and therefore the complexity of system maintenance is reduced; the spread spectrum correction signals are generated on the ground instead of being directly generated on the satellite, and therefore the amount of equipment on the satellite is reduced.

Description

technical field [0001] The invention relates to a satellite communication system and calibration means in the satellite communication of the satellite communication system, in particular to a satellite communication system and a forward calibration method thereof. Background technique [0002] In the satellite communication system based on ground beamforming, since the forward transmission beam of the satellite is formed on the ground, the data of each channel needs to be transmitted from the ground to the star through the forward feeder link after being weighted, and the data of multiple forward channels usually passes through The wideband signal synthesized by frequency division multiplexing is transmitted to the satellite through the forward satellite-ground feeder link. After the satellite receives the broadband signal of the forward feed link, it separates the data of multiple forward channels, and sends them to the forward transmit channel of the satellite user segment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
CPCG01S19/235H04B7/18519
Inventor 吴瑞荣王远王庆华张正宇骆再红
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST