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A kind of satellite communication system and its return calibration method

A satellite communication system and satellite communication technology, applied in the field of satellite communication system and its return calibration, can solve the problems of complex system, large amount of equipment, high maintenance cost, etc., achieve low power, reduce space and equipment amount, and reduce complexity degree of effect

Active Publication Date: 2017-11-24
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

However, 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 kind of satellite communication system and its return calibration method
  • A kind of satellite communication system and its return calibration method
  • A kind of satellite communication system and its return calibration method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0026] see also figure 1 , figure 2 , image 3 , describe the first embodiment of the present invention, there is a ground station 1 on the ground in this embodiment, and the data of ground station 1 has 10 passages needs to be transmitted to the satellite 2 on the star, and the data bandwidth of each passage is 7MHz, 10 The data of each channel is transmitted by means of frequency division multiplexing. Considering the isolation of each channel, the interval between each adjacent frequency point is taken as 10MHz when performing frequency division multiplexing.

[0027] 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 antenna 15, a first frequency division multiplexer 16, a channel corrector 17, and a despreading processor 18.

[0028] The spread spectrum signal generator 12 is used to generate a spread spectrum correction signal so that the correction signa...

Embodiment 2

[0037] Another embodiment of the present invention is a scenario where distributed ground stations are used. Refer to Figure 4. There are two ground stations, Ground Station 1 3 and Ground Station 2 4. There are 40 channels of data in the forward direction of the system that need to be transmitted by the ground. On the satellite, that is satellite 5, there are 80 channels of data to be transmitted from the star to the ground station in the return direction, and the bandwidth of each forward channel data and return channel data is 7MHz.

[0038] Two directional transmitting antennas are configured on the star, pointing to two ground stations respectively. The transmitting antenna 1 51 on the star transmits 40 return channel data to the ground station 1 3, and the transmitting antenna 2 52 on the star transmits the other 40 data to the ground station 2 4 Return channel data. Ground station 1 3 has 40 forward channel data to be transmitted to satellite 5, each forward channel dat...

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Abstract

The invention discloses a satellite communication system and a backward calibration method of the satellite communication system. According to the satellite communication system, a coupling network is added on the back face of a backward receiving antenna, correction signals are generated from a ground station in a spread spectrum mode, the correction signals are accessed to the coupling network after being received and processed forwards by a satellite, and then the correction signals are coupled to each backward data receiving channel and transmitted to the ground station along with backward user data; the ground station carries out dispreading processing on the spread spectrum correction signals to obtain time delay information, amplitude information and phase information of the channels, and therefore backward calibration is completed. According to the satellite communication system and the backward 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; the signals in the spread spectrum mode are adopted, so on-line calibration of user transmission will not be interrupted.

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 back calibration method thereof. Background technique [0002] In the satellite communication system based on ground beamforming, since beamforming is performed on the ground, the signals of multiple channels received on the return star need to be transmitted to the ground station through the feeder link, and the data of multiple channels is usually multiplexed by frequency division The wideband signal synthesized by the method is transmitted to the ground station through the feeder link, and then the ground station separates the data of multiple channels for beamforming. However, due to the influence of the wireless channel and microwave components of the feeder link, different frequency bands of frequency division multiplexed broadband signals will...

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 张正宇骆再红王庆华吴瑞荣
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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