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A satellite communication system based on suppressing narrowband interference

A satellite communication system and narrow-band interference technology, applied in the field of satellite communication systems, can solve the problems of not being able to improve the spectrum utilization rate of the satellite communication system, not considering inter-carrier interference elimination processing, not considering signal separation, etc., to meet Nyquis special features, improve spectrum utilization, and eliminate the effect of spectrum leakage

Active Publication Date: 2020-07-17
SPACETY CO LTD (CHANGSHA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the interference source is not located on a certain subcarrier frequency, spectrum leakage will occur, and narrowband interference will affect all adjacent subcarriers
And it does not consider the cancellation of inter-carrier interference
This invention also does not consider the separation of each component signal when the frequencies of the signals overlap with each other, and cannot improve the spectrum utilization rate of the satellite communication system

Method used

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  • A satellite communication system based on suppressing narrowband interference
  • A satellite communication system based on suppressing narrowband interference
  • A satellite communication system based on suppressing narrowband interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The present invention provides a satellite communication system based on suppressing narrow-band interference, which at least includes at least one navigation satellite 1 and several relay stations 2 communicating with each other. For example, if figure 1 As shown, the multi-channel satellite communication system includes a navigation satellite 1, a first relay station 2a and a second relay station 2b. The first relay station 2a can send the data signal it receives to the navigation satellite 1, and then relay it to the second relay station 2b through the navigation satellite 1. Similarly, the second relay station 2b can also relay the data signal it receives to the first relay station 2a through the navigation satellite 1 . The first relay station 2a and the second relay station 2b may separately have their respective gateways, and all gateways may be communicatively coupled to each other through a common network.

[0047] preferred, such as figure 2 As shown, the ...

Embodiment 2

[0065] This embodiment is a further improvement on Embodiment 1, and repeated content will not be repeated here.

[0066] See you again figure 1 , the first relay station 2a can send the first signal to the navigation satellite 1, and then relay the first signal to the second relay station 2b through the navigation satellite 1. When the second relay station 2b transmits the second signal to the navigation satellite, the second relay station 2b can simultaneously receive the echo of the second signal and the first signal as a combined signal. Similarly, the first relay station 2a can simultaneously receive the echo of the first signal and the second signal as a combined signal. The first relay station 2a and the second relay station 2b can eliminate the interference caused by the echo through the echo cancellation method, and the demodulation of the first signal and the second signal can be facilitated by canceling the echo. The first signal and the second signal are subject ...

Embodiment 3

[0075] This embodiment is a further improvement on the foregoing embodiments, and repeated content will not be repeated here.

[0076] Preferably, when the navigation satellite 1 and the relay station 2 communicate with each other, the navigation satellite 1 can also receive a combined signal composed of various component signals. The combined signal may include a demand signal and an interference signal, and the demand signal refers to a signal that needs to be relayed and transmitted through the navigation satellite 1 . The navigation satellite 1 also includes an analog-to-digital conversion module 105 , a windowing module 106 , a separation module 107 , a regeneration module 108 , a delay module 109 , a cancellation module 110 and an inversion module 111 . A multi-channel transmission is established between the navigation satellite 1 and the relay station 2, and the signals transmitted by the multi-channel may overlap in frequency, thereby improving the utilization rate of ...

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Abstract

A satellite communication system based on suppressing narrowband interference, the navigation satellite is configured to process the combined signal in the following manner: the windowing module is configured to limit the frequency of the combined signal based on windowing processing to generate a window processing the signal; the interference identification module is configured to process an nth power of the signal based on the window to determine the modulation characteristic of at least one component signal and the symbol rate of its corresponding carrier; the separation module is configured to process at the window In the case that the signal is processed based on the nth power to generate at least one continuous wave, the window processing signal is resampled based on m times the symbol rate to generate a resampled signal, and at least one symbol track and at least one modulation type; the regeneration module configured to compositely regenerate the constituent signals based on the symbol trajectory and the modulation type to generate a composite signal.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a satellite communication system based on suppressing narrow-band interference. Background technique [0002] The main job of the global satellite navigation system is to provide positioning, speed measurement, timing or navigation services for military and civilian purposes. It has been widely used in various weapon platforms and has become a common guidance method in precision guided weapons. Since the power of the satellite signal reaching the ground is much lower than the thermal noise power of the receiver, it is particularly vulnerable to various interferences. Although the satellite navigation system adopts spread spectrum communication itself to have a certain strength of anti-jamming ability, but in the face of high-intensity man-made interference, for example, anti-jamming technology must be used to improve the anti-jamming ability of the system. Most of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04B1/71H04J11/00H04L27/26
CPCH04B7/18515H04B1/71H04L27/2656H04L27/2691H04J11/0066
Inventor 杨峰任维佳杜志贵陈险峰
Owner SPACETY CO LTD (CHANGSHA)
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