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Inline interference suppression based geostationary orbit (GEO) and non-geostationary orbit (NGEO) communication satellite spectrum sharing method

A communication satellite and interference suppression technology, which is applied in the field of satellite communication, can solve problems such as the performance impact of the main satellite system and the inability to guarantee the service quality of the NGEO system, and achieve the effects of improving spectrum utilization efficiency, saving energy, and increasing system capacity

Active Publication Date: 2016-07-06
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

Furthermore, the GEO satellite link operates in the Ka-band, although such interference events can be pre-determined and avoided by rational planning of the constellation geometry, but in the dynamic adjustment of these methods, the performance of the main star system will also be affected
Furthermore, the quality of service of NGEO systems cannot be guaranteed when using these static methods to try to suppress in-line conflicts

Method used

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  • Inline interference suppression based geostationary orbit (GEO) and non-geostationary orbit (NGEO) communication satellite spectrum sharing method
  • Inline interference suppression based geostationary orbit (GEO) and non-geostationary orbit (NGEO) communication satellite spectrum sharing method
  • Inline interference suppression based geostationary orbit (GEO) and non-geostationary orbit (NGEO) communication satellite spectrum sharing method

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Embodiment Construction

[0044] Step 1: Conduct interference analysis on the GEO and NGEO satellite communication systems using the same frequency band, and determine the communication satellite system in the downlink (satellite sends signals to the ground station) shared frequency scenario and uplink (ground station sends signals to the satellite) shared frequency scenario In-line interference constraints;

[0045] 1.1 Downlink shared frequency scenario analysis:

[0046] Both GEO and NGEO satellites operate in forward mode, as figure 2 As shown, there are two interference links here, as shown by the dotted line: (a) the interference link of NGEO satellite communication to the GEO ground station; (b) the interference link of GEO satellite communication to the NGEO ground station. Considering that GEO satellites are already in orbit and NEGO satellites use the same spectrum to be deployed, the NGEO link budget needs to be adjusted according to the interference of GEO satellites on NGEO links. Here ...

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Abstract

The present invention relates to an inline interference suppression based geostationary orbit (GEO) and non-geostationary orbit (NGEO) communication satellite spectrum sharing method. In the method, interference analysis is performed on GEO and NGEO satellite communication systems using the same frequency band, so as to determine inline interference constraints of the communication satellite systems in a downlink sharing frequency scene and an uplink sharing frequency scene; mathematical models of the GEO and NGEO satellites in the downlink sharing frequency scene and the uplink sharing frequency scene are established according to a power control method; and a carrier to noise ratio of an NGEO ground station and total interference of the NGEO satellite to a GEO ground station in the downlink sharing frequency scene and the uplink sharing frequency scene are calculated, and a transmitting power range of the NGEO satellite is obtained. Through adoption of the method, the spectrum use efficiency of the two satellite systems is improved, and the problem that the satellite systems cannot work simultaneously due to inline interference is solved.

Description

technical field [0001] The invention relates to a frequency spectrum sharing method for geosynchronous orbit GEO and non-geosynchronous orbit NGEO communication satellites based on in-line interference suppression, and belongs to the technical field of satellite communication. Background technique [0002] Satellite communication systems provide fixed, mobile, interactive and personal services by adopting satellites deployed in geostationary orbit (GEO) and non-geostationary orbit (NGEO). In order to solve the problem of spectrum scarcity, next-generation satellite systems require higher spectrum efficiency, and different satellite systems need to share the same spectrum. In this context, cognitive satellite communication technology was born, which provides different means to enable two kinds of satellite communication networks to share spectrum. [0003] Compared with GEO, NGEO has the following advantages, such as small free space loss, small propagation delay and low sat...

Claims

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Application Information

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IPC IPC(8): H04W16/14
CPCH04W16/14
Inventor 张建军薛明张蕾
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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