Satellite antenna jitter monitoring and influence elimination analysis method and system

Abstract

The invention discloses a satellite antenna jitter monitoring and influence elimination analysis method and system. The method comprises the steps of monitoring equivalent omnidirectional radiation power of a satellite antenna and obtaining a change trend; generating an intensity model according to the change trend, and judging whether an intensity change state results from satellite antenna jitter or not; calculating theoretical response time according to a judgment result and a response time model; and selecting a matching elimination policy to finish eliminating the influence of the satellite antenna jitter according to a comparison result between the theoretical response time and practical response time. According to the method and the system, through monitoring of the satellite antenna radiation intensity threshold change condition, a response time limit value is calculated; the response time of a ground station or a user is taken as the most key technical index, and under the condition that a satellite signal and a parameter of the user or the ground station work normally or the satellite signal is not disconnected with the user or the ground station, a handover scheme and process for eliminating the influence of the antenna jitter on the signal intensity can be provided.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a method and system for monitoring satellite antenna jitter and analyzing the effect of elimination. Background technique [0002] In satellite communication, the antenna is an important part of it, which carries the reception and transmission of signals and directly affects the signal transmission between terminals. This is especially true for satellite communications. If there is no antenna for the conversion and transmission of electromagnetic waves, satellite mobile communications cannot be realized. However, in the actual application process, on the one hand, the mesh large-aperture antenna carried by the satellite is composed of multiple beams. In order to complete certain tasks such as tracking or signal relay, the satellite antenna has a tendency to become larger and larger. However, due to the limitation of the emission conditions, the antenn...

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Problems solved by technology

However, in the actual application process, on the one hand, the mesh large-aperture antenna carried by the satellite is composed of multiple beams. In order to complete certain tasks such as tracking or signal relay, the satellite antenna has a tendency to become larger and larger

However, due to the limitation of the launch conditions, the antenna generally presents an unfolded type, which makes the antenna lighter and has a certain degree of flexibility, which will cause certain jitters when transmitting signal beams or working

On the other hand, during the satellite's in-orbit operation, the larger flexible antenna will experience the influence of cosmic environmental noise, which will make the satellite's large-aperture antenna beam likely to experience instantaneous pointing jitter.

In the process of information transmission, when the satellite establishes a communication link with the user or the ground station, it needs to control the on-board antenna to accurately point to the receiver, and the jitter of the on-board antenna will cause errors and affect the pointing accuracy of the satellite antenna. Any change in the signal will have a great impact on the received signal strength of the user or the ground station

When the satellite is in the working state, the stability of the antenna will affect various aspects such as the link budget of the satellite communication network, the quality of network communication, and whether the signaling is transmitted correctly. It can reach thousands of kilometers. Once the jitter phenomenon occurs, it may make the coverage of a large area of ​​the earth inaccurate or even interrupt the network in the coverage area, seriously reducing the communication quality

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