A satellite acquisition method capable of preventing mispointing of vsat antennas

Abstract

The invention provides a satellite capture method capable of preventing VSAT antenna wrong orientation. Firstly, an antenna is controlled to move to a position of the theoretical azimuth, the theoretical pitch angle and the theoretical polarization angle, then the antenna is subjected to azimuth scanning, the AGC level value and the corresponding deflection angle relative to the starting boundary are recorded at a fixed sampling rate, a local maximum set of AGC level values is established and whether there is a noise level in the range of + / - [delta][Theta] where the local maximum value appears is determined, if not, an element corresponding to the maximum AGC level value in the local maximum element and the subsequent two local maximum elements is taken as an AGC maximum, and finally according to elements of the AGC maximum set, the antenna azimuth is controlled to achieve correct alignment of the satellite. The invention realizes the correct satellite capture by the system logic judgment in the presence of other AGC levels in the direction of the satellite direction to be directed, satisfying the demand for the accurate satellite capture by the low-cost communication on the move system of the ordinary civilian fishing vessel without the heading compass.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to a satellite acquisition method capable of preventing misdirection of a VSAT antenna, enabling the VSAT antenna to accurately capture and point to the correct satellite when there are other high receiving levels near the satellite that should be pointed to satellite. Background technique [0002] At present, the research on satellite acquisition of VSAT antenna focuses on how to efficiently and smoothly control the antenna movement, how to improve the accuracy of guiding the antenna to point to the satellite, etc., but does not consider the existence of other AGC levels near the direction of the satellite that should be pointed. And in the case that this AGC level may be higher than the AGC level that should point to the satellite, how can the antenna correctly capture and point exactly to the satellite it should point to. Especially in the low-cost mobile communication sys...

AI Technical Summary

Problems solved by technology

[0002] At present, the research on satellite acquisition of VSAT antenna focuses on how to efficiently and smoothly control the antenna movement, how to improve the accuracy of guiding the antenna to point to the satellite, etc., but does not consider the existence of other AGC levels near the direction of the satellite that should be pointed. And in the case that this AGC level may be higher than the AGC level that should point to the satellite, how can the antenna correctly capture and point exactly to the satellite it should point to

Especially in the low-cost mobile communication system used by ordinary civilian fishing boats, since there is no accurate absolute azimuth sensor, it is difficult to judge whether the antenna is pointing to the accurate satellite when there is a false level, which leads to satellite communication Fault