Probability based dynamic tracking phase calibration method of spaceborne satellite communication earth station

Abstract

The invention provides a probability based dynamic tracking phase calibration method of a spaceborne satellite communication earth station, and aims at improving the tracking performance of a servo system of the spaceborne satellite communication earth station. In the dynamic environment, the servo system generates an orientation tracking error voltage and a pitching tracking error voltage when tracing an object. On the basis of the orientation error voltage and the pitching error voltage, an error integrated angle in polar coordinates is calculated, the error integrated angle is compared in the time sequence to determine clockwise / anticlockwise rotation, the frequency of clockwise / anticlockwise rotation is calculated, a generation probability is generated, and a phase adjusting directionand angle are reckoned. According to the method of the invention, the tracking phase calibration precision is high, the servo system of the spaceborne satellite communication earth station works in the optimal phase point, and the tracking performance is improved greatly; the hardware structure of the spaceborne satellite communication earth station needs not to be adjusted, convenience is provided for enforcement, and the cost is low; and the method can be applied to other radio equipment or systems, as a shipbone radar, which need tracking phase adjustable, and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of radio tracking, in particular to a probability-based method for dynamically calibrating shipborne satellite communication earth station tracking phase. Background technique [0002] Satellite communication is the most important means for ships to communicate with ships. Due to the shaking of the ship in the ocean environment, the satellite communication earth station needs to use the servo system to realize the satellite pointing of the antenna. The servo system of the shipborne satellite communication station mostly adopts the monopulse tracking system, which has the characteristics of high tracking accuracy and strong anti-interference ability. However, various environmental factors such as temperature and humidity changes will cause changes in the tracking phase of the servo system of the shipborne satellite communication station, resulting in deterioration of cross-coupling and affecting antenna trac...

AI Technical Summary

Problems solved by technology

However, various environmental factors such as changes in temperature and humidity will cause changes in the tracking phase of the servo system of the shipborne satellite communication station, resulting in deterioration of cross-coupling and affecting antenna tracking performance.

[0003] The phase calibration methods commonly used by shipborne satellite communication stations are as follows: manual phase calibration, which needs to be carried out under static conditions, and the accuracy of calibration phase depends on the accuracy of the shipborne satellite communication station's alignment with the target center and the experience of the operator; Based on the automatic phase calibration of the earth pointing, the calibration phase accuracy of this method is low, the error is about 20°, and it is invalid in the case of large dynamics of the ship; RF-assisted phase calibration, this method needs to install a radio frequency transmission source on the shipborne satellite communication station , the reference phase needs to be provided before the phase calibration. Due to the existence of near-field effect, the phase calibration accuracy is low and the repeatability is poor; The system hardware changes greatly and the cost is high

[0004] In a dynamic environment, the traditional shipborne satellite communication station servo system phase calibration method has problems such as poor accuracy, resulting in a large cross-coupling in the servo system, which affects the servo tracking performance

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