Antenna beam tracking device and method of moving communication satellite communication system

Abstract

The invention discloses antenna beam tracking device and method of a moving communication satellite communication system. The antenna beam tracking device comprises a geographical position detection device, a carrier gesture detection unit, a signal intensity detection unit, a signal conditioning circuit and a master control computer, wherein the master control computer controls a servo driver; and the servo driver controls an azimuth and pitching motor. The antenna beam tracking method comprises the following steps of: 1, initially capturing a target satellite; 2, tracking: setting initial parameters, storing and updating the initial parameters in real time, generating simultaneous disturbance random vectors, driving disturbance, measuring the intensity of received signals, estimating gradient, determining tracking error signals, regulating antenna beam pointing directions, and judging the received signals; and 3, recapturing. The invention has the advantages of simple design, low cost, system implementation without changing the hardware structure of an original tracking system, easy operation, high tracking accuracy and fast tracking speed and overcomes the defects of inconvenient operation, complex tracking step, lower tracking accuracy and tracking speed, and the like of the traditional method.

Description

technical field [0001] The invention belongs to the technical field of satellite communication system antenna beam tracking, and in particular relates to a satellite communication system antenna beam tracking device and tracking method in motion. Background technique [0002] With the development of economic globalization and informatization, people urgently need to be able to transmit or receive broadband, large-capacity voice, data, images, videos, etc. Multimedia information in order to grasp the rapidly changing situation faster and more accurately. Satellite communication is the only communication system that can provide different business requirements in different environments at the same time. However, due to the low bandwidth allocated by ITU to satellite mobile services, it is difficult to meet the needs of broadband communication services. The "communication in motion" communication system based on the fixed satellite service provides the possibility for the real...

AI Technical Summary

Problems solved by technology

[0004] The tracking technologies of fixed satellite communication ground stations have been widely known, such as manual / program tracking, step tracking, conical scanning tracking and monopulse tracking, etc. The latter three tracking algorithms can automatically track satellites after capturing satellite signals, so they are collectively referred to as Although these three automatic tracking technologies can be applied to the design of the communication-in-motion tracking system, they restrict the popularization and application of the system to varying degrees. For example, the realization of conical scanning and monopulse tracking must introduce additional devices , will increase the complexity and cost of the system; traditional step tracking has defects and deficiencies such as dynamic lag, low tracking accuracy, and slow tracking speed

Invention patent application CN1469132A published on January 21, 2004 (patent application number is 02126611.5) discloses a kind of tracking method based on gradient method suitable for mobile satellite ground station system, but its tracking process is in the azimuth and elevation plane Alternately, it affects the speed of tracking and the performance of the system

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