A Satellite Beam Center Estimation Method for Mobile Communication System

Abstract

The invention provides a satellite wave beam center estimation method for a communication-in-moving system. According to the method, appropriate filtering processing is carried out on beacon signals obtained through sampling, an antenna is made to pass through the center position of a satellite wave beam through simple scanning motions, the scanning angles, the angular rates and the signal intensity data of all points are collected in the scanning process, and finally the scanned wave beam center position is calculated accurately by using a first order statistical moment. The satellite wave beam center estimation method for communication-in-moving system solves the problems that a satellite wave beam center scanning and calculating method of the communication-in-moving system of the prior art is easy to be interfered by noise, not high in precision, complex in control process and the like. The satellite wave beam center estimation method for communication-in-moving system can estimate the satellite wave beam center position accurately on satellite signals of different beam widths under noise interference, and has the advantages of being simple in scanning motion control, small in calculated amount, high in precision and the like.

Description

technical field [0001] The invention belongs to the field of antenna control and signal processing of a communication system in motion, and in particular relates to a satellite beam center estimation method for a communication system in motion. Background technique [0002] Mobile Communication is the abbreviation of "Moving Satellite Ground Station Communication System". Carriers such as vehicles, ships and aircraft keep the antenna pointing to track the direction of satellite signals in real time through the motion-in-motion system, and continuously transmit multimedia information such as voice, data, and images, which can meet various military and civilian emergency communications and mobile conditions. multimedia communication needs. The communication system in motion usually includes two parts: an inertial stabilization platform and a signal scanning mechanism. The inertial stabilization platform isolates the movement of the carrier through the control system composed...

AI Technical Summary

Problems solved by technology

Due to the influence of signal noise and certain characteristics of the signal itself, this method is prone to malfunctions and cannot accurately find the center of the satellite beam.

Although the conical scanning method has also undergone some filtering processing in the calculation process, it can theoretically demodulate the direction of the maximum signal strength, but in practice, due to the influence of factors such as beacon signal quality, scanning frequency, and scanning control accuracy, the The calculation accuracy of the satellite beam center is not ideal

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