Satellite signal forwarding system used in semi-closed environment

Abstract

The invention provides a satellite signal forwarding system used in a semi-closed environment, which is connected with a control system of an airplane, is used for performing satellite signal forwarding based on an anti-interference secondary forwarding technology on the airplane in a storeroom, and comprises an out-storeroom receiving antenna, a signal processor, an in-storeroom transmitting antenna and a forwarding antenna machine, the out-storeroom receiving antenna is arranged outside the storeroom and is used for receiving satellite signals transmitted by a satellite; the signal processor is arranged in a storehouse, and the input end of the signal processor is connected with the receiving antenna outside the storeroom through a radio frequency cable; the output end of the signal processor is sequentially connected with the in-storeroom transmitting antenna, the forwarding antenna machine and the control system of the airplane; the forwarding antenna machine and the signal processor are provided with frequency offset modules used for performing frequency offset setting on input satellite signals. And the frequency offset module on the forwarding antenna machine is matched with the frequency offset module on the signal processor in frequency offset.

Description

technical field [0001] The invention belongs to the technical field of satellite positioning of aviation aircraft, and in particular relates to a satellite signal forwarding system used in a semi-enclosed environment. Background technique [0002] According to the principle of satellite positioning, the aircraft receives the satellite signals of no less than four satellites through the satellite navigation antenna, and the signal is processed by the receiver to obtain the satellite space coordinates and distance measurement value information; then the pseudo code is copied inside the receiver and copied The code is correlated with the received satellite signal, and finally the code phase is measured according to the peak value of the pseudo-code autocorrelation function, and then the spatial position of the aircraft antenna is obtained, that is, the precise positioning of the aircraft is realized. [0003] However, when aircraft positioning is performed in a semi-enclosed ha...

AI Technical Summary

Problems solved by technology

[0005] (1) The traditional transponder only receives, filters and amplifies the satellite signal outside the library, and then forwards it to the library at the same signal frequency. Although the problem of signal strength is solved, it does not effectively eliminate the prominent multipath interference in the semi-enclosed environment;

[0006] (2) The anti-jamming satellite antenna and receiver of the aircraft are more demanding in the calculation of multi-path satellite signals, and the signals that penetrate through multiple layers of media and encounter multiple reflections and weaken the strength may not be received by the satellites of the aircraft Therefore, the traditional technology that only considers signal gain and strength processing is not suitable for solving the problem of aircraft satellite positioning in a semi-enclosed environment.

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