A satellite signal transponder system used in a semi-enclosed environment

Abstract

The present invention proposes a satellite signal forwarding system used in a semi-enclosed environment, which is connected to the control system of the aircraft and used to perform satellite signal forwarding based on the anti-jamming secondary forwarding technology for the aircraft in the warehouse. The satellite signal The forwarding system includes a receiving antenna outside the warehouse, a signal processor, a transmitting antenna in the warehouse, and a forwarding antenna machine; the receiving antenna outside the warehouse is arranged outside the warehouse for receiving satellite signals transmitted by satellites; the signal processor is arranged in the warehouse , and the input end of the signal processor is connected with the external receiving antenna of the storehouse by the radio frequency cable; The signal processor is provided with a frequency offset module for setting the frequency offset of the input satellite signal; and the frequency offset between the frequency offset module on the repeating antenna machine and the frequency offset module on the signal processor is matched.

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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