S-band unified measurement and control system and its side tone extraction module and ranging tone forwarding method

Abstract

The utility model discloses a sidetone extraction module, which comprises a phase-locked loop and a digital frequency synthesizer, wherein the phase-locked loop is used for receiving and tracking a sine distance measuring tone signal which is received by a satellite, and obtaining and outputting the frequency and phase of the sine distance measuring tone signal, and the digital frequency synthesizer is connected with the output end of the phase-locked loop through a circuit, and is used for regenerating and outputting the sine distance measuring tone signal according to the outputted frequency and phase of the phase-locked loop. The sidetone extraction module has the advantages that a digital Costas loop with narrow loop bandwidth, small loop noise and high tracking accuracy is used for tracking the sine distance measuring tone signal generated by a ground station to obtain the frequency and phase of the sine distance measuring tone signal, and then the sine distance measuring tone signal is duplicated by the digital frequency synthesizer, and is sent to a downlink link modulator to modulate the phase of a downlink carrier, so the stability is high, the resource consumption is decreased, the system complexity is decreased, and the resource consumption is further decreased; the tracking bandwidth is small, the tracking accuracy is higher, and the high-accuracy forwarding of the distance measuring signal is realized.

Description

technical field [0001] The invention discloses a high-precision forwarding technology of a ranging tone signal in a satellite measurement and control transponder, and in particular relates to an S-band unified measurement and control system, a side tone extraction module thereof, and a ranging tone forwarding method. Background technique [0002] The S-band unified (USB) measurement and control system uses a side tone wheel-based ranging system for satellite ranging. The basic principle is: the ground station sends a set of sine wave signals of a specific frequency to the satellite, and after being forwarded by the satellite transponder Then it is received by the ground station, and the phase difference between the sent signal and the received signal is measured to calculate the distance of electromagnetic wave transmission. [0003] In this processing flow, the on-board transponder is mainly responsible for forwarding the ranging signal sent by the ground station, and the t...

AI Technical Summary

Problems solved by technology

[0004] Because the side tone signal needs to be compared with the distance and has precision requirements, the performance requirements of the filter are relatively high. The frequencies of 8kHz (remote control subcarrier), 16kHz, 20kHz, and 100kHz are relatively close to each other, and they need to be filtered out. These characteristics determine that the order of the filter used for side tone forwarding will be relatively high, so the traditional narrowband filtering forwarding method needs to consume a lot of resources; in addition, in the field of satellite measurement and control, the satellite distance is from hundreds of kilometers It ranges from hundreds of thousands of kilometers to hundreds of thousands of kilometers, which makes the satellite ranging system have the characteristics of long communication distance, large propagation loss, and high dynamic signal. Therefore, the signal-to-noise ratio of the uplink signal received by the satellite transponder is very low, accompanied by large The method of Doppler frequency shift and band-pass filter forwarding does not perform in-depth signal processing, so that the signal-to-noise ratio of the forwarded ranging signal is low, and the ranging accuracy of the ground station cannot be guaranteed.

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