A Simultaneous and Same-Frequency Full-duplex Measurement and Control Transponder

Abstract

The invention discloses a simultaneous and same-frequency full-duplex measurement and control transponder, which includes a passive self-interference cancellation module, a radio frequency self-interference cancellation module, a transceiver channel and a digital signal processing module; the passive self-interference cancellation module utilizes space signal attenuation or device isolation mode Realize the attenuation of the self-interference signal entering the receiver, the radio frequency self-interference cancellation module uses the LMS algorithm or the RLS algorithm to realize the secondary cancellation of the self-interference signal in the analog domain; the transmission channel of the transceiver channel module realizes the modulated digital signal Digital-to-analog conversion, filtering, up-conversion and power amplification functions, the receiving channel realizes the functions of filtering, down-conversion, automatic gain control and analog-to-digital conversion of the received signal; the digital signal processing module realizes digital processing of signals in the digital domain, including Functions such as digital up-down conversion, digital modulation and demodulation, filtering and digital self-interference cancellation. The invention achieves the purpose of saving frequency band resources.

Description

technical field [0001] The invention relates to electric communication technology, in particular to a simultaneous and same-frequency full-duplex measurement and control transponder. Background technique [0002] The measurement and control transponder is the key spaceborne equipment in the measurement and control subsystem of the spacecraft. It is the link between the spacecraft and the ground to realize the interconnection and intercommunication. [0003] The working frequency band of the measurement and control transponder needs to match the ground measurement and control system, and generally works in the S frequency band, UHF frequency band or C frequency band. In the channel design of the measurement and control transponder, the modulation of the telemetry and remote control signals adopts subcarrier modulation and the data modulation method is BPSK or QPSK, and the ranging signal adopts PM or FM modulation. [0004] The center carrier frequencies of the uplink and do...

AI Technical Summary

Problems solved by technology

[0004] The center carrier frequencies of the uplink and downlink channels of the current mainstream TT&C transponders are different. Based on the different-frequency full-duplex method of the uplink and downlink channels, the full-duplex communication with the ground station is realized, resulting in the TT&C transponders occupying more spectrum resources.

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