A TT&C transponder with reconfigurable satellite-borne s- and x-band links

Abstract

The invention provides a space-borne S-band and X-band link reconfigurable tracking, telemetry and command transponder. One receiving channel is used for performing down-conversion on S-band and X-band two uplink signals, combining the two uplink signals into one path of signal at middle frequency, performing AGC amplification filtering, and then sending the processed signals to a digital processing circuit, and then the digital processing circuit captures and demodulates remote-control signals and ranging signals by utilizing the received signals; meanwhile, digital processing software controls local frequency of the receiving channel and an emission channel according to S-band and X-band coincidence frequency calculation, and sends telemetered signals and forward ranging signals to the emission channel; and meanwhile, local frequency point setting is performed by software calculation, one receiving and transmitting channel is utilized to achieve uplink and downlink reconfiguration in an S band and an X band, so that the weight, the size and the power consumption of products are reduced, tracking, telemetry and command requirements of a moon relay satellite are met, the S band and the X band are utilized to complete tracking and telemetry of a satellite under a uniform carrier wave system, an uplink and downlink reconfiguration function is achieved, and uplink and downlink signal frequency is changed according to commands, so that forward and backward link requirements of a moon rover are met.

Description

technical field [0001] The invention relates to a measurement and control transponder with reconfigurable satellite-borne S and X frequency band links, belonging to the technical field of satellite measurement and control. Background technique [0002] In recent years, my country has continued to conduct lunar exploration through the Chang'e series satellites. Among them, the lunar rover carried by the Chang'e-3 satellite has successfully landed on the lunar surface facing the earth to carry out exploration work. But so far, no country in the world has carried out exploration work on the back surface of the moon. The Chang'e-4 satellite developed by my country will carry a lunar rover for the first time to realize the detection of the back surface of the moon by humans. The communication between the lunar rover and the ground requires a lunar relay satellite for data transmission. [0003] The main function of the measurement and control transponder of the lunar relay satel...

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Problems solved by technology

[0005] The transponder mentioned above cannot meet the requirements of the lunar relay satellite that the transponder can work in the S and X frequency bands at the same time, and the weight, volume and power consumption are the smallest, that is, the S and X can be established with the simplest design scheme. The forward and return links of the frequency band can realize the measurement and control mission requirements of the ground and the moon

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