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A space-borne all-digital usb answering machine

An all-digital, transponder technology, applied in the field of satellite communications, can solve problems such as low reliability and sensitivity to orbital single event effects, and achieve the effects of convenient debugging, simple parameter modification, and reduced volume

Active Publication Date: 2021-06-11
AEROSPACE DONGFANGHONG SATELLITE
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The existing digital implementation method of USB transponder based on SRAM type FPGA, this type of FPGA is sensitive to single event effect in orbit and has low reliability

Method used

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  • A space-borne all-digital usb answering machine
  • A space-borne all-digital usb answering machine

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Embodiment Construction

[0031] Further description will be made below in conjunction with the accompanying drawings of the description.

[0032] Such as figure 1As shown, a space-borne fully digital USB transponder includes: a radio frequency receiving channel, a radio frequency transmitting channel, a baseband ASIC module, a remote control FPGA module, a management execution unit (Management Execution Unit, MEU), and a power management module; the radio frequency receiving channel adopts two The secondary frequency conversion scheme realizes the down-conversion of the uplink RF signal and the AGC control of the uplink RF signal; the RF transmission channel adopts the secondary frequency conversion scheme to realize the up-conversion of the downlink IF signal; the baseband ASIC module completes the acquisition and demodulation of the uplink IF remote control signal and the remote measurement signal Modulation delivery, tracking and forwarding of ranging tone signals, etc., output downlink modulated i...

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Abstract

An on-board full-digital USB transponder belongs to the technical field of satellite communication and is applied to a spacecraft measurement and control subsystem. The invention adopts the ASIC chip to realize the fully digital baseband signal processing of the USB transponder, wherein the carrier demodulation, subcarrier demodulation, downlink carrier modulation and subcarrier modulation are all realized digitally, the parameters of the baseband ASIC module can be configured, the parameter modification is simple, and the debugging It is convenient, easy to implement in engineering, has strong versatility and high flexibility; at the same time, remote control FPGA is used to realize remote control command decoding, uplink data frame descrambling and CRC verification, and the remote control and telemetry interfaces are in digital format, which is easy to integrate and simplify debugging; The MEU management execution unit integrates various interfaces such as AD, LC801E single-chip microcomputer, serial port, CAN bus, OC driver, etc., which reduces the volume, reduces the weight, has a high degree of integration, and can realize on-orbit autonomous management and software upgrade; the invention has a simple structure and integrates High degree, especially suitable for small satellites.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and is applied to a spacecraft measurement and control subsystem. Background technique [0002] As an important part of the measurement and control subsystem, the USB transponder provides a two-way radio frequency transmission channel between the satellite and the measurement and control ground station, and cooperates with the measurement and control ground station to complete tasks such as satellite tracking, remote control, and telemetry. [0003] The USB transponder is an analog system measurement and control transponder, which works in the S-band unified carrier measurement and control system (that is, the USB measurement and control system, Unified S-Band TT&C System). It is a frequency division system using subcarrier modulation. The signals are respectively modulated on different sub-carriers, and then modulated onto a unified carrier. Different subsystems share a carrier f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
CPCH04B7/18519
Inventor 高阳韩孟飞窦骄徐锡超李泓杉
Owner AEROSPACE DONGFANGHONG SATELLITE
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