Emulational USB intermediate frequency responser used for satellite test and control
A technology of transponder and simulation, which is applied in radio transmission system, electrical components, transmission system, etc. It can solve the problems of difficult debugging and maintenance, loose equipment structure, large volume, large power consumption, etc., and achieves easy simulation analysis, stable system, The effect of a short feedback branch
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[0034] Such as figure 1 As shown, the present invention "an emulation USB intermediate frequency transponder for satellite measurement and control" consists of 6 parts, including: a front-end analog-to-digital converter 10, a digital down-conversion module 20, a carrier synchronization module 30, a demodulation filter module 40, The forwarding modulation module 50 and the output analog-to-digital converter 60 complete the reception and demodulation of the intermediate frequency received signal, provide the remote control sub-carrier signal, and modulate and forward the remote measurement sub-carrier signal and the ranging signal according to a certain process. Front-end analog-to-digital converter 10 and output analog-to-digital converter 60 use off-the-shelf products; Digital down-conversion module 20, carrier synchronization module 30, demodulation filter module 40 and forwarding modulation module 50 are realized in field programmable gate array (FPGA) . The connection rela...
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