All-digital modulation satellite-borne code modulation system and method

Abstract

The invention provides an all-digital modulation satellite-borne code modulation system and method. The system comprises a power conversion circuit, a high-speed interface circuit, a clock circuit, aconfiguration circuit, an SRAM type FPGA circuit, a high-speed DAC circuit and an intermediate frequency processing circuit. The power supply conversion circuit is used for converting an external input power supply voltage into a voltage value required by each circuit; the SRAM type FPGA circuit carries out encoding, scrambling, Farrow decimation filtering and digital modulation processing on thereceived external input data and then transmits the data to the high-speed DAC circuit; the high-speed DAC circuit generates an intermediate frequency signal according to a working clock provided by the clock circuit, converts the intermediate frequency signal into an analog signal and sends the analog signal to the intermediate frequency processing circuit; the configuration circuit completes loading, refreshing, control and online reconstruction of the SRAM type FPGA circuit and acquisition and remote control communication of module remote measurement; and the intermediate frequency processing circuit is used for amplifying and filtering the intermediate frequency signal.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular, to an on-board coding and modulation system and method of all-digital modulation. Background technique [0002] The satellite data transmission subsystem is used to complete the transmission function of satellite load data, platform monitoring data and other data to the ground. The data transmission device is used to complete the functions of data transmission baseband data reception, encoding, modulation, etc., and is an important part of the satellite data transmission subsystem. [0003] With the development of technology, satellites need to complete the mission requirements of ground, relay and inter-satellite communication. Under the constraints of power consumption and weight, satellite equipment has higher and higher requirements for functional integration. Therefore, the digital transmission device needs to have the functions of ground-to-ground, relay-to-re...

AI Technical Summary

Problems solved by technology

However, a single product of the existing digital transmission transmitter only has one data transmission function, and can only complete the transmission of a single rate and a single modulation mode, which cannot meet the needs of new tasks

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