System and method for on-board coding and modulation of all-digital modulation

Abstract

The present invention provides an all-digital modulated on-board coded modulation system and method, the system comprising: a power conversion circuit, a high-speed interface circuit, a clock circuit, a configuration circuit, an SRAM FPGA circuit, a high-speed DAC circuit and an intermediate frequency processing circuit; The conversion circuit is used to convert the external input power supply voltage into the voltage value required by each circuit; the SRAM type FPGA circuit encodes, scrambles, Farrow extracts and filters, and digitally modulates the received external input data, and then transmits it to the high-speed DAC circuit ;The high-speed DAC circuit generates an intermediate frequency signal according to the working clock provided by the clock circuit, and converts the intermediate frequency signal into an analog signal and sends it to the intermediate frequency processing circuit; the configuration circuit completes the loading, refreshing, control, online reconstruction and on-line reconfiguration of the SRAM FPGA circuit The collection of module telemetry and remote control communication; the intermediate frequency processing circuit is used to amplify and filter 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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