Design And Implementation Of High-speed Signal Transmission System Based On FPGA

The main research content of this paper is the design and verification of the baseband high-speed signal transmission system in the laboratory ultra-high-speed wireless communication system project.At this stage,the demand for information transmission and processing is getting higher and higher,and many wireless communication systems suitable for new applications are also developing faster and faster.Based on the rate increase and high-speed signal transmission,FPGA-based architecture for digital signal processing and data transmission is a direction and subject worthy of research.Its development upper limit is very high,and the basic functions of data transmission can be based on the different needs of different industries.To complete different designs.This thesis first analyzes the system architecture of the project's requirements for receiving and transmitting high-speed data code streams.According to the resources needed for the functions to be realized,FPGA chips,ADC chips,DAC chips and clock chips were selected,and the functions and performance of the hardware were analyzed.Then on the basis of the selected hardware,perform functional verification on the link between the development board and the self-developed board.In the verification part of the development board,the FPGA development board,the ADC development board and the DAC development board were used to implement data transmission based on the JESD204B protocol.The former provides a 10MHz sine wave signal source through the signal source.After the ADC performs analog-to-digital conversion,the data is transmitted to the FPGA based on the JESD204B protocol through the FMC interface.The sine wave signal waveform is obtained through ILA in Vivado to achieve analog-to-digital conversion and data transmission functions..The latter provides a 20MHz digital signal through DDS in Vivado,and is sent from the FPGA chip to the DAC based on the JESD204B protocol through the FMC interface.The DAC is digital-to-analog converted to the corresponding analog signal.The coaxial cable is connected to the spectrum analyzer through the SMA connector.20MHz spectrum,realizing digital-to-analog conversion and data transmission functions.After the self-developed board is developed,the function verification work on the self-developed board is started.Later in the actual application project,FPGA should be used as the main control,and directly read and write other chip register values.Therefore,before implementing the functions on the self-developed board,the engineering rewrite was added to the SPI configuration program to verify the read and write of the DAC\ADC and the clock chip respectively.After the simulation timing is correct,the detection timing on the multi-probe oscilloscope is also correct.The register value required for configuration realizes the corresponding chip function.The timing verification of the LMK04828 chip and the DAC chip has now been completed,and functional verification is in progress.In the later stage,the related verification work of the self-developed board will continue,and in the later stage of the project,digital signal processing functions such as modulation and coding will be added according to specific needs.