FPGA Design And Implementation Of Multi-channel Recording And Playback System Based On Fiber Access

With the rapid development of modern communication technology,there is a growing demand for high-speed data transmission in both military and civil fields.Also in the field of radar,the data bandwidth and data volume generated by modern radar are very large,which has a very high demand for high-speed data transmission technology.In the radar system,it is necessary to analyze and verify the radar data,especially the high-speed recording and playback equipment which can record and amplify the bandwidth data for a long time and with stable performance.In order to meet this demand,and to better adapt to the application of high-speed data recording and playback equipment in different scenarios,this paper adopts the mode of optical fiber + FPGA logic control + DDR3 storage + PCIe bus to build a multi-channel recording and playback system based on optical fiber access,large capacity cache and high-speed data transmission.Based on the above design ideas,this paper mainly completes the following parts: firstly,this paper describes the research background,research significance and current research status at home and abroad of multichannel recording and playback system based on fiber access;then,combined with the specific requirements and performance indicators of the system,the scheme of multichannel recording and playback system based on fiber access is carried out detailed discussion and explanation;at the same time,according to the framework of fiber + FPGA + DDR3 + PCIe,the software design and hardware design of the system are mainly described;finally,according to the requirements of the system,a detailed implementation scheme is developed.In terms of hardware design,the virtex-7 series FPGA of Xilinx company is used as the main control chip in the project for function development.In terms of software design,the system functions are modularized with the design methodology of FPGA itself,including high-speed serial transceiver module,DDR3 storage module,PCIe data transmission and command interaction module And debug on FPGA to achieve the predetermined function.Finally,the functions of fibre channel selection,fibre line rate selection,recording and playback are realized on the multichannel recording and playback system based on fibre access.The design of the whole system has the following characteristics: firstly,the whole system is based on the axi4 bus,which greatly speeds up the debugging progress of the system,shortens the development cycle,and facilitates the maintenance and secondary upgrade of the system;secondly,the system integrates the recording function and playback function on the same hardware board,and the function switching between them can be set by the upper computer;thirdly,the system It includes 192 channels of fibre channel,and supports any choice of 192 channels of fibre channel,and also supports any choice of three fiber line rates,which is very practical.Finally,the performance of the whole system is very outstanding.When four FPGA chips work at the same time,the maximum speed of recording and playback can reach more than 15 GB / s,which is very functional in practical application.This system uses the software development platform vivado of Xilinx company to develop the system functions,and uses the logic analyzer integrated in vivado to observe the relevant signals.Finally,the test results show that the multichannel recording and playback system based on optical fiber access fully meets the requirements of the expected system.