摘要
为保证雷达射频信号数据采集及处理系统可靠性,提高数据传输速率,简化系统设计,设计了一款基于国产可编程逻辑门阵列(FPGA)和国产模数转换芯片(ADC)的射频数据采集及处理系统。系统核心器件为国产器件,能实现从雷达射频接收组件接收输入中频信号,在ADC中完成信号下变频、模数转换及数据采集功能;FPGA实现了ADC数据的接收、存储及上传功能。为解决LVDS协议传输数据较慢的问题,采用JESD204B串行传输协议,提高了数据传输速率。以N5166B信号发生器作为系统输入,对本系统进行验证和分析。结果表明:所开发的射频数据采集及处理系统可实现采样精度9位、采样频率400 Mbps/s、数据传输速率4 Gbit/s,提升了整体传输速率,满足功能和性能要求。
In order to ensure the reliability of radar RF signal data acquisition and processing system,improve data transmission rate,and simplify system design,an RF data acquisition and processing system based on domestic programmable logic gate array(FPGA)and domestic analog-to-digital conversion chip(ADC)was designed.The core device of the system is a domestic device that can receive input IF signals from the radar RF receiver assembly,and perform signal down conversion,analog-to-digital conversion and data acquisition functions in ADC;through FPGA,the functions of receiving,storing,and uploading ADC data were realized.In order to solve the problem of slow data transmission in LVDS protocol,JESD204B serial transmission protocol was adopted to improve the data transmission rate.The N5166B signal generator was used as the system input,the verification and analysis of this system were carried out.The results show that the developed RF data acquisition and processing system can realize a sampling accuracy of 9 bits,a sampling frequency of 400 Mbps/s,and a data transmission rate of 4 Gbit/s,by which the overall transmission rate can be improved,and it meets functional and performance requirements.
作者
孙艳萍
李孟
屈文涛
Sun Yanping;Li Meng;Qu Wentao(School of Mechanical Engineering,Xi′an Shiyou University,Xi′an 710065,China)
出处
《机电工程技术》
2023年第4期128-132,共5页
Mechanical & Electrical Engineering Technology
