摘要
设计了一种基于FPGA的双路低频信号发生及分析系统,实现对低频信号的发生和频域分析。系统采用FPGA为低频信号发生模块和分析模块控制芯片,按键输入信号的参数给FPGA,FPGA通过数字频率合成技术产生频率幅度步进可调的双路低频信号,信号经加法器叠加后,再由信号分析模块FPGA通过快速傅里叶变换对信号进行频域提取,并将频率幅度信息直接用LCD显示,实现了低频信号发生和频谱分析的功能。该系统密闭封装,人机界面友好,非常便于操作演示。
A FPGA-based two-channel low frequency signal generator and analysis system has been designed to generate and analyze the low frequency signal.It uses FPGA for low frequency signal generation module and analysis module.Parameter of the signal in FPGA is send by keyboard.FPGA generates frequency range step adjustable low frequency signal by the technology of DDS.Through the adder,analysis module FPGA extract frequency domain signal by using FFT.The frequency and amplitude and other information can be displayed in LCD,to achieve low frequency signal frequency domain analysis capabilities.The system whose encapsulation is compact has friendly interface and it is very easy to operate and demonstrate.
出处
《电子测量技术》
2013年第2期72-76,共5页
Electronic Measurement Technology
关键词
FPGA
信号发生
快速傅里叶变换
频域分析
FPGA
signal generation
fast Fourier transform
frequency domain analysis
