电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2009年
8期
76-78
,共3页
张春水%张佳培%李文达%程文
張春水%張佳培%李文達%程文
장춘수%장가배%리문체%정문
C8051%频谱分析%FPGA%快速傅里叶变换(FFT)
C8051%頻譜分析%FPGA%快速傅裏葉變換(FFT)
C8051%빈보분석%FPGA%쾌속부리협변환(FFT)
C8051%frequency spectrum analyzer%FPGA%Fast Fourier Transform(FFT)
观测信号频谱在科研中具有重大意义.在教学实验中也有利于学生更直观深入地了解信号特征.采用单片机C8051和FPGA.外加高速A/D转换器设计一种简易的频谱分析仪.该系统主要包括信号采集、频谱搬移、数字滤波、数字FFT和LCD显示.经测试.该系统能够分析信号带宽为0～5 MHz,最低分辨率达到1 Hz.而且信号频谱图能够很好地显示在LCD上.整个系统工作稳定,操作方便,且成本比其他频谱分析仪低很多.
觀測信號頻譜在科研中具有重大意義.在教學實驗中也有利于學生更直觀深入地瞭解信號特徵.採用單片機C8051和FPGA.外加高速A/D轉換器設計一種簡易的頻譜分析儀.該繫統主要包括信號採集、頻譜搬移、數字濾波、數字FFT和LCD顯示.經測試.該繫統能夠分析信號帶寬為0～5 MHz,最低分辨率達到1 Hz.而且信號頻譜圖能夠很好地顯示在LCD上.整箇繫統工作穩定,操作方便,且成本比其他頻譜分析儀低很多.
관측신호빈보재과연중구유중대의의.재교학실험중야유리우학생경직관심입지료해신호특정.채용단편궤C8051화FPGA.외가고속A/D전환기설계일충간역적빈보분석의.해계통주요포괄신호채집、빈보반이、수자려파、수자FFT화LCD현시.경측시.해계통능구분석신호대관위0～5 MHz,최저분변솔체도1 Hz.이차신호빈보도능구흔호지현시재LCD상.정개계통공작은정,조작방편,차성본비기타빈보분석의저흔다.
In the modem science research,it's very important to observe the frequency spectrum of signal and it's helpful for the student to comprehend the signal character directly and in-depth in the experiment class.A simple frequency spectrum analyzer uses C8051 single chip processor and FPGA,as well as high speed A/D converters.The system includes signal acquisition,linear signal frequency shift,digital filtering,FFT and LCD display. The experimental results show the system analyzes signals with the bandwidth from 0MHz to 5MHz and the minimum resolution up to 1 Hz.Besides,the chart of the signal frequency spectrum is well displayed on the LCD.The whole system works steadily and operates expediently and the system's cost is much lower than others.
