现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
13期
53-56
,共4页
谱分析%误差分析%DFT%Matlab
譜分析%誤差分析%DFT%Matlab
보분석%오차분석%DFT%Matlab
spectrum analysis%analysis error%DFT%Matlab
谱分析是数字信号处理中的一个重要问题，初学者普遍对连续信号谱分析理解不深，尤其是在误差分析时缺乏统一示例，更容易产生困惑。介绍了用离散傅里叶变换（DFT）对连续信号进行谱分析的过程，并详细说明了误差产生的原因和减小误差的方法。而且通过对模拟信号谱分析的实例全面说明了各项误差的影响及解决方案，并应用Matlab直观地进行了分析和对比验证。
譜分析是數字信號處理中的一箇重要問題，初學者普遍對連續信號譜分析理解不深，尤其是在誤差分析時缺乏統一示例，更容易產生睏惑。介紹瞭用離散傅裏葉變換（DFT）對連續信號進行譜分析的過程，併詳細說明瞭誤差產生的原因和減小誤差的方法。而且通過對模擬信號譜分析的實例全麵說明瞭各項誤差的影響及解決方案，併應用Matlab直觀地進行瞭分析和對比驗證。
보분석시수자신호처리중적일개중요문제，초학자보편대련속신호보분석리해불심，우기시재오차분석시결핍통일시례，경용역산생곤혹。개소료용리산부리협변환（DFT）대련속신호진행보분석적과정，병상세설명료오차산생적원인화감소오차적방법。이차통과대모의신호보분석적실례전면설명료각항오차적영향급해결방안，병응용Matlab직관지진행료분석화대비험증。
Spectrum analysis is one of the important missions in digital signal processing. The understanding of most begin-ners is not deep to continuous signal spectrum analysis,especially lacking of a uniform example in the error analysis,so it is easier to be confused. The process of continuous time signal spectrum analysis using the discrete Fourier transform(DFT)is in-troduced in this paper. The reasons of generating the errors and the methods of minimizing the errors are illustrated in detail. The influence and solutions of various errors are elaborated through a concrete example of analog signal spectrum analysis. It is verified intuitively through analysis and contrast with Matlab software.
