數(shù)字信號(hào)處理課程中濾波器線性相位特性教學(xué)實(shí)驗(yàn)研究

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中圖分類號(hào)：TN713；TP39；G434 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：2096-4706（2025）12-0036-05

Experimental Study on Linear Phase Characteristics of Filter in Digital Signal Processing Course

LUO Chenggao， XU Ke， ZENG Yang， YI Jun （CollegeofElectronicScienceandTechnologyNationalUniversityofDefenseTchnology，Changsha4o3，hina）

Abstract：The linear phase characteristics of digital flters have important applications in electronic information systems， andare alsoanimportant knowledge pointinthe undergraduatecourseof“Digital SignalProcessing”.However，inteaching practice，teachersoftenexplain itonlythrough theoreticalanalysisanddrawing phase-frequencycharacteristicfunctions，which leads tostudents'lackof intuitive knowledgeandunderstandingoflinearphasecharacteristicsandtheirengineringaplication background.Inthis paper，ateaching experiment thatfexiblyadjuststhephasecharacteristicsoftheflterisdesignedbyusing thecircularconjugatesymmetrycharacteristicoftheDiscreteFourierTransform.Byintuitivelyfelingtheefectofaudiosignal beforeandafterfiltering，studentscandeepen theirunderstandingofrelevantknowledgepointssuchasfilterdesignintheoretical courses，nd improve theirunderstanding of the importanceoflinear phasecharacteristics in engineringapplications.

Keywords： digital filter; linear phase characteristic; circular conjugate symmetry characteristic; Discrete Fourier [ransform

0 引言

按照相頻響應(yīng)的特性來劃分，數(shù)字濾波器可以被明確地劃分為線性相位和非線性相位兩種類型[1]。（剩余4917字）