Analisis perbandingan metode transformasi wavelet diskrit dan filter hilbert diskrit pada denoising sinyal phonocardiogram

Tri, Khaerudin (2020) Analisis perbandingan metode transformasi wavelet diskrit dan filter hilbert diskrit pada denoising sinyal phonocardiogram. Undergraduate Thesis thesis, Institut Teknologi Telkom Purwokerto.

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Abstract

Thecontentofnoiseinthephonocardiogram(PCG)signalisamajorproblemin theanalysisof heartconditions thatgenerallyoccurinthe recordingprocess. The developmentofamethodofeliminatingnoise(denoising)isthegoaloftheresearchthat hasbeenconducted.Observationofsystemperformanceisdoneusingtheadditionof AdditiveWhiteGaussianNoise(AWGN)noise,calculatingtheestimatednoiselevel, threshold,denoisingfortheDiscreteWaveletTransformation(DWT)methodandthe DiscreteHilbertFilter(DHF)methodbyconvolutionofevenandoddDHF.Theresults obtainedusingtheDWTmethodwithoutBandPassFilter(BPF)produceanaverage valueofSignalNoisetoRatio(SNR)of13.90dBandMeanSquareError(MSE)of 0.01%.DWTresultswithBPFproduceanaverageSNRof12.89dBandMSEof0.30%. DHFresultswithoutBPFproduceanaverageSNRof16.54dBandMSEof1.55%.The resultsofDHFwithBPFproduceanaverageSNRvalueof17.30dBandMSEof1.51%. The results obtained show that the denoising process using Wavelet Transform transformsisabletoprovideagooddenominatingPhonocardiogramsignal,compared tousingaDiscreteHilbertFilter. Keywords:Phonocardiogram(PCG),AdditiveWhiteGaussianNoise(AWGN),Discrete WaveletTransformation(DWT),DiscreteHilbertFilter(DHF),SignalNoisetoRatio (SNR),MeanSquareError(MSE).

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