CHENG-YI LI

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2. In digital signal processing, up-sampling process can actually be done by first insert zeros between signal values then apply a FIR filter to adjust the wave form. This process is shown in Fig. 2

約7年前 | 0 件の回答 | 0

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“Signal1” is shown in Fig. 1 which is composed of a lower (10 Hz) and a higher (216 Hz) frequency elements in the first second. After the first second, the values are all equal zero. The sampling rate is 1000 Hz.

約7年前 | 0 件の回答 | 0

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(a) Please load the audio file ‘PhoneSound.wav’ and plot the audio signal X .(b) Please divide X into 10 segments having equal length (0.5 sec), and plot the power spectral density for each segment
( c) From each plot, you will find two pitches and please tell what number was dialed based on the definitions provided in the ...

約7年前 | 1 件の回答 | 0

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Given a triangle wave T(?) in Fig. 1, the Fourier series representation for the triangle wave is under the Fig.1 below. Where N is the total number of Fourier coefficients used for approximation.
this is my code: t1=[0,0.5,1.5,2]; Tri=[0,1,-1,0]; Tri_approx=? plot(t1,Tri,'k--','Line Width',3); %hold on %plot(t,Tr...

約7年前 | 1 件の回答 | 0

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Use MATLAB built-in function conv() to compute and plot y[n]
my code is: clear all; close all; clc; %first sequence x=[0, 1, 1, 1, 0, 0, 0]; %second sequence h=[1, 2, 4, 8, 16, 32,...

約7年前 | 2 件の回答 | 0

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Draw a Morlet wavelet w(t) with t being set from -0.5 to 0.5 sec
The mother wavelet of Morlet wavelet transform is formed by multiplying a sinusoidal wave with a Gaussian window: cycles = 8 ...

約7年前 | 1 件の回答 | 0

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