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Sharmin Kibria

MathWorks

Last seen: 2 months ago |  Active since 2021

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I am working as a Signal Processing Engineer at MathWorks. My areas of interest are signal processing and wavelets.

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How to decompose more than one signal simultaneously in Signal Multiresolution Analyzer app and Wavelet Signal Analyzer app？
Hi, Wavelet Signal Analyzer only supports importing one signal at a time. Currently, we do not support multi-channel input for ...

1 year ago | 0

Answered
Liftscheme Integer 2 Integer Method
Hi Dylan, Thanks for reaching out. You can create the lifiting scheme using the following command: liftscheme = liftingScheme...

1 year ago | 0

Answered
Why does the variance not coincide with the autocorrelation function in 0?
var(x) = sum((x-mean(x)).^2)/1000 while y(lags==0) is just calculating sum(x.^2). Because of the normalization var does your res...

1 year ago | 0

Answered
How to calculate energy of each audio signal(dataset) decomposed using emprical wavelet transform and use the signal with most highest energy for further feature extraction
You can use ewt function in wavelet toolbox to calculate the signal projection at different frequency band. https://www.mathwor...

1 year ago | 0

Answered
Undefined function 'symsum' for input arguments of type 'double'. for terahert band system model
Hi, If you are calling symsum with two inputs, the first input has to be a symbolic expression. As you are entering signal_bw a...

3 years ago | 0

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Reduce computational time for nested for loops
Hi, You can definitely speed up the process by vectorization. https://www.mathworks.com/help/matlab/matlab_prog/vectorization...

3 years ago | 0

| accepted

Answered
Compute the Fourier Transform for: x(n)=u(n)-u(n-6); x(n)=[(2^n)*u]*(-n); x(n)=[-2,-1,0,1,2]
Hello, I believe you are trying to calculate the Fourier Transform of the three signals. x[n] = u[n]-u[n-6] = 1, n = 0,1,...5,...

3 years ago | 0