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Signal Processing : Recent Questions and Answers (Page 4)

Find answers to your questions about Signal Processing or help others by answering their Signal Processing questions.

What is the difference between the PSD of a deterministic and stochastic signal?

I am learning about stochastic processes and I don't get one thing:What is the advantage of calculating the PSD of a signal using the Wiener-Khinchin theorem $Phi(omega) =mathcal{F}{R_{xx}}$ and calculating...

Asked on 11/30/2021 by user2796729

2 answer

Sum of correlated exponential random variables

How do we find PDF of sum of correlated exponential random variables. I know for independent random variables. But how to find it for correlated exponential random variables....

Asked on 11/30/2021

1 answer

Possible to get transfer function coefficients from window?

I am hoping to use scipy.signals.filtfilt() to smooth some signals in Python, and wanted to build the filter based on a window like a hanning window or whatever. E.g.:...

Asked on 11/30/2021

1 answer

Is real-time signal processing possible under Windows?

This question is related to on How to decide what platform is best to implement real-time audio processing on?, but focusing on Windows. I'd like to be able...

Asked on 11/28/2021

4 answer

How to calculate DTFT of cosine function divided by n

I'm having a hard time to calculate the next function, and I don't really know Matlab good enough to calculate it there.Help would be appreciated: $$h[n]=frac{A_1 cos⁡[theta_1(n-N/2)]}{n-N/2}$$...

Asked on 11/28/2021 by Jhon Margalit

1 answer

Understanding MFCC

I am not from electrical or electronic background so my knowledge will be lacking. MFCC is represented by 39 values for each window frame. 12 values are the mel filter-bank...

Asked on 11/28/2021 by Naveen Gabriel

0 answer

How to determine the original size of the FFT used in unknown OFDM symbol

Given an unknown OFDM symbol consisting of 9144 samples, interested to know the size of the FFT used in the TX/Number of bins. Down-sampling to 512,256,128,64,32 yields the following....

Asked on 11/25/2021 by SenSen

3 answer

Fourier transform of a damped cosine wave with a linear frequency chirp

I want to take the Fourier transform of the following transient signal,$$f(t) = e^{-t/tau} cos((omega_0 + m t)t)$$, where $m$ is some gradient parameter in units of...

Asked on 11/25/2021

1 answer

How well can discrete wavelet packet transform reduce noises that are similar to the input signal in the same frequency band?

If I had 50Hz noise coming from power line, and signals in the same frequency range (EEG for example 0.1Hz to 100Hz). If my sampling frequency is 30kHz but I...

Asked on 11/25/2021

0 answer

Does the FFT size matter in OFDM demodulation?

The DFT size in OFDM demodulation is usually matched to the DFT size in the modulation process. This makes modulation/demodulation simple where each FFT bin (i.e., sample) represents one symbol....

Asked on 11/25/2021

1 answer

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