User Maximilian Matthé

16 votes

Accepted

Which image filter can be applied to remove gridded pattern from corrupt jpegs?

answered Jan 3, 2017 at 22:32

14 votes

Accepted

Which order to perform downsampling and filtering?

bandpass downsampling eeg

answered Dec 20, 2016 at 13:52

10 votes

Accepted

Flat fading criterion of OFDM subcarrier spacing

ofdm delay fading-channel

answered Apr 12, 2017 at 6:48

7 votes

Whittaker-Shannon ($\mathrm{sinc}$) interpolation for a finite number of samples

interpolation dirichlet-kernel

answered Mar 11, 2017 at 23:09

7 votes

What does correcting IQ do?

sdr

answered May 4, 2017 at 4:48

7 votes

Accepted

Can you decimate / downsample a signal in frequency domain just like you can interpolate / upsample it?

matlab discrete-signals fourier-transform interpolation decimation

answered Dec 14, 2016 at 15:27

6 votes

Why do SDR receivers emit I/Q samples?

modulation quadrature sdr

answered Feb 15, 2017 at 9:09

6 votes

Accepted

Delayed impulse does not delay spectral response

fft frequency-spectrum convolution impulse-response

answered Mar 6, 2017 at 6:54

6 votes

How do you interpret FFT of an FFT of a discrete signal?

fft

answered Apr 12, 2017 at 7:53

6 votes

Average bit error and symbol energy

digital-communications modulation digital

answered Apr 5, 2017 at 6:34

5 votes

Interpretation of Clarke's Doppler power spectral density

power-spectral-density doppler

answered Apr 3, 2017 at 12:11

5 votes

Accepted

How to implement the $\tt conv(x,h)$ in MATLAB without using loop?

matlab convolution deconvolution

answered Mar 13, 2017 at 11:28

5 votes

Accepted

How does MATLAB recover picture from magnitude spectrum alone?

image-processing matlab fourier-transform ifft 2d

answered Dec 20, 2017 at 13:32

5 votes

Accepted

Confusion in N of N-point-FFT

fft fourier-transform

answered Feb 27, 2017 at 7:13

5 votes

Accepted

Variance of correlated noise

noise statistics

answered Jan 4, 2017 at 16:01

4 votes

Coherent Sampling And The Distribution Of Quantization Noise

fourier-transform noise sampling dft

answered Jan 2, 2017 at 12:48

4 votes

Accepted

The inverse of an orthogonal matrix is its transpose

matrix orthornormal

answered Jan 17, 2017 at 20:03

4 votes

Accepted

Estimate the wavelength of an oscillatory signal

python power-spectral-density

answered Dec 13, 2016 at 7:59

4 votes

Implementing inverse FFT using forward FFT

fft python ifft

answered Nov 29, 2016 at 5:39

4 votes

Accepted

Low-pass filtering bounces when signal doesn't start at 0

lowpass-filter

answered Dec 5, 2016 at 16:01

4 votes

Accepted

Proper generation of Complex white Gaussian noise using Matlab

matlab noise

answered Dec 6, 2016 at 18:35

4 votes

Accepted

Filtering - multiplication in frequency domain

fft filters frequency-spectrum python

answered Apr 4, 2017 at 15:19

4 votes

Accepted

Confusion regarding pdf of circularly symmetric complex gaussian rv

gaussian self-study complex

answered Apr 18, 2017 at 11:17

4 votes

Effect of windowing on noise

fourier-transform noise window-functions

answered Apr 18, 2017 at 18:35

3 votes

Is ideal LPF a LTI system? And is it time invariant?

filters lowpass-filter linear-systems

answered Mar 29, 2017 at 6:47

3 votes

Accepted

Calculate the signal's average power

power-spectral-density signal-power

answered Mar 28, 2017 at 10:26

3 votes

Why do we need FFT pairs for OFDM?

ofdm

answered Apr 13, 2017 at 4:33

3 votes

Calculate IFFT using only FFT?

ifft

answered Dec 6, 2016 at 14:59

3 votes

Accepted

What is the overall capacity of two cascaded BSC channel?

information-theory

answered Dec 12, 2016 at 17:37

3 votes

Finding the $\mathcal Z$-transform of $((-\frac{1}{3})^n + \frac{1}{2})^n \mu[n-2]$?

z-transform

answered Dec 21, 2016 at 9:39

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205 Answers

Which image filter can be applied to remove gridded pattern from corrupt jpegs?

Which order to perform downsampling and filtering?

Flat fading criterion of OFDM subcarrier spacing

Whittaker-Shannon ($\mathrm{sinc}$) interpolation for a finite number of samples

What does correcting IQ do?

Can you decimate / downsample a signal in frequency domain just like you can interpolate / upsample it?

Why do SDR receivers emit I/Q samples?

Delayed impulse does not delay spectral response

How do you interpret FFT of an FFT of a discrete signal?

Average bit error and symbol energy

Interpretation of Clarke's Doppler power spectral density

How to implement the $\tt conv(x,h)$ in MATLAB without using loop?

How does MATLAB recover picture from magnitude spectrum alone?

Confusion in N of N-point-FFT

Variance of correlated noise

Coherent Sampling And The Distribution Of Quantization Noise

The inverse of an orthogonal matrix is its transpose

Estimate the wavelength of an oscillatory signal

Implementing inverse FFT using forward FFT

Low-pass filtering bounces when signal doesn't start at 0

Proper generation of Complex white Gaussian noise using Matlab

Filtering - multiplication in frequency domain

Confusion regarding pdf of circularly symmetric complex gaussian rv

Effect of windowing on noise

Is ideal LPF a LTI system? And is it time invariant?

Calculate the signal's average power

Why do we need FFT pairs for OFDM?

Calculate IFFT using only FFT?

What is the overall capacity of two cascaded BSC channel?

Finding the $\mathcal Z$-transform of $((-\frac{1}{3})^n + \frac{1}{2})^n \mu[n-2]$?