Skip to main content
The 2024 Developer Survey results are live! See the results

New answers tagged

0 votes

How to relate a section of a PSD plot back to the original complex numbers IQ or remove part of a signal from a spectrum with python-signal excision?

A simple approach would be to take the FFT, excise the offending bins and convert back to the time domain, but this results in more distortion (and more delay and more processing) than other direct ...
Dan Boschen's user avatar
0 votes
Accepted

For a symmetric FIR filter, can the number of coefficients be even and half of the filter order?

This function specifies symmetric filters, so only supplying half the coefficients makes sense to me – the other half is the same coefficients, "mirrored". This implies that these filters ...
Marcus Müller's user avatar
1 vote
Accepted

Can a physical system/ filter be minimum phase?

Yes and no. That's a bit of a philosophical question: all mathematical models we make of the physical world are approximate in nature. You choose the model that's a good balance between complexity and ...
Hilmar's user avatar
  • 46.4k
0 votes
Accepted

Track data using a digital elevation model (DEM) shows bridges and tunnels as "outliers"

Sounds like a job for a median filter-based anomaly detector followed by linear interpolation: essentially, you slide a "window" of some defined length (widest bridge) over your signal, ...
Marcus Müller's user avatar
1 vote

How to apply FFT on audio in chunks without introducing distortion?

I have always tried to avoid Java primarily because of the JVM and definitely for signal processing applications. FFTW is the fastest non-GPU FFT library I know of, but you'll have to rewrite your ...
Michael Blazej's user avatar
1 vote
Accepted

Apply Walsh Hadamard Transform (WHT) on Image Patches of Odd Size

The relevant section in the paper is given by: They use the method in the paper (Which is referenced as [6]): Computing Nearest Neighbor Fields via Propagation ...
Royi's user avatar
  • 20.1k
0 votes

System instability when using FIR filter in feedback loop for removing targets in FMCW radar return

Your problem is that you have a multiple input multiple output system which couples the elements of your sweep, thus we indeed expect the edge effects of your zero-phase digital FIR filter to work ...
Stephen's user avatar
  • 1,118
1 vote

System instability when using FIR filter in feedback loop for removing targets in FMCW radar return

As I proposed in the comments, implementing a sensitivity-time-control (STC) scheme might suit you better if your hardware can handle it. Let's assume two identical targets at different ranges. We ...
Envidia's user avatar
  • 2,631
2 votes
Accepted

Running average works with DF-I but not with DF-II

My best guess is that DF-II assumes time-invariance... is this guess correct? Yes. The filter you are implemented is time variant and hence is NOT an LTI (linear time invariant) system. The different ...
Hilmar's user avatar
  • 46.4k
3 votes

System instability when using FIR filter in feedback loop for removing targets in FMCW radar return

FIR filters are typically a bad idea to include in the feedback of a control loop, unless the system is significantly oversampled such that the delay of the filter is insignificant. If an additional ...
Dan Boschen's user avatar

Top 50 recent answers are included