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Welcome to DSPRelated.com !

DSPRelated.com has been around since 1999 and has become over the years the most popular independent internet resource for Digital Signal Processing (DSP) engineers around the world.
You are invited to create an account with us (quick and free). Doing so will allow you to contribute to the the site by rating DSP books and DSP Internet resources, as well as participate to one or many DSP related discussion(s).

Most Popular DSP Code Snippets

Saving a Matlab figure to file using command-line
by |
Once again, this is another example that Matlab does weird things with its figure window.  If y...

Computing FFT Twiddle Factors
by Rick Lyons |
This text, figures, and code snippet are also available in downloadable PDF format Typical applic...

Adding a Controlled Amount of Noise to a Noise-Free Signal
by Rick Lyons |
The following gives two snippets of Matlab code. The first snippet is a function whose inputs are: (...

Discrete Haar Wavelet Transform
by |
See article at http://www.dsprelated.com/showabstract/3639.php for the theory....

Zero Crossing Counter
by |
In some DSP applications, it can be very helpful to know how many times your signal has crossed the ...

Fitting Filters to Measured Amplitude Response Data Using invfreqz in Matlab
by Julius Orion Smith III |
In the 1980s I wrote the matlab function invfreqz that implements a fast (FFT-based) equation-error ...

Echo Filter
by Miguel De Jesus |
An Audio Echo Filter is an FIR filter that repeats a sound after a given Delay attenuating the repet...

Halfband Filter Design with Python/Scipy
by Christopher Felton |
The following code snippet is an example how to design a half band filter.  Half band filters a...

Generate ideal QPSK..64QAM symbol error rates (reference result)
by Markus Nentwig |
Calculates the symbol error rate of QPSK/16QAM/64QAM/256QAM/1024QAM modulation for additive white Ga...

Computing the Nth Roots of a Number
by Rick Lyons |
In Matlab when we want to compute the square root of a number we use the 'sqrt()' command. For exa...

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DSP Discussion Groups

software anti-aliasing filter.
by in Comp.DSP on Sep 17 2014
Hey guys, I designed a system to acquire certain physiological signals and recorded t= hese sign... software anti-aliasing filter.

jargon
by RichD in Comp.DSP on Sep 17 2014
I know there are some good mathematicians here, and I don't know where else to post these question... jargon

Principle or Principal? That is the Question.
by in Comp.DSP on Sep 17 2014
This is not a criticism directed at anybody here. I have been known to use = the wrong word occasio... Principle or Principal? That is the Question.

Maximum data extraction from autocorrelation
by Dirk Bruere at NeoPax in Comp.DSP on Sep 17 2014
So, I have a 1024 data set containing a signal and it's reflection. The sig= nal and reflections ar... Maximum data extraction from autocorrelation

Accuracy of frequency determination from FFT on ADC samples
by Dirk Bruere at NeoPax in Comp.DSP on Sep 16 2014
In practice, I have an approximate frequency of 125kHz that I need to measure accurately. Since I am... Accuracy of frequency determination from FFT on ADC samples

Weighted overlap add question
by sed_y in Comp.DSP on Sep 15 2014
Weighed overlap add Filterbank structure is often used in speech coding. (https://www.onsemi.com/si... Weighted overlap add question

Bessel filter: What am I doing wrong?
by Peter Mairhofer in Comp.DSP on Sep 13 2014
Hi, A bessel filter should have nearly constant group delay up to a certain frequency. In my cas... Bessel filter: What am I doing wrong?

A simple algebra quiz problem
by Rick Lyons in Comp.DSP on Sep 10 2014
Hi Guys, I was attempting to derive an equation for the frequency response of a digital filte... A simple algebra quiz problem

More experimentation with single photo 2D -> 3D & other inverse problems in 1D/2D/3D DSP. YouTube demos.
by in Comp.DSP on Sep 9 2014
This is really meant as the latest in a series I posted over irregular inte= rvals since last summe... More experimentation with single photo 2D -> 3D & other inverse problems in 1D/2D/3D DSP. YouTube demos.

Modeling Issues (difference equation to Laplace)
by Modeling in Comp.DSP on Sep 9 2014
First off, Hello all. I am new here. I have been working on a project for some time and have came ... Modeling Issues (difference equation to Laplace)

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