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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...

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

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 ...

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: (...

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

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...

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...

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...

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DSP Discussion Groups

Linear phase vs Min. Phase
by Max in Comp.DSP on Oct 24 2014
I noticed a post about 'pre-ring' here recently (couldn't find the thread again), and I'm trying to... Linear phase vs Min. Phase

Math History
by Tim Wescott in Comp.DSP on Oct 24 2014
Who was it who figured out that integral 1/(x^2 + 1) = arctan x ? And how long did it take ... Math History

Calculating magnitude of FFT result
by Robd in Comp.DSP on Oct 23 2014
Hi, I hope this is the correct forum for such a question. I am writing some DSP code that runs on... Calculating magnitude of FFT result

Anybody know about sound propagation in water? (sonar)
by in Comp.DSP on Oct 22 2014
If you were to drop a liquid contaminant into the water, would the sound refract due to the differen... Anybody know about sound propagation in water? (sonar)

Interpretting and using FFT outputs
by rwjones in Comp.DSP on Oct 22 2014
Total newbie question... I am working with a data set containing about 150,000 observations of pu... Interpretting and using FFT outputs

linear system linear?
by Peter Mairhofer in Comp.DSP on Oct 20 2014
Supposedly simple questions: Is every "linear system" under all conditions linear? Of course, wha... linear system linear?

ANN: HpW-Works Spectrum Analyzer & Wave Generator V3.4.1
by HpW-Works in Comp.DSP on Oct 19 2014
HpW-Works Version 3.4.1: Supported MS Windows versions: - MS Windows Vista, 32 & 64 bit with... ANN: HpW-Works Spectrum Analyzer & Wave Generator  V3.4.1

Stolen from another group
by in Comp.DSP on Oct 18 2014
Thought you may like it Some scientists are actually attempting to determine whether reality is a... Stolen from another group

Filtering for a Inverter PWM Driver
by Anand P. Paralkar in Comp.DSP on Oct 17 2014
Hi, I am referring to two app. notes from Microchip - 1. PICREF-1 2. AN1279 These ap... Filtering for a Inverter PWM Driver

carrier detection
by Lanarcam in Comp.DSP on Oct 17 2014
I am not an expert in DSP, in fact I know some of the theory but I have never really written a DSP ... carrier detection

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