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Tips and Tricks - DSP Blog
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RSS FeedUsing the DFT as a Filter: Correcting a Misconception
This article is also available in pdf format. I have read, in some of the literature of DSP, that when the discrete Fourier transform (DFT) is used as a filter the process of performing a DFT cause...
posted by Rick Lyons on Feb 18 2013 under Tips and Tricks Comments (12) |
Coupled-Form 2nd-Order IIR Resonators: A Contradiction Resolved
This blog clarifies how to obtain and interpret the z-domain transfer function of the coupled-form 2nd-order IIR resonator. The coupled-form 2nd-order IIR resonator was developed to overcome a short...
posted by Rick Lyons on Nov 23 2012 under Tips and Tricks Comments (2) |
Setting the 3-dB Cutoff Frequency of an Exponential Averager
This blog discusses two ways to determine an exponential averager's weighting factor so that the averager has a given 3-dB cutoff frequency. Here we assume the reader is familiar with exponential av...
posted by Rick Lyons on Oct 22 2012 under Tips and Tricks Comments (5) |
TCP/IP interface (Matlab/Octave)
Communicate with measurement instruments via Ethernet (no-toolbox-Matlab or Octave) Purpose Measurement automation is digital signal processing in a wider sense: Getting a digital signal from an ana... 
posted by Markus Nentwig on Jun 17 2012 under Matlab | Tips and Tricks Comments (4) |
How Discrete Signal Interpolation Improves D/A Conversion
This blog post is also available in pdf format. Download here. Earlier this year, for the Linear Audio magazine, published in the Netherlands whose subscribers are technically-skilled hi-fi audio e...
posted by Rick Lyons on May 28 2012 under Tips and Tricks Comments (0) |
How Not to Reduce DFT Leakage
This blog describes a technique to reduce the effects of spectral leakage when using the discrete Fourier transform (DFT). In late April 2012 there was a thread on the comp.dsp newsgroup discussing...
posted by Rick Lyons on May 23 2012 under Tips and Tricks Comments (11) |
Instant CIC
Summary: A floating point model for a CIC decimator, including the frequency response. Description: A CIC filter relies on a peculiarity of its fixed-point implementation: Normal operation involves...
posted by Markus Nentwig on May 8 2012 under Matlab | Basics | Tips and Tricks Comments (3) |
Accurate Measurement of a Sinusoid's Peak Amplitude Based on FFT Data
There are two code snippets associated with this blog post: Flat-Top Windowing Function for the Accurate Measurement of a Sinusoid's Peak Amplitude Based on FFT Data and Testing the Flat-Top Wind...
posted by Rick Lyons on Dec 14 2011 under Tips and Tricks Comments (6) |
Impulse Response Approximation
Recently, I stumbled upon a stepped-triangular (ST) approximation that can be implemented as a cascade of recursive running sum (RRS) filters. The following is a short introduction to the steppe... 
posted by Christopher Felton on Aug 5 2011 under Tips and Tricks Comments (3) |
Multiplying Two Binary Numbers
I just encountered what I think is an interesting technique for multiplying two integer numbers. Perhaps some of the readers here will also find it interesting. Here's the technique: assume we want...
posted by Rick Lyons on Mar 16 2011 under Tips and Tricks Comments (6) |
