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Rick Lyons's DSP Blog
Richard (Rick) Lyons is a consulting Systems Engineer and lecturer with Besser Associates in Mountain View, California. He is the author of "Understanding Digital Signal Processing 2/E" (Prentice-Hall, 2004), and Editor of, and contributor to, "Streamlining Digital Signal Processing, A Tricks of the Trade Guidebook" (IEEE Press/Wiley, 2007). He is also an Associate Editor for the IEEE Signal Processing Magazine.
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The History of CIC Filters: The Untold Story
If you have ever studied or designed a cascaded integrator-comb (CIC) lowpass filter then surely you've read Eugene Hogenauer's seminal 1981 IEEE paper where he first introduced the CIC filter to th...
posted by Rick Lyons on Feb 20 2012 under Multirate DSP Comments (2) |
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) |
Generating Complex Baseband and Analytic Bandpass Signals
This article is also available in PDF format There are so many different time- and frequency-domain methods for generating complex baseband and analytic bandpass signals that I had trouble keeping ...
posted by Rick Lyons on Nov 2 2011 Comments (0) |
Orfanidis Textbooks are Available Online
I have just learned that Sophocles J. Orfanidis, the well-known professor with the ECE Department of Rutgers University, has made two of his signal processing textbooks available for downloading on th...
posted by Rick Lyons on Jul 12 2011 under DSP on the Web Comments (0) |
Do Multirate Systems Have Transfer Functions?
The following text describes why I ask the strange question in the title of this blog. Some months ago I was asked to review a article manuscript, for possible publication in a signal processing jou...
posted by Rick Lyons on May 30 2011 under Multirate DSP Comments (2) |
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) |
"Neat" Rectangular to Polar Conversion Algorithm
The subject of finding algorithms that estimate the magnitude of a complex number, without having to perform one of those pesky square root operations, has been discussed many times in the past on t...
posted by Rick Lyons on Nov 15 2010 under Tips and Tricks Comments (5) |
Improved Narrowband Lowpass IIR Filters
Here's a neat IIR filter trick. It's excerpted from the "DSP Tricks" chapter of the new 3rd edition of my book "Understanding Digital Signal Processing". Perhaps this trick will be of some value to ...
posted by Rick Lyons on Nov 6 2010 under Tips and Tricks Comments (1) |
Computing FFT Twiddle Factors
Some days ago I read a post on the comp.dsp newsgroup and, if I understood the poster's words, it seemed that the poster would benefit from knowing how to compute the twiddle factors of a radix-2 fa...
posted by Rick Lyons on Aug 7 2010 under Tips and Tricks Comments (0) |
A Stable Goertzel Algorithm
This blog presents a guaranteed-stable Goertzel algorithm. To appreciate what the phrase "guaranteed-stable" means, let's review a few characteristics of the traditional Goertzel algorithm. Goertze...
posted by Rick Lyons on Jun 7 2010 under Tips and Tricks Comments (2) |