Sign in
Search blogs
Articles by category
Ads
Our Bloggers
See Also
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.
Would you like to be notified by email when Rick Lyons publishes a new blog?
RSS FeedA Quadrature Signals Tutorial: Complex, But Not Complicated
Click Here for a PDF version of this article Introduction Quadrature signals are based on the notion of complex numbers and perhaps no other topic causes more heartache for newcomers to DSP than th...
posted by Rick Lyons on Apr 12 2013 under Basics | Communication | Tutorial Comments (3) |
Beat Notes: An Interesting Observation
Some weeks ago a friend of mine, a long time radio engineer as well as a piano player, called and asked me, "When I travel in a DC-9 aircraft, and I sit back near the engines, I hear this fairly lo...
posted by Rick Lyons on Mar 13 2013 under Audio DSP Comments (6) |
Using 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) |
The Little Fruit Market
There used to be a fruit market located at 391 San Antonio Road in Mountain View, California. In the 1990's I worked part time in Mountain View and drove past this market's building, shown in Figure...
posted by Rick Lyons on Jan 14 2013 Comments (5) |
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) |
Understanding the 'Phasing Method' of Single Sideband Demodulation
Download the pdf version There are four ways to demodulate a transmitted single sideband (SSB) signal. Those four methods are: synchronous detection, phasing method, Weaver method, and filter...
posted by Rick Lyons on Aug 8 2012 under Communication Comments (6) |
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) |
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) |