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Python scipy.signal IIR Filtering: An Example
Introduction In the last posts I reviewed how to use the Python scipy.signal package to design digital infinite impulse response (IIR) filters, specifically, using the iir...
posted by Christopher Felton on May 19 2013 under Audio DSP | FPGA | Basics | Tips and Tricks | Python Comments (0) |
A 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) |
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 (1) |
Handling Spectral Inversion in Baseband Processing
The problem of "spectral inversion" comes up fairly frequently in the context of signal processing for communication systems. In short, "spectral inversion" is the reversal of the ... 
posted by Eric Jacobsen on Feb 11 2008 under Tips and Tricks | Wireless | Communication Comments (4) |
A Fixed-Point Introduction by Example
Fixed-point is used to represent fractional numbers of finite-word length. Fixed-point is an interpretation of a 2's compliment number usually signed but not limited to sign representation. &nbs...
posted by Christopher Felton on Apr 25 2011 under FPGA | Basics Comments (12) |
An Interesting Fourier Transform - 1/f Noise
Power law functions are common in science and engineering. A surprising property is that the Fourier transform of a power law is also a power law. But this is only the start- there are many interest... 
posted by Steve Smith on Nov 23 2007 under Academia / Research Comments (9) |
Python scipy.signal IIR Filter Design
Introduction The following is an introduction on how to design an infinite impulse response (IIR) filters using the Python scipy.signal package. This post, mainly, covers how to use the scipy...
posted by Christopher Felton on May 13 2012 under Basics | Python Comments (3) |
Polyphase filter / Farrows interpolation
Hello, this article is meant to give a quick overview over polyphase filtering and Farrows interpolation. A good reference with more depth is for example Fred Harris' paper: http://www.signumconce... 
posted by Markus Nentwig on Sep 18 2007 under Basics Comments (11) |
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) |
Computing the Group Delay of a Filter
I just learned a new method (new to me at least) for computing the group delay of digital filters. In the event this process turns out to be interesting to my readers, this blog describes the method...
posted by Rick Lyons on Nov 19 2008 under Tips and Tricks Comments (8) |