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RSS FeedSetting 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) |
'z' as in 'Zorro': Frequency Masking FIR
An efficient way to implement FIR filters. Matlab / Octave example included. Keywords: Frequency masking FIR filter implementation Introduction An "upsampled" FIR filter uses multiple-sample delays ... 
posted by Markus Nentwig on Oct 2 2012 under Matlab | Design Methodolgies | Multirate DSP Comments (0) |
Do you like the new Comments System?
I have just finished implementing a new comments system for the blogs. Do you like it? Please share your thoughts with me by adding a comment. I'll wait a few days and make sure it works pro... 
posted by Stephane Boucher on Sep 19 2012 under DSPRelated Comments (4) |
FIR sideways (interpolator polyphase decomposition)
An efficient implementation of a symmetric-FIR polyphase 1:3 interpolator that doesn't follow the usual tapped delay line-paradigm. The example exploits the impulse response symmetry and avoids four ...
posted by Markus Nentwig on Sep 12 2012 under Matlab | Basics | Multirate DSP Comments (9) |
Design of an anti-aliasing filter for a DAC
Overview Octaveforge / Matlab design script. Download: here weighted numerical optimization of Laplace-domain transfer function linear-phase design, optimizes vector error (magnitude and phase) ...
posted by Markus Nentwig on Aug 18 2012 under Matlab | Basics | Wireless Comments (0) |
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) |
Frequency-Domain Periodicity and the Discrete Fourier Transform
Introduction Some of the better understood aspects of time-sampled systems are the limitations and requirements imposed by the Nyquist sampling theorem [1]. Somewhat less understood is the periodic... 
posted by Eric Jacobsen on Aug 6 2012 under DFT_FFT Comments (0) |
Time-Domain Periodicity and the Discrete Fourier Transform
Introduction The Discrete Fourier Transform (DFT) and it's fast-algorithm implementation, the Fast Fourier Transform (FFT), are fundamental tools for processing and analysis of digital signals. Whi...
posted by Eric Jacobsen on Jul 13 2012 under DFT_FFT Comments (0) |
Python scipy.signal IIR Filter Design Cont.
In the previous post the Python scipy.signal iirdesign function was disected. We reviewed the basics of filter specification and reviewed how to use the iirdesign function to design IIR filter... 
posted by Christopher Felton on Jun 19 2012 under Basics | Python Comments (7) |
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) |