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Basics - DSP Blog

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Correlation without pre-whitening is often misleading

White Lies Correlation, as one of the first tools DSP users add to their tool box, can automate locating a known signal within a second (usually larger) signal. The expected result of a correlation i...

posted by Peter Kootsookos on Feb 18 2008 under Matlab | Basics | Tips and Tricks 
Comments (5) |

Understanding Radio Frequency Distortion

Overview The topic of this article are the effects of radio frequency distortions on a baseband signal, and how to model them at baseband. Typical applications are use as a simulation model or i...

posted by Markus Nentwig on Sep 26 2010 under Basics | Wireless | Communication 
Comments (0) |

Discrete Wavelet Transform Filter Bank Implementation (part 1)

UPDATE: Added graphs and code to explain the frequency division of the branches The focus of this article is to briefly explain an implementation of this transform and several filter bank forms. Th...

posted by David Valencia on Oct 27 2010 under Matlab | Basics | Academia / Research | Tips and Tricks | Multirate DSP | wavelet 
Comments (0) |

Matlab Programming Contest

Every 6 months Mathworks hosts an online Matlab programming contest.  If you love or hate Matlab check out the contest.  The group does a really good job putting together the puzzles.  ...

posted by Christopher Felton on Nov 10 2010 under Matlab | Basics 
Comments (0) |

Hidden Linear Algebra in DSP

Linear algebra (LA) is usually thought of as a blunt theoretical subject. However, LA is found hidden in many DSP algorithms used widely in practice. An obvious clue in finding LA in DSP is the linea...

posted by Sami Al Dalahmah on Jun 17 2010 under Basics | Academia / Research | Tips and Tricks 
Comments (4) |

Instantaneous Frequency Measurement

I would like to talk about the oft used method of measuring the carrier frequency in the world of Signal Collection and Characterization world. It is an elegant technique because of its simplicity. Bu...

posted by Parth Vakil on Feb 4 2008 under Matlab | FPGA | Basics 
Comments (18) |

State Space Representation and the State of Engineering Thinking

Most, if not all, textbooks in signal processing (SP) thoroughly covers the frequency analysis of signals and systems alike, including the Fourier and the Z-transform that produce the well known Trans...

posted by Sami Al Dalahmah on Nov 23 2010 under Basics | Academia / Research 
Comments (2) |

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) |

Discrete Wavelet Transform Filter Bank Implementation (part 2)

Following the previous blog entry: http://www.dsprelated.com/showarticle/115.php Difference between DWT and DWPT Before getting to the equivalent filter obtention, I first want to talk about the dif...

posted by David Valencia on Dec 5 2010 under Matlab | Basics | Academia / Research | wavelet 
Comments (5) |

Python number crunching faster? Part I

Everyone has their favorite computing platform, regardless if it is Matlab, Octave, Scilab, Mathematica, Mathcad, etc.  I have been using Python and the common numerical and scientific packages a...

posted by Christopher Felton on Sep 17 2011 under Matlab | Basics | DSP on the Web | Python 
Comments (4) |
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