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Frequency Dependence in Free Space Propagation

IntroductionIt seems to be fairly common knowledge, even among practicing professionals, that the efficiency of propagation of wireless signals is frequency dependent. Generally it is believed that lo...

posted by Eric Jacobsen on May 14 2008 under Basics | Wireless | Communication
Comments (0) |

Pulse Shaping in Single-Carrier Communication Systems

Some common conceptual hurdles for beginning communications engineers have to do with "Pulse Shaping" or the closely-related, even synonymous, topics of "matched filtering", "...

posted by Eric Jacobsen on Apr 10 2008 under Basics | Wireless | Communication
Comments (17) |

Linear-phase DC Removal Filter

This blog describes several DC removal networks that might be of interest to the dsprelated.com readers. Back in August 2007 there was a thread on the comp.dsp newsgroup concerning the process of re...

posted by Rick Lyons on Mar 30 2008 under Tips and Tricks
Comments (2) |

New Papers / Theses Section

The new 'Papers & Theses' section is now online: http://www.dsprelated.com/documents.phpThe idea is to list and organize in one place as many DSP related dissertations (PhD & Masters) and pa...

posted by Stephane Boucher on Mar 21 2008 under DSPRelated
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Time Machine, Anyone?

Abstract: Dispersive linear systems with negative group delay have caused much confusion in the past. Some claim that they violate causality, others that they are the cause of supe...

posted by Andor Bariska on Mar 7 2008 under Matlab | Academia / Research
Comments (4) |

Free DSP Books on the Internet

While surfing the "net" I have occasionally encountered signal processing books whose chapters could be downloaded to my computer. I started keeping a list of those books and, over the years...

posted by Rick Lyons on Feb 23 2008 under DSP on the Web
Comments (8) |

Benford’s law solved with DSP

I have a longtime interest in the mystery of 1/f noise. A few years ago I came across Benford’s law, another puzzle that seemed to have many of the same characteristics. Suppose you collect a la...

posted by Steve Smith on Feb 22 2008 under Academia / Research
Comments (2) |

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 (2) |

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 (1) |

Of Forests and Trees and DSP

When Stephane invited me to write a blog for dsprelated.com I immediately came up with a flood of ideas for highly detailed, technical, narrowly focused articles related to the intersection of ...

posted by Tim Wescott on Feb 10 2008 under Basics | Design Methodolgies
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