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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 (15) |

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) |

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
Comments (0) |

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 (12) |

Resolving 'Can't initialize target CPU' on TI C6000 DSPs - Part 2

Configuration The previous article discussed CCS configuration. The prerequisite for the following discussion is a valid CCS configuration file. All references will be for CCS 3.3, but they may be use...

posted by Mike Dunn on Nov 12 2007 under TMS320C6x | Basics | Tips and Tricks
Comments (0) |

A brief look at multipath radio channels

Summary: Discussion of multipath propagation and fading in radio links Radio channels, their effects on communications links and how to model them are a popular topic on comp.dsp. Unfortunately, for m...

posted by Markus Nentwig on Oct 31 2007 under Basics | Tips and Tricks
Comments (7) |

Resolving 'Can't initialize target CPU' on TI C6000 DSPs - Part 1

IntroductionToday I am going to discuss some of the basics that can help prevent errors that frustrate some users. The information is directed toward TI C6000 family DSPs, but much of it also applies ...

posted by Mike Dunn on Oct 30 2007 under TMS320C6x | Basics
Comments (8) |

Modelling a Noisy Communication Signal in MATLAB for the Analog to Digital Conversion Process

A critical thing to realize while modeling the signal that is going to be digitally prcoessed is the SNR. In a reciever, the noise floor (hence the noise variance and hence its power) are determined b...

posted by Parth Vakil on Oct 30 2007 under Matlab | Basics
Comments (3) |

Delay estimation by FFT

Summary: The delay between a signal and a reference appears in the frequency domain as linear phase shift. It can be estimated with subsample accuracy using FFT methods.This article provides a Matlab ...

posted by Markus Nentwig on Sep 22 2007 under Matlab | Basics | Tips and Tricks
Comments (15) |

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.signumconcepts.co...

posted by Markus Nentwig on Sep 18 2007 under Basics
Comments (7) |