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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) |

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) |

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) |

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 (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 (13) |