It's finally time to start looking at the relationship between the discrete Fourier transform (DFT) and the discrete-time Fourier transform (DTFT). Let's look at a simple rectangular... read more >>

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One challenge of teaching Fourier transform concepts is that each concept can be (and is) interpreted and explained in many different ways. It isn't always obvious how the different... read more >>

Many of you were onto me immediately last week. I asked you to estimate the frequency of the sampled cosine signal below, and readers quickly chimed in to guess that this question was... read more >>

I know, I know ... I've really fallen behind in my blog posting the last month or so. Shifting responsibilities in my "real job" have left me snowed under for the last few weeks, and I... read more >>

A couple of papers have been published recently that are related to some of my old blog topics. Almost exactly a year ago I posted an xUnit-based unit test harness for MATLAB to the MATLAB... read more >>

Previously in my Fourier transforms series I've talked about the continuous-time Fourier transform and the discrete-time Fourier transform. Today it's time to start talking about the... read more >>

Last fall Loren wrote a blog post about a new syntax in R2009b for ignoring function inputs or function outputs. For example, suppose you call sort and only want the second output. In R2009b... read more >>

Some interesting IEEE articles arrived in my mailbox this week. Computing in Science and Engineering has "MCALab: Reproducible Research in Signal and Image Decomposition and Inpainting," by Fadili,... read more >>

In the last two posts in my Fourier transform series I discussed the continuous-time Fourier transform. Today I want to start getting "discrete" by introducing the discrete-time Fourier... read more >>