In this tutorial, Richard G. Lyons, author of the best-selling DSP book Understanding Digital Signal Processing, discusses the estimation of time-domain sinewave peak amplitudes based on fast Fourier transform (FFT) data.

Multipath distortion is a common problem in many DSP-based data transmission systems.  Here, Neil Robertson shows how to model multipath channels using complex-coefficient FIR filters. 

Many DSP systems use composite signals consisting of a sum of sinusoids of the same frequency, often a sine and cosine. In this tutorial, Richard G. Lyons, author of the best-selling DSP book Understanding Digital Signal Processing, thoroughly covers this important DSP topic by explaining and deriving formulas for the sum of two sinusoids of the same frequency.

Like Microsoft, I have long regarded Google as a necessary evil.  An encounter with Google yesterday has reinforced my belief that they're "evil" - despite their famous slogan to the contrary.  (Methinks the Google lady doth protest too much...)  I now question, though, exactly how "necessary" Google is.

Readers of my previous blog entry "What Light Through Yonder Flashlight Shakes?" have asked for details about the science project that caused my son and I to look into shake flashlights in the first place. Here goes.

Fred Allen once said "Imitation is the sincerest form of television."  With 3D becoming increasingly mainstream in movie theatres, television inevitably must follow.

The technology is here.  Flatscreen TVs long have had oversampled frame rates, LCD shutter glasses are a simpler technology than the LCD television you might watch through them, and Blu-Ray players hold oodles of data.  In fact, I'm surprised 3D TV didn't come out sooner.

I recently helped a lad put together a school science project that involved the idea of using "shake flashlights" as a power source.  The idea seemed like a good one when he first proposed it.  But when we began to implement it we immediately ran into a quite unexpected problem: it's impossible to find shake flashlights in retail stores.

I ran into Gall's Law recently, which states: "A complex system that works is invariably found to have evolved from a simple system that worked. The inverse proposition also appears to be true: A complex system designed from scratch never works and cannot be made to work. You have to start over, beginning with a working simple system."