The Radio Meteor Signal Path from Transmitter to Spectrogram, Part 1

Figure 1. Overview of the radio meteor signal path.

This is part one of a rather basic article that describes the complete signal path of a radio meteor, from the sinusoidal carrier wave that is initially transmitted, to the spectrogram that is typically used as the final result in the receiving chain. I have presented this material at…

Submitted on 1 August 2016
Why is Eb/N0 the Natural Figure of Merit in Digital Communications?

In digital communications, the measure of the signal to noise ratio of a signal is Eb/N0. Why is that? To figure it out, let’s start from the classical SNR, which is the ratio of the average signal power S to the average noise power N, given by…

Tom Wed, 06/29/2016 - 18:54
Gravitational Waves, a New Observational Window on the Universe

Simulation of two merging black holes [image: SXS, the Simulating eXtreme Spacetimes (SXS) project]

Not that I am going to try, but it is difficult to underestimate the importance of the first detection of gravitational waves for physics. Apart from the fact that it is another gloriously successful test for general relativity, it actually opens up a new observational window on the universe…

Tom Sun, 04/24/2016 - 17:28


The Moving Average in the Financial Sector

Figure 4. Impulse (left), step (middle), and frequency (right) responses for Spencer’s 15-point moving average.

When researching what to include in The Moving Average as a Filter and Variations on the Moving Average, I came across a lot of references to applications in the financial sector. This is not my forte, but, just for fun, I gave a few of the moving averages that are used there the same treatment as the filters in…

Submitted on 29 February 2016