Introduction The unit impulse or Dirac Delta function δ(t) is an essential building block of modern telecommunications, similar in importance to the FFT that was examined in the previous post. The function came about as a result of research done by the British Physicist Paul Dirac on the modelling of a point charge (Ref.1). It […]

# Category: Telecommunications

Telecommunications: Propagation, HF, VHF, UHF, uWave

The FFT or Fast Fourier Transform was described by Cooley & Tukey in their 1965 paper “An Algorithm For The Machine Calculation of Complex Fourier Series” (Ref.1). The method has earlier roots in the works of Carl Gauss and others (Ref.2). The purpose of the FFT is to reduce the calculation complexity of the DFT […]

In the previous post, I discussed using Splat! to predict the receive level of an RF signal. In particular I considered CBLFT UHF CH25 as received from the CN Tower as shown above in Figure 1. In order to study ATSC_8VSB which is the DTV standard used in North America, GNU Radio can be used […]

About Splat! Splat! is an RF Signal Propagation, Loss, And Terrain analysis tool for the electromagnetic spectrum between 20 MHz and 20 GHz. Splat! software is Copyright © 1997-2018 by John Magliacane KD2BD. Ref.1. Splat! is free software. It may be redistributed and/or modified under the terms of the GNU General Public License Version 2 […]

## Balcony ATSC HD Television

For some time I have wanted to see how many television channels I could receive from the CN Tower in Toronto. I can clearly see the TV antenna at the top of the tower from my apartment balcony, although it is boxed in on both sides by buildings. The 7.6Km Google Earth path is shown […]