Category: Telecommunications

ScicosLab/Scicos is an Open Source Math Program that can be used in various engineering and scientific applications. In this post I look at how an AM Modulator can be built using the Editor in ScicosLab and also with the visual block Editor Scicos with the Modnum Toolbox. Video ScicosLab/Scicos – AM Modulator Download “Learn Telecommunications… Continue reading ScicosLab & Scicos – AM Modulator

In a previous post Ref.1 I looked at VOACAP and it’s use in a simple off air receive situation. In this post I will delve a little further into the software and compare the results against some simple mathematical models. VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software… Continue reading VOACAP – CHU to VE3PKC+

VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA). In this video we will study the propagation between the time signal station CHU located in Ottawa Canada with a receiver located at VE3PKC in Toronto Canada. The actual received signal… Continue reading VOACAP – CHU to VE3PKC

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… Continue reading Dirac Delta Function – δ(t)

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… Continue reading FFT – A Telecommunications Revolution