Scilab and ScicosLab are Open Source Math Programs that can be used in various engineering and scientific applications. I use ScicosLab with the Modnum tool box in all my Telecommunications work, but both Scilab/ScicosLab can be used for all the mathematics involved in my CelNav EBook. In a previous post (Ref.1) I introduced the programs… Continue reading Scilab & ScicosLab – WAV Files
Category: Telecommunications
Telecommunications: Propagation, HF, VHF, UHF, uWave
Scilab & ScicosLab – Graphs
Scilab and ScicosLab are Open Source Math Programs that can be used in various engineering and scientific applications. I use ScicosLab with the Modnum tool box in all my Telecommunications work, but both Scilab/ScicosLab can be used for all the mathematics involved in my CelNav EBook. In a previous post (Ref.1) I introduced the programs… Continue reading Scilab & ScicosLab – Graphs
Splat!_RF Signal Propagation Calculations_2
Example Regional Coverage Analysis In the previous post, I discussed how to use the Friis equation to determine the free space loss and receive level between a transmitter and receiver (Ref.1). The example was for an AIS Class B transmitter on a sailing yacht communicating with another boat at a distance of 10 nautical miles.… Continue reading Splat!_RF Signal Propagation Calculations_2
RF Signal Propagation Calculations_1
Friis Equation A basic equation relating to propagation in free space is the Friis equation (Ref.1). This gives the receive power in terms of transmit power, antenna gains, frequency of operation and separation distance. Basically it is saying that a point source of power is spread out over the surface of an ever expanding sphere… Continue reading RF Signal Propagation Calculations_1
OFDM for SSB_USB
Introduction OFDM Orthogonal Frequency Division Multiplexing is a digital transmission scheme designed to give optimal data performance and selective fading protection over a band limited channel. Data is shared over a series of individually modulated carriers. OFDM is now pervasive over many different transmission systems. Typical applications include: Digital Television, DRM Digital Shortwave Broadcasting, DSL… Continue reading OFDM for SSB_USB