Common Computer Interfaces

What is this stuff?

Electromagnetic Radiation

Electromagnetic radiation is a fundamental phenomenon of electromagnetism, behaving as waves and also as particles called photons which travel through space carrying radiant energy.

Vision

Interference

In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater or lower amplitude.

Propagation

The way waves travel

As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polarization and scattering.

Spectrum

Spectrum

Waves

Low Frequency

Medium & High

Very High

Ultra high (Microwave)

Super High

Extremely High (THz)

Infrared

Visible

UV

X Rays

Gamma

SO!

So...

So?

Layers

Modulation

QAM

Cable Modems

Analog vs Digital Modulation

Pulse width modulation

Time

Software radio

Radio as software

Software on top of radio

So, basically everything computer related.

Important to keep in mind!

Software radio devices

Cognitive radio

The point in which wireless personal [devices] and the related networks are sufficiently computationally intelligent about radio resources and related computer-to-computer communications to detect user communications needs as a function of use context, and to provide radio resources and wireless services most appropriate to those needs.

Joseph Mitola III

RTL-SDR

A USB European TV tuner stick which came with a debug mode, turning it into a wide band general purpose radio receiver.

Internet Amateur Radio

Everything that was old is new again :D

Demo time, Q&A, and THANK YOU!

Thomas Winningham