C3Subtitles: 35c3: Digital Airwaves
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Digital Airwaves

Software Defined Radio Basics and some Modulation Theory

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Video duration
00:46:08
Language
English
Abstract
Encoding or decoding random radio-waveforms doesn't need incredible expensive hardware anymore which offers new possibilities for building up over-the-air communication systems. There are Software Defined Radios providing affordable cellular radio to remote villages, Community Radios are using SDR to build up digital radio networks and other cool stuff.

Some basic knowledge what is going on in SDR Hard/Software as the influence of the samplerate, I/Q-data of the math behind the waterfall-diagram is helpful to have fun with SDR. Some theory on modulation techniques helps you to decode or encode your waveforms.

With a cheap DVB-T USB receiver used with some SDR-Software you can already have a look whats going on in the airwaves around you at certain frequencies. But what happens between the antenna and your computer display showing or decoding the signal? The talk should give basic information and background about SDR and some modulation theory.

There will probably be a SDR Challenge at the Congress to practice you new skills.

Talk ID
9508
Event:
35c3
Day
1
Room
Clarke
Start
5:30 p.m.
Duration
01:00:00
Track
Hardware & Making
Type of
lecture
Speaker
Friederike

Talk & Speaker speed statistics

Very rough underestimation:
111.2 wpm
610.5 spm
33.5% Checking done33.5%
66.5% Syncing done66.5%
0.0% Transcribing done0.0%
0.0% Nothing done yet0.0%

English: Quality control done until

Last revision: 4 months, 3 weeks ago

Talk & Speaker speed statistics with word clouds

Whole talk:
111.2 wpm
610.5 spm