Software Defined Radio, also known as #SDR, is about modulating and demodulating radio signals in software. Instead of having special electronic circuitry to do this, like a mixer or demodulator, SDR uses software. Of course, there is some hardware involved in turning analog signals into digital and vice versa, but that is all you need. This video explains how to build a software-defined FM radio receiver with a HackRF One input device and GNU Radio Companion for the software.

Contents
========
0:00 Intro
0:13 Introduction
2:00 HackRF One & SDR software
2:42 Preparations
2.54 GNU Radio Companion GRC
3:38 New project
4:20 The input source
5:01 Add a spectrum analyzer
5:37 First try
6:45 Add a global variable
7:33 Mixing
8:34 Tune to an FM radio station
9:14 Down converting
10:16 Demodulating
10:35 Sample rate conversion
12:07 Listen to the radio
12:21 Add a tune slider
13:17 Add a volume control
14:02 Done!

Resources
=========
- Great Scott Gadgets video course on SDR by Michael Ossman: https://greatscottgadgets.com/sdr/
- Buy HackRF One: https://www.elektor.com/great-scott-g...
- SDR at Elektor: https://www.elektor.com/catalogsearch...
- SDR in Elektor Magazine: https://www.elektormagazine.com/searc...

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