Category Archives: SDR

Video tutorial: OFDM packet transceivers with GNU radio

in RF, SDR, tutorials, Videos by the machinegeek | 0 comments

Orthogonal frequency-division multiplexing or OFDM is a method of encoding digital data on multiple carrier frequencies. At this presentation from them recent FOSDEM 2014 conference in Brussels, Martin Braun explained the use of GNU Radio software and an SDR transceiver … Read more

Academic paper: hacking with RF replay attacks

If you’re new to RF hacking you may have heard the term “replay attack” and wondered what it takes to implement one. In this academic presentation Practicing a Record-and-Replay System on USRP a group of researchers from the Shenzhen Key … Read more

Listening to D-STAR digital voice with DSD 1.7

in code, open source, RF, SDR by the machinegeek | 0 comments

Brazilian amateur radio operator PU2VLW has written a post (in Portugese) detailing how to use DSD version 1.7 to decode amateur radio D-STAR digital voice transmissions. (Google translate may be helpful.) DSD can be downloaded as source from GitHub. His … Read more

RTL_FM_Python: An API and web interface for controlling RTL_FM

in open source, RF, SDR, software by the machinegeek | 0 comments

Here’s an interesting piece of open source code known as RTL_FM_Python for controlling the RTL-SDR dongle. “This is a Python library built upon the RTL-SDR project and allows you to use the RTL-SDR dongle to tune in arbitrary stations either … Read more

30C3 video: Monitoring the Spectrum – Building Your Own Distributed RF Scanner Array

in hacks, RF, SDR, Videos by the machinegeek | 0 comments

At the recent 30C3 conference in Hamburg, Germany, Andrew Reiter outlined his efforts in using inexpensive RTL-SDR dongles to build a distributed RF scanner array for monitoring and spectrum mapping. Software-Defined Radio (SDR) has increased in popularity in recent years … Read more

DCC/TAPR video: HackRF – A Low Cost SDR Platform

in open source, RF, SDR, Videos by the machinegeek | 1 comment

In this talk from the 2013 Digital Communications Conference (DCC) co-sponsored by the ARRL and TAPR, developer Michael Ossmann discussed the origins and development of the HackRF Jawbreaker SDR transceiver. This is Michael’s first talk at an amateur radio oriented … Read more

Decoding radio-controlled bus stop displays

Oona Räisänen (a/k/a Windytan) is a self-taught signals and electronics hacker from Helsinki, Finland, who is fascinated by mysteries, codes and ciphers, and vintage tech. She’s previously written regarding the use of digital transmissions carried on FM broadcast subcarriers as … Read more