I gave the opening talk at the SDR dev room at FOSDEM again this year. There will be video posted on the FOSDEM website at some point, but I have also added my material here.
- The talk PDF.
- Exploring the concept of extra currents.
- Viewing the currents in the frequency domain.
- Generating an impulse as a wideband signal source.
- Creating a receiving filter to mimic tuning an antenna.
- Generating a simple signal.
The talk ended with me showing the ability to capture the transmitted signal on a Nexus 7 running a GNU Radio Android app with an RTL-SDR dongle. The Android branch of GNU Radio and a HOWTO will be made available soon.