Covert Ground Based Synthetic Aperture RADAR using a WiFi emitter and SDR receiver
- Track: Software-Defined Radio and Amateur Radio devroom
- Room: UB2.147
- Day: Sunday
- Start: 10:30
- End: 10:55
- Video only: ub2147
- Chat: Join the conversation!
Using a WiFi emitter as radiofrequency source illuminating a scene under investigation for slow movement (e.g. landslides), a Ground-Based Synthetic Aperture RADAR (GB-SAR) is assembled using commercial, off the shelf hardware. The dual-channel coherent Software Defined Radio (SDR) receiver records the non-cooperative emitter signal as well as the signal received by a surveillance antenna facing the scene. Spatial diversity for azimuth mapping using direction of arrival measurement is achieved by moving the transmitter and receiver setup on a rail along a meter-long path -- the longer the better the azimuth resolution -- with quarter wavelength steps. The fully embedded application runs on a Raspberry Pi 4 single board computer executing GNU Radio on a Buildroot-generated GNU/Linux operating system. All development files are available at https://github.com/jmfriedt/SDR-GB-SAR/
Speakers
Jean-Michel Friedt |