SIGINT & Blind Signal Analysis with GNU Radio and SDR
Ettus Research SDR evangelist Balint Seeber demonstrates signals intelligence (SIGINT) and blind signal reverse engineering of satellite downlinks using GNU Radio.
Summary
The Methodology of Blind Signal Analysis
When intercepting uncharacterized radio transmissions, signals intelligence analysts must determine modulation types, baud rates, packet framing, and encoding schemes from raw IQ samples.
Capturing and Isolating Satellite Transponder Downlinks
Balint Seeber demonstrates capturing live downlink signals from geostationary satellites and low-Earth orbit transponders using high-gain dish antennas and USRP SDRs.
Interactive Reverse Engineering in GNU Radio
Seeber walks through carrier recovery, clock synchronization, constellation mapping (BPSK, QPSK, FSK), and frame preamble alignment.
Extracting Telemetry and Raw Data Streams
The author demonstrates recovering unencrypted digital telemetry, weather satellite imagery, and aircraft data streams from raw RF captures.
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