Multi-Receiver Real-time Physical Intrusion Detection “Burglar Alarm” with GNU Radio ...
summary
Real-time intrusion detection built with GNU Radio and Ettus USRP N310 uses PLL and AGC internals (AGC moved before baseband) to detect motion from QPSK test transmissions at 905 MHz, sampled at about 2048 Hz. Three metrics—amplitude mean, amplitude standard deviation, and energy—run in sliding windows (1 s windows, 30 s arming) inside a GR block (MATLAB prototype converted to C++) and a four‑receiver setup with six ceiling antennas produces a heat map covering roughly half the area; system works but needs tuning for false alarms.
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chapters (10)
- 0:00Introduction
- 1:26Intrusion detection phases
- 3:13Initial tests and flow graph
- 5:01Hardware setup and baseline
- 8:06Testing in multipath
- 9:28Detection metrics
- 11:11Real-time processing
- 13:21Multi-receiver testing
- 15:27Heat map and improvements
- 16:58Q&A
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