Phased-MIMO Room-Object Speech Eavesdropping — 77 GHz mmWave Through Walls (Shi CCS'23)

End-to-end 3D walkthrough of the ACM CCS 2023 phased-MIMO attack: airborne speech vibrates common room objects (tinfoil, paper bag, plastic bin, cardboard box) → a 77 GHz TDM phased-MIMO radar (TI AWR2243) steers transmit beamforming + synthesized virtual array + receive beamforming onto the object for ~10 dB SNR gain → SAMV angle estimation + Kurtosis range-bin object identification → phase calibration + STFT spectrogram → MobileNet + gradient-reversal domain-adaptation recovers spoken digits with no victim labels, at 88–98% in-room and 81–94% through opaque walls.

Scene 103 of 108 in the StopBeingParanoid interactive 3D research collection. Requires JavaScript and WebGL2 for the interactive visualisation.

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