Doppler RADAR

Chip Transceiver (Emitter and Receiver)

FMCW RADAR

Horn antenna - Katabi MIT lab "EQ-Radio"

RADAR approach combined with algorithms for emotion detection

FMCW / Homodyne

RADAR

Parabolic antenna (dish) - RADAR cardiogram at 15 ft - Remote Vital Sign Monitor (RVSM) for Atlanta Olympics(1996) 

Doppler Laser/LIDAR

MIT Tech Review: "The Pentagon has a laser that can identify people from a distance—by their heartbeat".

(Remote cardiac biometrics)