172256 ⎘
Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves; Systems for determining direction or position line using the Doppler shift introduced by the relative motion between beacon and receiver
SYSTEM AND METHOD FOR ENABLING DETERMINATION OF A POSITION OF A RECEIVER WITHIN A SPACE
#2SYSTEM AND METHOD FOR ENABLING DETERMINATION OF A POSITION OF A RECEIVER WITHIN A SPACE
#3Acoustic positioning transmitter and receiver system and method
#4System and method for enabling determination of a position of a receiver within a space
#5Acoustic positioning transmitter and receiver system and method
#6Method and system for presence detection
#7Using ultrasound to improve IMU-based gesture detection
#8Acoustic positioning system and method
#9ROBUST ULTRASONIC INDOOR POSITIONING SYSTEM WITH HIGH ACCURACY
#10Method and system for presence detection