HYBRID-BASED SYSTEM AND METHOD FOR INDOOR LOCALIZATION

摘要

A system for estimating position of a mobile electronic device that is located within a detection space, the mobile electronic device maintains a mobile device system time and includes an electroacoustic transducer, a mobile device processor coupled with the electroacoustic transducer, and a mobile device radio frequency (RF) communication module operative to receive a time-synchronization signal from a reference time provider maintaining a reference time, the mobile electronic device is provided with an ultrasonic transmission code and the reference time, the system comprising at least one ultrasonic transmitter that respectively maintains an ultrasonic transmitter system time and that is provided with said ultrasonic transmission code, said at least one ultrasonic transmitter comprising a processor; an RF communication module operative to receive said time-synchronization signal from said reference time provider, said processor synchronizes said ultrasonic transmitter system time with said reference time, by reception of said time-synchronization signal; and an ultrasonic electroacoustic emitter, said ultrasonic electroacoustic emitter emitting an ultrasonic transmission characterized by a particular sound emission signature, according to said ultrasonic transmission code, wherein said electroacoustic transducer detects at least part of said ultrasonic transmission, said mobile device processor calculates a mobile device system time difference between said mobile device system time and said reference time, said mobile device processor calculates distances of said mobile electronic device to each of said at least one ultrasonic transmitter by measuring respective propagation delays of each of said ultrasonic transmissions with respect to said ultrasonic transmission code and to said mobile device system time difference, so as to compute an estimated said position of said mobile electronic device.