TIME DIFFERENCE OF ARRIVAL MEASUREMENT SYSTEM

摘要

A method and apparatus for measuring the time difference of arrival between two received signals, each received signal being a time delayed version of a transmitted signal (12) as intercepted at two different sensors (24/124) where the transmitted signal is generated by a radio frequency transmitter (10). The apparatus includes a sensor (24) having a receiver (15) which receives a received signal and generates a receiver output signal, a decoder (27) which decodes an encoded signal transferred from another sensor (124) to generate a reconstructed signal (28) representative of the transmitted signal received at the other sensor (124) and a correlator (29) for correlating the reconstructed signal and the receiver output signal to determine a time difference of arrival (30) of the receipt of the transmitted signal at the respective sensors.