Method and system for determining a time difference, method and system for finding a position of a transmitter

摘要

A method for determining a time difference between a first and a second time of arrival of the signal is described, the method including: receiving a first representation of the signal at the first time of arrival; receiving a second representation of the signal at the second time of arrival; correlating at least a first time-domain representation of the signal and a second time-domain representation of the signal to obtain a first time difference information; evaluating a phase difference relation between a first frequency-domain representation of the signal and a second frequency-domain representation of the signal to obtain a second time difference information; and determining the time difference between the first and the second time of arrival of the signal based on the first and the second time difference information, or based on a time difference information derived from the first time difference information and the second time difference information.

主权项

1. A method for determining a time difference between times of arrival of signals at a first receiver and at a second receiver, wherein the first receiver and the second receiver are positioned at different locations, comprising:
receiving a first representation of a first signal at a first time of arrival at the first receiver; receiving a second representation of the first signal at a second time of arrival at the second receiver; correlating at least a first time-domain representation of the first signal derived from the first representation of the first signal and a second time-domain representation of the first signal derived from the second representation of the first signal to acquire a first time difference information or correlating at least a first time-domain representation of a second signal derived from a first representation of the second signal received at the first receiver at a third time of arrival and a second time-domain representation of the second signal derived from a second representation of the second signal received at the second receiver at a fourth time of arrival, to acquire the first time difference information; evaluating a phase difference relation between at least a first frequency-domain representation of the first signal derived from the first representation of the first signal and a second frequency-domain representation of the first signal derived from the second representation of the first signal to acquire a second time difference information; and determining the time difference between the first time of arrival of the first signal and the second time of arrival of the first signal based on the first time difference information and the second time difference information, or determining the time difference between the third time of arrival of the second signal and the fourth time of arrival of the second signal based on the first time difference information and the second time difference information, if the first time difference information is acquired by correlating the first and second time-domain representations of the second signal.