Method and device for travel time-based location identification with the aid of a triggered or self-triggering reference signal

US7889132B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Schwarzer · Taufkirchen, DE
• Claus Seisenberger · Taufkirchen, DE

Key dates

• Filing date: Aug 22, 2007
• Grant date: Feb 15, 2011
• Expiry date: Feb 5, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S5/021
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for the detection of an object by the TDOA principle is provided. The object transmits a signal, which is received by a plurality of stations having known positions. The stations' clocks can have different unknown time delays in relation to each other. An additional stationary reference station having a known position relative to the stations and transmitting a signal that is received by the stations is provided. An unknown transmission delay can be generated between the emission of the signal from the object and the emission of the signal from the reference station. For each station the difference in travel time between receipt of the signal from the object and the signal from the reference station and the difference of the travel time differences between the stations are determined. Mathematical algorithms for determining the location are performed.