System, method, and circuit for distance measurement between two nodes of a radio network

US8644768B2 · kind B2 · utility

Assignee

• Atmel Corporation · US

Inventors

• Wolfram Kluge · Dresden, DE
• Eric Sachse · Leipzig, DE

Key dates

• Filing date: Dec 29, 2009
• Grant date: Feb 4, 2014
• Expiry date: Apr 9, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/84
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system and method for distance measurement between two nodes of a radio network is provided. A first unmodulated carrier signal is transmitted by the first node and received by the second node. A second unmodulated carrier signal is transmitted by the second node and received by the first node. A first value and a second value of a first phase are measured by the first node, whereby the first value of the first phase is assigned to a first frequency of the received second carrier signal and the second value the first phase is assigned to a second frequency of the received second carrier signal, whereby the first frequency and the second frequency have a frequency difference. A third value and a fourth value of a second phase are measured by the second node, whereby the third value of the second phase is assigned to a third frequency of the received first carrier signal and the fourth value of the second phase to a fourth frequency of the received first carrier signal, whereby the third frequency and the fourth frequency have the frequency difference. The distance is determined from the frequency difference from the first value and the second value of the first phase and from the …