Distance measurement between two nodes of a radio network

US9274218B2 · kind B2 · utility

Assignee

• Atmel Corporation · US

Inventors

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

Key dates

• Filing date: Mar 22, 2013
• Grant date: Mar 1, 2016
• Expiry date: Sep 21, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W64/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In certain embodiments, a method includes transmitting, by a first node, a first signal with a first frequency. The method includes receiving a second signal with a second frequency by downmixing the second signal to an intermediate frequency. The method includes determining a first value of a first phase for the second frequency. The method includes transmitting a third signal with a third frequency, the first frequency and the third frequency having a frequency difference, and receiving a fourth signal with a fourth frequency, the second frequency and the fourth frequency having the frequency difference. The method includes determining a second value of the first phase for the fourth frequency. The first frequency and the second frequency are spaced apart by an amount of the intermediate frequency, and the third frequency and the fourth frequency are spaced apart by the amount of the intermediate frequency.