UWB ranging method, device, and system

US12196840B2 · kind B2 · utility

Assignee

• NXP B.V. · NL

Inventors

• Dominik Doedlinger · Wildon, AT
• Michael Schober · Graz, AT
• Christian Eisendle · Graz, AT

Key dates

• Filing date: Aug 12, 2022
• Grant date: Jan 14, 2025
• Expiry date: Jul 29, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/765
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

There is described a method of determining a time of arrival of a signal at a UWB ranging device comprising a first antenna, the signal being transmitted by another UWB ranging device, the method comprising: determining a first channel impulse response based on at least a part of the signal received at the first antenna; determining a first time value as an earliest point in time at which the amplitude of the first channel impulse response exhibits a peak value; setting a candidate time value to the first time value; determining a first upper value as the amplitude of the first channel impulse response at a time value corresponding to the candidate time value plus a predetermined upper time value; determining a second upper value as the peak value plus a predetermined upper amplitude value; determining a first lower value as the amplitude of the first channel impulse response at a time value corresponding to the candidate time value minus a predetermined lower time value; determining a second lower value as the peak value minus a predetermined lower amplitude value; determining, as a first condition, whether the first upper value is larger than the second upper value; determining, …