Nxp B.v.

Dominik Doedlinger

Michael Schober

Frank Leong

Stefan Tertinek

Christian Eisendle

In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: a communication unit configured to execute a time-of-flight ranging session with an external communication counterpart; a clock offset measurement unit configured to measure a frequency offset of a device clock, wherein said device clock is configured to be used by the communication unit when said ranging session is executed; a processing unit configured to determine whether the measured frequency offset of the device clock has a predefined correlation with a frequency offset of a counterpart clock, wherein said counterpart clock is configured to be used by the external communication counterpart when said ranging session is executed. In accordance with a second aspect of the present disclosure, a corresponding method of operating a communication device is conceived. In accordance with a third aspect of the present disclosure, a corresponding computer program is provided.

Communication device and method of operating the same

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, as a second condition, whether the first lower value is smaller than the second lower value; and if at least one of the first condition and the second condition is not fulfilled, setting the time of arrival to the candidate time value. Furthermore, a UWB ranging device and a UWB system are described.

UWB ranging method, device, and system

An angle of arrival (AoA) of an electromagnetic wave is determined. A phase of an antenna signal associated with each of two receive antenna is measured. A measured phase difference of arrival (PDoA) of the electromagnetic wave is determined based on the measured phase of each of the antenna signals. The measured PDoA is corrected based on one or more crosstalk factors associated with the two receive antennas. The AoA of the electromagnetic wave at the two receive antenna is generated based on the corrected measured PDoA.

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Graz, Austria

Dominik Doedlinger