Abstract: A method is provided for estimating a time-of-flight (TOF) in a wireless communication between first and second devices. The method includes receiving a signal, transmitted from the second device, at first and second antennas of the first device. The second antenna is spaced apart from the first antenna on the first device. A difference in arrival time of the received signal at the first antenna and at the second antenna is computed by the first device. A non-line-of-sight (NLOS) signal path of the received signal in a TOF estimation is compensated for using the difference in arrival time of the received signal between the first antenna and the second antenna. In another embodiment, a communications device having multiple antennas is provided that compensates for the NLOS signal path using the method.

Abstract: UWB tag for determining a presence of a living object, wherein the UWB tag includes at least one UWB frontend transceiver, and the UWB tag is configured to transmit several pulses and to receive several associated reflected channel-impulse responses and to subsequently evaluate the same with respect to a change in the received associated reflected channel-impulse responses, wherein determining the change in the associated reflected channel-impulse responses indicates the presence of the living object.

Abstract: A method for determining an angle of arrival at a communication device is described. The method comprises performing a message exchange between the communication device and a further communication device. The message exchange comprises receiving at least one first message associated with a first frequency at the communication device by means of a first antenna and a second antenna and receiving at least one second message associated with a second frequency at the communication device by means of the first antenna and the second antenna. The method further comprises determining the angle of arrival defined by an orientation of the communication device and a transmission direction of the message exchange, wherein the angle of arrival is determined based on the received first message and the received second message. Furthermore, a corresponding communication device is described.

Abstract: Aspects of the present disclosure provide a dual phase-locked loop (PLL) system configured to execute parallel, time shifted ranging session scheduling even if the sessions use different communication channels. Using techniques described herein, in some embodiments, a delay between ranging sessions is reduced compared to other UWB session scheduling implementations, which allows for more compact scheduling and often more accurate measurements as a result.

Abstract: A communication device and a corresponding device operating method include an ultra-wideband (UWB) communication unit enabling UWB communication with at least one external communication device, and a processing unit performing a ranging session between the communication device and the external communication device. The ranging session includes one or more distance measurements based on messages exchanged between the communication device and the external communication device. The messages are exchanged through the UWB communication unit. The device also includes a prioritization unit configured to prioritize the ranging session using a synchronization indicator associated with the ranging session.

Abstract: There is described a ultra-wide band (UWB) communication device, comprising: i) a UWB antenna, configured to receive a UWB signal from a further UWB communication device, and ii) a control device, configured to iia) determine an angle of arrival (?) based on the received UWB signal, iib) determine a distance between the UWB communication device and the further UWB communication device, and thereby iic) compensate for a distance determination disturbance using the determined angle of arrival (?). Further, a UWB communication system and a method of determining a distance are described.

Abstract: Aspects of the present disclosure are directed to communicating data for authentication and location determination, such as for authenticating a key FOB and locating the key FOB within a defined distance. As may be implemented in accordance with one or more embodiments, a plurality of headerless packets, respectively including scrambled timestamp sequence (STS) packets but not including encoding and/or synchronization headers, are communicated between respective communication circuits. A time of flight (TOF) value indicative of time elapsed between transmission and reception of the plurality of headerless packets is assessed based on the STS packets. A distance between the communication circuits is determined based on the assessed time of flight.

Abstract: Disclosed are methods and devices for, UWB, ranging of a target using a plurality of antenna arrays. The method comprises: determining a first RSSI, from a first antenna of a first antenna arrays, and a second RSSI from a second antenna of a second antenna arrays; in response to the first RSSI being larger than the second RSSI, selecting the first antenna array, and selecting the second antenna array otherwise; using the selected antenna array, performing a UWB ranging measurement including measuring an angle of arrival of the signal from the target; including, if the angle of arrival of the signal from the target is out of range: selecting a different one of the plurality of antennae arrays, as a presently-selected antenna array; and, using that antenna array, performing a UWB ranging measurement including measuring an angle of arrival of the signal from the target.

Abstract: There is described a communication device, configured to perform a single-sided two-way-ranging, SS-TWR, communication with a further communication device, the communication device comprising a control device being configured to: i) transmit a first SS-TWR signal to the further communication device, ii) receive a second SS-TWR signal, associated with the first SS-TWR signal, from the further communication device, iii) evaluate a carrier frequency offset of the received second SS-TWR signal, and iv) determine, based on the evaluation, if an attack is performed to the SS-TWR communication.

Abstract: 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.

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 t

Abstract: A method is provided for estimating a time-of-flight (TOF) in a wireless communication between first and second devices. The method includes receiving a signal, transmitted from the second device, at first and second antennas of the first device. The second antenna is spaced apart from the first antenna on the first device. A difference in arrival time of the received signal at the first antenna and at the second antenna is computed by the first device. A non-line-of-sight (NLOS) signal path of the received signal in a TOF estimation is compensated for using the difference in arrival time of the received signal between the first antenna and the second antenna. In another embodiment, a communications device having multiple antennas is provided that compensates for the NLOS signal path using the method.

Abstract: Aspects of the present disclosure provide a dual phase-locked loop (PLL) system configured to execute parallel, time shifted ranging session scheduling even if the sessions use different communication channels. Using techniques described herein, in some embodiments, a delay between ranging sessions is reduced compared to other UWB session scheduling implementations, which allows for more compact scheduling and often more accurate measurements as a result.

Abstract: Aspects of the present disclosure are directed to communicating data for authentication and location determination, such as for authenticating a key FOB and locating the key FOB within a defined distance. As may be implemented in accordance with one or more embodiments, a plurality of headerless packets, respectively including scrambled timestamp sequence (STS) packets but not including encoding and/or synchronization headers, are communicated between respective communication circuits. A time of flight (TOF) value indicative of time elapsed between transmission and reception of the plurality of headerless packets is assessed based on the STS packets. A distance between the communication circuits is determined based on the assessed time of flight.

Abstract: A sensor node is provided having a radio frequency (RF) circuit and a sensor interface circuit. The RF circuit wirelessly harvests energy from an external device such as a smart phone to produce a voltage at an output to charge a storage capacitor. The sensor interface circuit is configured to communicate with a sensor. In response to a request from the external device, the sensor node provides a voltage level of the capacitive element to the external device. The external device uses the voltage level to determine capabilities of the sensor node and to control sensing functions of the sensor node. In another embodiment, a method is provided to operate the sensor node.

Abstract: In accordance with a first aspect of the present disclosure, a system is provided, comprising: a user device to be monitored for unauthorized displacement, an ultra-wideband (UWB) communication unit configured to set up a UWB communication channel with an external localization device and to perform at least one localization operation through said UWB communication channel, and a processing unit configured to detect said unauthorized displacement of the user device by analyzing an output of said localization operation. In accordance with a second aspect of the present disclosure, a localization device is provided, comprising: an ultra-wideband (UWB) communication unit configured to set up a UWB communication channel with an external system and to perform at least one localization operation through said UWB communication channel, and a processing unit configured to detect an unauthorized displacement of a user device comprised in said external system by analyzing an output of said localization operation.

Abstract: In accordance with a first aspect of the present disclosure, a communication node is provided, comprising: an ultra-wideband (UWB) communication unit configured to enable UWB communication with a plurality of external communication nodes; a processing unit configured to perform ranging sessions between the communication node and said external communication nodes, wherein said ranging sessions comprise one or more distance measurements based on messages exchanged through the UWB communication unit between the communication node and said external communication nodes; and a prioritization unit configured to prioritize said ranging sessions in dependence on at least one previously measured distance between the communication node and the respective external communication nodes. In accordance with a second aspect of the present disclosure, a method of operating a communication node is provided.

Abstract: A sensor node is provided having a radio frequency (RF) circuit and a sensor interface circuit. The RF circuit wirelessly harvests energy from an external device such as a smart phone to produce a voltage at an output to charge a storage capacitor. The sensor interface circuit is configured to communicate with a sensor. In response to a request from the external device, the sensor node provides a voltage level of the capacitive element to the external device. The external device uses the voltage level to determine capabilities of the sensor node and to control sensing functions of the sensor node. In another embodiment, a method is provided to operate the sensor node.

Abstract: In accordance with the first aspect of the present disclosure, an ultra-wideband communication node is provided, comprising: an ultra-wideband communication unit configured to transmit one or more ultra-wideband frames to an external device; a processing unit configured to determine scrambled timestamp sequences for said ultra-wideband frames; wherein the processing unit is further configured to determine designated time slots, within which said scrambled timestamp sequences are to be received by said external device.

Abstract: In accordance with a first aspect of the present disclosure, a method is conceived for determining the position of at least one node in a communication network, wherein the communication network comprises a localization system that includes a processing unit, a primary anchor and at least one secondary anchor, the method comprising: the primary anchor transmits a poll message to the node and to the secondary anchor; the primary anchor receives a response message from the node; the secondary anchor receives said poll message from the primary anchor and said response message from the node; the processing unit calculates the position of the node using position information and timing information, wherein said position information is position information of the primary anchor and of the secondary anchor, and wherein said timing information is timing information of the poll message transmission by the primary anchor, of the poll message reception by the node and the secondary anchor, of the response message transmi