Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Such UWB systems through their receivers may operate in the presence of interfering signals and should provide for robust communications. Accordingly, an accurate and sharp filter that operates at low power is required and beneficially one that does not require a highly accurate power heavy clock. Further, many UWB applications require location and/or range finding of other elements and it would therefore be beneficial to provide a UWB based range finding and/or location capability removing the requirement to add additional device complexity and, typically significant, power consumption.

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.

A method includes determining one or more active slots and inactive slots in an ultra-wide band (UWB) ranging round. The method also includes determining multiple silent periods in the ranging round based on an arrangement of the inactive slots. The method also includes determining a target silent period in the ranging round, among the multiple silent periods, to be used for WiFi communication. The method also includes determining multiple target wake time (TWT) parameters such that a TWT session period defined by the TWT parameters overlaps with the target silent period. The method also includes determining one or more second silent periods preceding the target silent period in which the TWT parameters can be negotiated with an access point (AP) for the WiFi communication. The method also includes negotiating the TWT parameters with the AP during the one or more second silent periods.

Embodiments of a device for wireless communication are disclosed. In some embodiments, the device includes: a transceiver configured to receive a message from a second device and at least one processor. The processor is communicatively coupled to the transceiver and is configured to: generate a response message includes a SYNC portion, a start frame delimiter (SFD) portion, and a cipher portion. The SYNC portion includes a sequence of symbols forming a preamble. The cipher portion includes a ciphered sequence of pseudo-randomized pulses. The transceiver is further configured to transmit the response message.

A method for determining the multipath components of a propagation channel in a geolocation system or an IR-UWB telecommunications system. The IR-UWB emitter emits a plurality of UWB impulses at a plurality of central frequencies, sequentially or in parallel. The receiver translates the response of the channel to each of these impulses into the baseband, integrates it over a plurality of time intervals in order to provide intensity samples related to successive times of flight. The intensity samples related to the same time of flight and to the various frequencies are combined in order to provide a composite sample at the output of a multiband IR-UWB receiver module. The multipath components are determined from the composite samples exceeding a predetermined threshold value.

A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on one or more of a selected range resolution, a selected velocity resolution, and a selected angle of arrival resolution, as defined by memory requirements and processing requirements. The system allows improved resolution of range, Doppler and/or angle depending on the memory requirements and processing requirements. The system also adapts to changing environmental conditions including interfering radio signals.

In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: at least two antennas; an ultra-wideband (UWB) communication unit configured to receive UWB frames through said antennas; a controller configured to switch between said antennas such that consecutive UWB frames are received through different ones of said antennas; wherein the controller is further configured to compute channel impulse responses (CIRs) wherein each of said CIRs is based on a different one of said UWB frames. 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 computer program is provided for carrying out said method.

An electronic device is provided. The electronic device includes a communication module, a first ultra-wideband (UWB) module, a second UWB module, and a processor operatively connected to the communication module, the first UWB module, and the second UWB module, wherein the processor is configured to determine a direction of a user's gaze, based on data acquired from the first UWB module and data acquired from the second UWB module, select at least one external electronic device positioned in the gaze direction, and send, through the communication module, a request to the selected external electronic device to output media.

The communication apparatus has at least two transceiver units. One of the transceiver units receives in a predetermined ranging session a time signal from an external device unit, which time signal comprises a device clock state of the device unit at a reference time in a device time zone. The receiving transceiver unit generates a synchronization dataset describing a time relationship between an apparatus clock state at the reference time in the apparatus time zone and the device clock state at the reference time in the device time zone. The receiving transceiver unit initiates a synchronization session, in which the receiving transceiver unit defines a synchronization time grid which has a periodically repeating synchronization block, which provides a session round. In a predetermined session slot of the session round of the periodically repeating synchronization block, the receiving transceiver unit transfers the synchronization dataset to the others of the transceiver units.

A method for operating an ultra-wideband (UWB) device includes detecting the UWB device entering an access-controlled area that includes a gate configured to perform a UWB communication, retrieving an access token from an application server of the access-controlled area through a wireless communication other than the UWB communication prior to the UWB device entering a predetermined range of the gate, and transmitting the access token to the gate through the UWB communication after the UWB device entering the predetermined range of the gate.