A method is provided for radar ranging using an IR-UWB radar transceiver. The range is determined by measuring a time required by a transmitted pulse to be reflected by an object and returned to the transceiver. The method includes transmitting a ranging signal having a predetermined sequence of positive and negative pulses using a transmitter of the transceiver. A receiver of the transceiver receives a signal having a reflected portion and a feedthrough portion. In the method, the receiver cancels the feedthrough portion using a delayed pulse polarity signal such that when the delayed pulse polarity signal is multiplied and accumulated with the received signal, the feedthrough portion is canceled, and the reflected portion is amplified. In another embodiment, a transceiver is provided that cancels the feedthrough portion while amplifying the reflected portion. Cancelling the feedthrough portion allows short-range operation by removing a blind range of the transceiver.

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 the environment, the current information stored in the radar system, and/or external information provided to the radar system. The system allows improved resolution of range, Doppler and/or angle depending on the desired objective.

An interference removal filter that includes a combination of a first filter and a second filter, where the first filter passes signals over a frequency range of size B with a variation of less than +/3 dB, where the peak value of the impulse response of the second filter is displaced in time from the peak value of the impulse response of the first filter by at least 2/B time units, and where the combination of the first filter and the second filter produces a notch in frequency at a frequency location within the frequency range.

An Ultra Wide Band (UWB) ranging method, a UWB ranging device, and a non-transitory storage medium thereof are provided. The UWB ranging method includes: filtering, in response to determining a first time of flight for UWB ranging, the first time of flight based on a low-pass filter to obtain a filtered first time of flight; and performing the UWB ranging based on the filtered first time of flight.

A method of transmitting signals from a first node having multiple transceivers to a second node is disclosed. The method comprises receiving a message from the second node at the first node, wherein the message is received by each of a plurality of transceivers of the first node; and transmitting by each of the plurality of transceivers a respective data frame to the second node in response to the message; wherein each transceiver initiates the transmission of its respective data frame a predetermined time period after receipt of the message by the transceiver; and wherein the transmissions of the data frames from the plurality of transceivers overlap. The data frames may form part of a two-way ranging exchange.

Disclosed is a method for ultra-wide band (UWB) security ranging and a UWB device configured to perform secure ranging. The method includes obtaining, from a UWB sub-system of the UWB device, first encryption data including a symmetric key encrypted with a public key of a secure application of the UWB device; transferring the first encryption data to the secure application; obtaining, from the secure application, second encryption data including a ranging data set (RDS) encrypted with the symmetric key; and transferring the second encryption data to the UWB sub-system. In this case, the RDS may include a ranging session key configured to secure a UWB ranging session, and the secure application may be included in a trusted execution environment area.

Systems and methods for multi-view stereo reconstruction using ultra wideband (UWB) communication are provided. Example techniques may include receiving a first two-dimensional image of a three-dimensional object captured by a first device, receiving a second two-dimensional image of the three-dimensional object captured by a second device, receiving an indication of timing and directionality associated with UWB signals exchanged between the first device and the second device, determining relative positions and relative poses of the first device and the second device with respect to one another based on the indication of the timing and directionality associated with the UWB signals exchanged between the first device and the second device, and generating a three-dimensional image of the three-dimensional object based on the first two-dimensional image, the second two-dimensional image, and the relative positions and relative poses of the first device and the second device with respect to one another.

In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: an ultra-wideband (UWB) communication unit configured to carry out UWB communication with an external communication device; a plurality of antennas operatively coupled to said UWB communication unit, at least one inertial sensor; an antenna selection unit configured to select, based on an output of the inertial sensor, a specific antenna of said plurality of antennas for carrying out the UWB communication. 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 example method of ultra-wideband (UWB) sensing performed by a wireless communication device, the method comprising determining a first channel impulse response (CIR) estimation of a first frequency channel based on a radio access technology (RAT) session, wherein the RAT is different from UWB. The method also comprises determining a second CIR estimation of a second frequency channel based on a UWB session and determining a third CIR estimation of the first frequency channel based on determining a phase difference between the third CIR estimation and the first CIR estimation. The method further comprises determining a total CIR estimation for a combined frequency channel comprising the first frequency channel and the second frequency channel based on stitching the first CIR estimation, the second CIR estimation, and the third CIR estimation.

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.