A method for mapping underground sensors onto a network map may include obtaining a plurality of magnetic measurements from a plurality of sensors. The method may include using the plurality of magnetic measurements for determining a plurality of sensor locations in an initial network map. The method may include generating updated network maps from the perspective of each localized sensor. The method may include merging the updated network maps into a final network map, the final network map comprising a most accurate location for each sensor. The method may include determining inner localized sensors out of the plurality of sensors in the final network map. The method may include identifying the inner localized sensors as new base station anchors. The method may include mapping the inner localized sensors onto the final network map as new base station anchors.

Embodiments include devices and methods for navigating an unmanned autonomous vehicle (UAV) based on a measured magnetic field vector and strength of a magnetic field emanated from a charging station. A processor of the UAV may navigate to the charging station using the magnetic field vector and strength. The processor may determine whether the UAV is substantially aligned with the charging station, and the processor may maneuver the UAV to approach the charging station using the magnetic field vector and strength in response to determining that the UAV is substantially aligned with the charging station. Maneuvering the UAV to approach the charging station using the magnetic field vector and strength may involve descending to a center of the charging station. The UAV may follow a specified route to and/or away from the charging station using the magnetic field vector and strength.

An imaging system includes an illumination unit and a sensor unit disposed on a printed circuit board. The illumination unit includes a diode laser source inside an illumination housing. The sensor unit includes an image sensor having a pixel array and a lens barrel mounted on the image sensor with an adhesive, and an optical fiber coupled between the illumination housing and image sensor. The optical fiber is configured to collect a portion of light from the interior of the illumination housing that is emitted by the diode laser source and direct the portion of light to a corner of the pixel array of the image sensor that is located outside the lens barrel.

An imaging system includes an illumination unit and a sensor unit disposed on a printed circuit board. The illumination unit includes a diode laser source inside an illumination housing. The sensor unit includes an image sensor having a pixel array and a lens barrel mounted on the image sensor with an adhesive, and an optical fiber coupled between the illumination housing and image sensor. The optical fiber is configured to collect a portion of light from the interior of the illumination housing that is emitted by the diode laser source and direct the portion of light to a corner of the pixel array of the image sensor that is located outside the lens barrel.

One or more processors of an electronic device detect a communication device electronically in communication with a content presentation companion device operating as a primary display for the electronic device and including a first ultra-wideband component. The one or more processors determine, with a second ultra-wide component carried by the electronic device, a distance between the electronic device and the content presentation companion device using an ultra-wideband ranging process. The one or more processors then dynamically enhance a user interface of the content presentation companion device as a function of the distance between the electronic device and the content presentation companion device. The enhancing adjusts a user interface feature being presented on the content presentation companion device.

A sound signal corresponding to a sound emitted by a sound source is inputted to a frequency analysis unit (101), and the frequency analysis unit (101) performs frequency analysis of the sound signal and generates a spectrogram. Spectrogram template information indicating spectrograms corresponding to each of at least a plurality of predetermined movement speeds, the spectrograms being for cases in which the sound source is moved, is stored in a model storage unit (102). An estimation unit (103) estimates the movement speed of the sound source on the basis of the spectrogram generated by the frequency analysis unit (101) and the plurality of spectrograms indicated by the spectrogram template information stored in the model storage unit (102).

There is provided a method and/or an apparatus for time of arrival, TOA, measurements. One method includes: performing, at a sample resolution, a correlation process on a received measurement signal to achieve a measurement correlation function; determining a peak sample and correlation data of at least one additional sample preceding and/or following the peak sample in the measurement correlation function; determining a TOA and/or distance on the basis of the peak sample and correction data acquired by at least the correlation data of the at least one additional sample preceding and/or following the peak sample and pre-assigned configuration data associated to the transmission channel acquired at a subsample resolution.

There is provided a method and/or an apparatus for time of arrival, TOA, measurements. One method includes: performing, at a sample resolution, a correlation process on a received measurement signal to achieve a measurement correlation function; determining a peak sample and correlation data of at least one additional sample preceding and/or following the peak sample in the measurement correlation function; determining a TOA and/or distance on the basis of the peak sample and correction data acquired by at least the correlation data of the at least one additional sample preceding and/or following the peak sample and pre-assigned configuration data associated to the transmission channel acquired at a subsample resolution.

Embodiments of the present invention disclose a Wi-Fi ranging method including: receiving, by a target node, a first NDP sent by a reference node and recording a first NDP receiving time of receiving the first NDP, and sending a second NDP to the reference node and recording a second NDP sending time of sending the second NDP; receiving, by the target node, a ranging response frame sent by the reference node, where the ranging response frame includes a first NDP sending time at which the reference node sends the first NDP and a second NDP receiving time at which the reference node receives the second NDP; and calculating, by the target node, a distance between the target node and the reference node based on the first NDP receiving time, the second NDP sending time, the first NDP sending time, and the second NDP receiving time.

Embodiments of the present invention disclose a Wi-Fi ranging method including: receiving, by a target node, a first NDP sent by a reference node and recording a first NDP receiving time of receiving the first NDP, and sending a second NDP to the reference node and recording a second NDP sending time of sending the second NDP; receiving, by the target node, a ranging response frame sent by the reference node, where the ranging response frame includes a first NDP sending time at which the reference node sends the first NDP and a second NDP receiving time at which the reference node receives the second NDP; and calculating, by the target node, a distance between the target node and the reference node based on the first NDP receiving time, the second NDP sending time, the first NDP sending time, and the second NDP receiving time.