The invention relates to a method for locating at least two sources emitting electromagnetic pulses in an environment comprising two reflectors.

The method comprises receiving, by a detector, for each source to be located, at least one same emitted pulse, received directly from said source and received by reflection on one of the reflectors.

The method further comprises: identification of the pulses received directly and the pulses received by reflection, grouping by pairs of pulses received directly with pulses received by reflection, calculating, for each pair, the difference between the date of arrival of the pulse received by reflection relative to the date of arrival of the pulse received directly, and determining the distance of each source from the detector from calculated differences in dates of arrival.

The invention relates to a method for locating at least two sources emitting electromagnetic pulses in an environment comprising two reflectors.

The method comprises receiving, by a detector, for each source to be located, at least one same emitted pulse, received directly from said source and received by reflection on one of the reflectors.

The method further comprises: identification of the pulses received directly and the pulses received by reflection, grouping by pairs of pulses received directly with pulses received by reflection, calculating, for each pair, the difference between the date of arrival of the pulse received by reflection relative to the date of arrival of the pulse received directly, and determining the distance of each source from the detector from calculated differences in dates of arrival.

A system and a method for managing a cellular network database for determining a position of a terminal device, wherein the database comprises multiple observation data sets (ODSP), wherein one or more observation data set(s) (ODSP) is/are assigned to one cell, wherein a first collection of observation data sets (ODSP) comprises at least one observation data set (ODSP) assigned to a first cell, wherein a further collection of observation data sets (ODSP) comprises at least one observation data set (ODSP) assigned to a further cell, wherein at least one cell-identifying information and at least one cell coverage-related information and/or at least one base station position-related information is determined for each collection, wherein the first collection and the further collection are assigned to one cell if at least one cell identity-related criterion and at least one cell coverage-related criterion and/or at least one base station position-related criterion is fulfilled.

A system and a method for managing a cellular network database for determining a position of a terminal device, wherein the database comprises multiple observation data sets (ODSP), wherein one or more observation data set(s) (ODSP) is/are assigned to one cell, wherein a first collection of observation data sets (ODSP) comprises at least one observation data set (ODSP) assigned to a first cell, wherein a further collection of observation data sets (ODSP) comprises at least one observation data set (ODSP) assigned to a further cell, wherein at least one cell-identifying information and at least one cell coverage-related information and/or at least one base station position-related information is determined for each collection, wherein the first collection and the further collection are assigned to one cell if at least one cell identity-related criterion and at least one cell coverage-related criterion and/or at least one base station position-related criterion is fulfilled.

A system for determining location information for a wireless device is described. The system includes a UE, a LE and multiple LMUs. The LE sends, to the LMUs, reception instructions with characteristics of the signal transmission from the UE and each LMU receives, from the LE, the reception instructions. The UE sends a signal transmission. Each LMU receives the transmitted signal from the UE, determines locating information based at least in part of the received signal and sends the locating information to the LE. The LE receives the locating information regarding the transmitted signal and determines a location of the UE based at least in part on the received locating information. Methods, apparatus and computer readable media are also described.

Estimating the position of a receiver using positioning signals and Doppler frequency measurements. Approaches for estimating the position of a receiver using positioning signals and Doppler frequency shift measurements determine an initial estimate of a receiver's position using ranging signals from a first system, generate Doppler frequency shift measurements using the Doppler positioning signals from a second system, and refine the initial estimate using the Doppler frequency shift measurements.

Position determination for a mobile station is achieved through the modification of certain Wi-Fi access point and station signals, that are radiated by a certain master (i.e., guiding) base station, combined with slave (i.e., guided) stations having known coordinates, and processing the signals received from these base stations at the mobile station to determine the desired position.

This disclosure describes methods and apparatus to promote sustainable usage of smartphones such as preventing phone loss, preventing overheating and overcharging, and decreasing packaging waste. A method and apparatus to prevent phone loss is disclosed. Radio frequency beacons (or tags) attached to the owner transmit signals to the smartphone. The distance of the owner from the smartphone is estimated based on the quality of the received radio frequency signals in the smartphone. The system alerts user whenever the distance gets farther than a preset value. A method and apparatus to prevent overcharging of the battery is also disclosed. A plugging mechanism is presented that will be automatically detached from the smart phone when the battery is fully charged. Moreover, an alerting system is disclosed that alerts the user to stop using the device when the internal temperature of the device gets hotter than a preset threshold.

Systems and methods for locating one or more radio frequency identification (RFID) tags are provided. A phase difference of received information signals of illuminated RFID tags is utilized to locate the RFID tags. One or more exciters transmit interrogation signals to illuminate the RFID tags in which the exciters may have a plurality of antenna selectively configured to transmit through two or more antennas and to receive on one antenna. Multiple reads of the same RFID tag can also be performed to generate a probability model of the location of the RFID tag. An enhanced particle filter is applied to probability model to determine the exact location of the RFID.

Systems and methods for locating one or more radio frequency identification (RFID) tags are provided. A phase difference of received information signals of illuminated RFID tags is utilized to locate the RFID tags. One or more exciters transmit interrogation signals to illuminate the RFID tags in which the exciters may have a plurality of antenna selectively configured to transmit through two or more antennas and to receive on one antenna. Multiple reads of the same RFID tag can also be performed to generate a probability model of the location of the RFID tag. An enhanced particle filter is applied to probability model to determine the exact location of the RFID.