The invention relates to a system for searching for a target beacon (BC) attached to an object or to a living being to be located comprising said target beacon (BC) emitting a target radio signal in an emission range (P) and a detection device (F) capable of detecting the target radio signal (SC) emitted by the target beacon (BC), and to the method for searching for the corresponding target beacon (BC).

A method includes obtaining signal information corresponding to a plurality of radio signals received at two or more sensing devices from a candidate location, determining a plurality of reconstructed signals based on the signal information, determining time-estimates and frequency-estimates based on a correlation between the plurality of radio signals and the plurality of reconstructed signals, determining metadata corresponding to the plurality of radio signals based on the signal information, the time-estimates, or the frequency-estimates, transmitting at least a portion of the metadata to an information combining node, obtaining the portion of the metadata from the information combining node, determining a relationship between the metadata, and determining the candidate location based on the metadata and the relationship between the metadata. Transmission of the plurality of radio signals to the information combining node is restricted based on a bandwidth of the two or more sensing devices or the information combining node.

A method includes obtaining signal information corresponding to a plurality of radio signals received at two or more sensing devices from a candidate location, determining a plurality of reconstructed signals based on the signal information, determining time-estimates and frequency-estimates based on a correlation between the plurality of radio signals and the plurality of reconstructed signals, determining metadata corresponding to the plurality of radio signals based on the signal information, the time-estimates, or the frequency-estimates, transmitting at least a portion of the metadata to an information combining node, obtaining the portion of the metadata from the information combining node, determining a relationship between the metadata, and determining the candidate location based on the metadata and the relationship between the metadata. Transmission of the plurality of radio signals to the information combining node is restricted based on a bandwidth of the two or more sensing devices or the information combining node.

Methods and devices are presented for synchronizing positioning signals in a kinematic location network. In particular, methods and devices are presented for synchronizing a unique positioning signal generated by a positioning-unit device to a reference positioning signal generated by a reference transmitter, where the positioning-unit device and the reference transmitter are moving relative to each other. In certain embodiments the reference transmitter or the positioning-unit device, or both, self-monitor trajectory data comprising one or more of location, velocity or acceleration, e.g. using inertial navigation systems, and broadcast that data in their positioning signals. The trajectory data enables estimation of Doppler shifts and propagation delays associated with the positioning signals, allowing measurement and correction of clock drift for synchronization of the positioning signals.

The position detection of user equipment within a network, and the corresponding methods performed at the network node, user equipment and location server are disclosed, along with these entities and a computer program. The method performed at the network node comprises within a position reference signal time period, broadcasting: a first position reference signal within a first frequency band and during a first time period; and at least one further position reference signal within at least one further frequency band and during at least one subsequent time period, said at least one further frequency band being different to said first frequency band.

Localization systems and methods for transmitting timestampable localization signals from anchors according to one or more transmission schedules. The transmission schedules may be generated and updated to achieve desired positioning performance. For example, one or more anchors may transmit localization signals at a different rate than other anchors, the anchor transmission order can be changed, and the signals can partially overlap. In addition, different transmission parameters may be used to transmit two localization signals at the same time without interference. A self-localizing apparatus is able to receive the localization signals and determine its position. The self-localizing apparatus may have a configurable receiver that can select to receive one of multiple available localization signals. The self-localizing apparatuses may have a pair of receivers able to receive two localization signals at the same time. A bridge anchor may be provided to enable a self-localizing apparatus to seamlessly transition between two localization systems.

A base station transmits, in a repetitive first sequence (501) of transmission frames (202) of a wireless channel, first positioning reference signals (551). The base station transmits, in a repetitive second sequence (502) of transmission frames (202) of the wireless channel, second positioning reference signals (552). The first positioning reference signals (551) and the second positioning reference signals (552) each facilitate determining a time of arrival of signals communicated on the wireless channel.

A method for receiving a reference signal for defining a location in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving, from a serving cell, beacon-positioning reference signal (B-PRS) configuration information transmitted by at least one beacon device; and detecting the B-PRS by using the B-PRS configuration information, wherein the B-PRS configuration information includes B-PRS group configuration information for at least one beacon device group, and the B-PRS group configuration information can include parameters for generating sequences of the B-PRS transmitted by each beacon device belonging to the corresponding group.

A method for receiving a reference signal for defining a location in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving, from a serving cell, beacon-positioning reference signal (B-PRS) configuration information transmitted by at least one beacon device; and detecting the B-PRS by using the B-PRS configuration information, wherein the B-PRS configuration information includes B-PRS group configuration information for at least one beacon device group, and the B-PRS group configuration information can include parameters for generating sequences of the B-PRS transmitted by each beacon device belonging to the corresponding group.

According to one embodiment, an electronic apparatus includes receiver circuitry and controller circuitry. The receiver circuitry is configured to receive a radio signal from a target apparatus. The controller circuitry is configured to estimate first position information of the target apparatus based on a captured image; and estimate second position information of the target apparatus based on both the first position information and information of the radio signal.