A mobile device positioning system includes a receiver to receive data on a plurality of signals received by a mobile device, each of the signals being from a transmitter in an area, the positioning system including a processor configured to execute computer program code for determining, in dependence on the data, a relative distance of the mobile device with respect to each transmitter associated with the respective signals and for determining a position of the mobile device in between the transmitters of the received signals in dependence on the determined relative distance.

According to one embodiment, a wireless receiver includes reception circuitry and processor circuitry. The reception circuitry receives a radio wave from a radio wave emitter. The processor circuitry estimates a parameter of a ratio of a first received power of a line-of-sight component in the radio wave to a second received power of the radio wave, estimate the first received power based on the parameter and a value of the second received power; and calculate a distance to the radio wave emitter, based on the first received power.

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.

There is provided mechanisms for for providing location information in a communications network. A method is performed by a first device. The first device supports positioning of other devices in the communications network. The method comprises acquiring positioning reference signal configuration from a radio network node in the communications network. The method comprises acquiring location information from a local positioning entity. The method comprises providing the location information to at least one of a radio network node and a second device in the communications network. The method comprises transmitting a positioning reference signal according to the positioning reference signal configuration.

An antenna assembly configured to transmit terrestrial positioning signals from a relay platform having a frame of reference, the transmit being in at least a first mode with a radiating pattern having at least a main lobe having a narrow aperture in a plane and a wide aperture in a plane. A relay platform comprising a receiver of a synchronization signal, a transmitter of positioning signals to an area of service comprising a number of rovers, and an antenna assembly configured to produce a radiating pattern adapted to transmit the positioning signals as a function of the environment of the relay platform and the rovers. In a number of embodiments the relay platforms may be organized in a network of platforms, possibly of masters and slaves that receive feed-back from the rovers in the AoS so as to optimize the configuration of the antenna elements dynamically to optimize the QoS of positioning based on a number of selected quality indexes.

A holder for a wirelessly locatable tag may include a snap assembly coupling a first element of the holder to a second element of the holder thereby securing the wirelessly locatable tag within a recess of the holder, the snap assembly including a male assembly having a protrusion component, a female assembly defining an opening that is configured to receive the protrusion component, a groove defined in one of either the male assembly or the female assembly, a compression ring positioned in the groove and configured to retain the male assembly to the female assembly, and a compliant member positioned in the groove and providing a biasing force on the compression ring.

A system and method for measuring the position of one or more object in an area of interest. The system has a primary beacon located at a first fixed position in or near the area of interest which generates a time referenced primary signal, two or more secondary beacons located at different fixed positions in or near the area of interest which generate time referenced secondary signals and one or more portable tag, the portable tag being attachable to the object. The portable tag has a portable tag circuit for calculating the distance of the portable tag to the primary and secondary beacons by a time of flight calculation which uses, the known position of the primary and secondary beacons, time referenced signals and delay information associated with the time referenced signals, such that the portable tag calculates its own position.

A LORAN device may include a housing, and an electrically short LORAN antenna carried by the housing. The LORAN device may have a LORAN receiver carried by the housing and coupled to the electrically short LORAN antenna, and an RF crystal resonator coupled to the electrically short LORAN antenna so that the electrically short LORAN antenna is forced to a resonant condition for a LORAN receive signal.

A system for finding up in a projectile flight relative to earth. The system having a transmitter which transmits polarized reference signals to a guidance sub-system on the projectile. The guidance sub-system includes a magnetometer and polarized and non-polarized receivers. Measurements from the magnetometer are used to determine a general up direction. The polarized and non-polarized receivers are arranged such that, during rotation of the projectile, reference signals received by the polarized receiver modulate whereas reference signals received by the non-polarized receivers are unaffected. A ratio of the strengths of the signals received by the polarized and non-polarized receivers determines alignment of a vertical axis. From the general up direction and alignment of the vertical axis, a precise up direction of the projectile in flight relative to the earth can be determined.

A method and a user equipment (110) as well as a method and a radio transmitter (120) for managing positioning reference signals are disclosed. Moreover, a method and a network node (130) for configuring positioning reference signals are disclosed. The network node (130) sends (A050), to the user equipment (110), a reception configuration of positioning reference signals, wherein the reception configuration comprises a cell identity relating to the radio transmitter (120) and an identifier for determining of positioning reference signals. The network node (130) sends (A070), to the radio transmitter (120), a transmit configuration of positioning reference signals, wherein the transmit configuration comprises the cell identity and the identifier. The radio transmitter (120) determines (A090) the positioning reference signals based on the cell identity and the identifier. The radio transmitter (120) sends (A100) the positioning reference signals to the user equipment (110). The user equipment (110) estimates (A120), based on the positioning reference signals, signal characteristics relating to a position of the user equipment (110). The user equipment (110) sends (A130), to the network node (130), a report about the estimated signal characteristics. Corresponding computer programs and carriers therefor are also disclosed.