Provided is a method for sending an in-band positioning signal and in-band positioning system in a communication network. The system includes: a Position Management Station (PMS), arranged to manage one or more Position Service Stations (PSSs) and provide a synchronization reference clock for the one or more PSSs; a positioning center network element, arranged to provide position estimation information for a terminal based on position information of the one or more PSSs and send the position estimation information to the terminal; and the one or more PSSs, of which each PSS uses a same frequency band used by the communication network and is arranged to generate an in-band positioning signal for measuring a distance, regulate a sending clock of the in-band positioning signal according to a difference value between a local sending clock and the synchronization reference clock and send the in-band positioning signal to the terminal.

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.

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.

Devices, systems, and methods for improving performance in positioning systems. Performance may be improved using disclosed signal processing methods for separating eigenvalues corresponding to noise and eigenvalues corresponding to one or more direct path signal components or multipath signal components.

Devices, systems, and methods for improving performance in positioning systems. Performance may be improved using disclosed signal processing methods for separating eigenvalues corresponding to noise and eigenvalues corresponding to one or more direct path signal components or multipath signal components.

The invention is for a system and method of constructing an array of fixed antennas to provide coverage for radio communications to multiple mobile aerial vehicles from a terrestrial location. In one embodiment there is provided antenna system providing radio communications to a plurality or moving aerial vehicles, said system comprising an array of fixed antennas; at least one or a plurality of transceivers selectively connected to the array of fixed antennas; and a control unit configured to switch individual antennas from said array to connect with at least one transceiver. The control unit is configured with a switch matrix to control the connections from the antennas to the plurality of transceivers to implement a desired communications protocol, and the system is further configurable to supply exclusion policies to the control unit which identify which antennas are not to be connected to the switch matrix.

The disclosure includes implementations for determining a position of a vehicle using millimeter wave narrow beamforming. A method may include receiving a set of training packets that each uniquely identify a position on a portion of a roadway where the vehicle is located. Each of the training packets included in the set may be associated with only one of the millimeter wave narrow beams. The method may include identifying a training packet included in the set of training packets that has a highest receive power level among the set of training packets. The method may include determining the position uniquely identified by the training packet having the highest receive power level. The method may include determining positional information for the vehicle based on the position uniquely identified by the training packet having the highest receive power level. The positional information may describe a location of the vehicle on the roadway.

The present inventive concept includes a duct system and method for using same to map and locate ducts. A preferred embodiment of the duct system includes a duct, a plurality of electronic information modules and an oversheath at least partially covering the plurality of information modules and fixing the information modules to the duct. The plurality of information modules are configured to emit a positional signal to enable location of the information modules and associated duct(s) and/or mapping of the duct system.

Disclosed are methods, devices, systems, nodes, apparatus, servers, computer-/processor-readable media, and other implementations, including a method, at a wireless node, for supporting positioning of one or more wireless devices. The method includes transmitting, by the wireless node configured as a positioning beacon, a first downlink signal for supporting positioning of the one or more wireless devices, and transmitting a second downlink signal that inhibits a receiving wireless device, from the one or more wireless devices, from sending uplink signals to the wireless node configured as the positioning beacon.

Disclosed are methods, devices, systems, nodes, apparatus, servers, computer-/processor-readable media, and other implementations, including a method, at a wireless node, for supporting positioning of one or more wireless devices. The method includes transmitting, by the wireless node configured as a positioning beacon, a first downlink signal for supporting positioning of the one or more wireless devices, and transmitting a second downlink signal that inhibits a receiving wireless device, from the one or more wireless devices, from sending uplink signals to the wireless node configured as the positioning beacon.