UE location determined by collecting and preprocessing signal data at a detector and sending extracted data to a remote locate server. The detector buffers samples from signals provided by receive channels, detects known reference signals from receive channels based on reference signal parameters, isolates symbols carrying the reference signal from frames, extracts data from symbols, and sends extracted data to locate server. The locate server receives the extracted data, estimates locate observables based on the extracted data and calculates the UE location based on the estimated locate observables, the reference signal parameters and the extracted data. The detector and/or the server may also generate correlation coefficients between reference signals carrying spectrum received from a serving cell and utilize the correlation coefficients to cancel a serving cell signal in symbols that include known in advance reference signals from the serving cell and one or more neighboring cells of the wireless system.

Methods, systems, and devices for wireless communications are described. A position of a user equipment (UE) may be determined when communications between the UE and a base station are routed through a relay node. For example, the UE 115 may determine whether communications are received from the base station or the relay node based on positioning assistance data that contains positioning-related information about different base stations and relay nodes in the system. The UE may then transmit a position metric based on this determination, where a location server uses this position metric for determining the location of the UE. Additionally or alternatively, the location server or base station may use the positioning assistance data to determine whether an uplink transmission is received directly from the UE or via the relay node and may generate a position metric that the location server uses for determining the location of the UE.

UE location determined by collecting and preprocessing signal data at a detector and sending extracted data to a remote locate server. The detector buffers samples from signals provided by receive channels, detects known reference signals from receive channels based on reference signal parameters, isolates symbols carrying the reference signal from frames, extracts data from symbols, and sends extracted data to locate server. The locate server receives the extracted data, estimates locate observables based on the extracted data and calculates the UE location based on the estimated locate observables, the reference signal parameters and the extracted data. The detector and/or the server may also generate correlation coefficients between reference signals carrying spectrum received from a serving cell and utilize the correlation coefficients to cancel a serving cell signal in symbols that include known in advance reference signals from the serving cell and one or more neighboring cells of the wireless system.

One embodiment is a method including: receiving signals of at least 4 paths from the Tx UE; measuring a ToA, an AoA, an AoD of each of the signals of 4 paths, determining each distance between the Rx UE and each scatter of each 4 paths, each distance between the Rx UE and the Tx UE and a driving direction of the Tx UE, based on the ToA, AoA and AoD; determining a position of the Tx UE based on results of measurement and results of the determination, wherein an assumption that each of x-axis distance and y-axis distance between the Tx UE and Rx UE based on the AoA, AoD and the driving direction of the Tx UE are identical in signal path 1 and signal path p (p=2, 3, 4) is used for determination of the position.

This application provides an angle measurement result sending method and an apparatus. The method includes: The second device receives a reference signal sent by the first device; the second device measures the reference signal to obtain a first angle measurement result, where the first angle measurement result is a measurement result of a first measurement object, the first measurement object is a direct path or a reflection path, the first angle measurement result includes M angle measurement parameters, at least one of the M angle measurement parameters in the first angle measurement result includes a plurality of angle measurement values, and M is a positive integer greater than or equal to 1; the second device sends the first angle measurement result to the location management device; and the location management device determines the location of the first device based on the first angle measurement result.

An approach is provided for dynamic beacons address allocation. The approach involves reporting, by each child node of a beacon tree structure, to a parent node, a load collection packet including a load count of each child node. Each child node is either a leaf node or a parent node. The parent node is either a root node or a child node reporting to another node. The parent node is located on a shortest path from a leaf node to the root node. The load count is a total number of the other nodes reporting to the parent node plus one. The approach also involves receiving, by each child node from the parent node, an address distribution packet that includes a contiguous logical address range and a weighted distance to the root node (WDR). The WDR and/or the tree structure are provided as an input for a drone navigation task.

A method including associating an ultra-wide band (UWB) tag device with a UWB anchor device, capturing UWB range and angle data representing a plurality of locations in a physical space using a calibration technique, capturing UWB range and angle data representing a first location of the UWB tag device in relation to the UWB anchor device, capturing UWB range and angle data representing a second location of the UWB tag device in relation to the UWB anchor device, and determining a length based on the first location and the second location.

A method is disclosed for estimating one or more user terminal locations over a target coverage area by wireless signals transmitted by one or more access points and reflected by one or more reconfigurable intelligent surface panels. The method includes transmission of one or more pilot signals by each of the one or more access points, reflecting, by at least one of the one or more reconfigurable intelligent surface panels, the one or more pilot signals according to one or more predetermined reflection patterns, receiving the reflections by the user terminal, extracting one or more features from the reflections, and estimating of a user terminal location by a method based on a database comprising pairs of locations and the one or more features.

A method for launching a round from an airborne platform, receiving a plurality of RF signals at the round, determining an amount of time between a first and second received RF signal, where the second signal is a multi-path signal and the first signal is a direct path signal. An altitude of the round is determined based on the delay between the first and second received signal and aligning the round's flight path with an initial velocity vector of the aircraft platform to reduce dispersion. The round can include a plurality of sensors for detecting the RF signals. The second received RF signal may be a multi-path signal having been reflected off of the earth's surface or another object on the earth's surface. The altitude of the round can be determined using the known altitude of the airborne platform, the delay of time between the first and second received signals, and the speed of light.

Methods, apparatus and systems for radio-assisted signal estimation are described. In one example, a described system comprises: a sensor configured to obtain a baseband mixture signal in a venue; a transmitter configured to transmit a first radio signal through a wireless channel of the venue; a receiver configured to receive a second radio signal through the wireless channel; and a processor. The baseband mixture signal comprises a mixture of a first source signal and an additional signal. The first source signal is generated by a first motion of a first object in the venue. The second radio signal differs from the first radio signal due to the wireless channel and at least the first motion of the first object in the venue. The processor is configured for: obtaining a radio feature of the second radio signal, constructing a first adaptive filter for the baseband mixture signal based on the radio feature, filtering the baseband mixture signal using the first adaptive filter to obtain a first output signal, and generating an estimation of the first source signal based on the first output signal.