A system comprising: a transmitting device configured to transmit, in at least one plane, a plurality of directional signals each covering an angular sector, wherein every adjacent pair of said angular sectors overlaps partially to create a logical sector, and wherein each of said plurality of directional signals encodes at least an indication regarding each said logical sector associated therewith; and a client device comprising program instructions executable by at least one hardware processor to: cause the client device to receive at least some of said plurality of directional signals, calculate a signal strength level (RSL) value for each of said received directional signals, and determine that said client device is located within a said logical sector, when two highest said RSL values (i) are related to two said directional signals associated with said logical sector, and (ii) are within a specified value range of each other.

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.

A first device determines relative position data representative of a position of one or more other user devices relative to the first device. To determine relative position data between the first device and a second device, the first device determines a distance between the first device and the second device at a plurality of timestamps. Additionally, the first device determines movement data at each timestamp from one or more device sensors. The movement data at each corresponding timestamp may reflect movement of the first device and/or the second device between a prior timestamp and the corresponding timestamp. The first device computes relative position data for the second device by combining the distance measurements and movement data over the plurality of timestamps, for instance, through a process of sensor fusion. By computing the relative position data, the first device may determine a transformation that can be used to convert between a coordinate system of the second device and the coordinate system of the first device.

In one aspect, the systems and methods may automatically trigger ranging include a device which may establish a connection between a first device comprising a first ultra-wideband (UWB) antenna and a second device having a second UWB antenna. The device may receive from one or more motion sensors of the first device, motion data of the first device during an inactive ranging phase. The device may determine to switch from the inactive ranging phase to an active ranging phase responsive to the motion data indicating motion of the first device satisfying a threshold criteria. The device may perform a first ranging operation between the first device and the second device using the first UWB antenna of the first device and the second UWB antenna of the second device, responsive to switching from the inactive ranging phase to the active ranging phase.

A device may include a first ultra-wideband (UWB) antenna and one or more processors. The one or more processors may be configured to establish a plurality of respective connections with a plurality of second devices each having a respective UWB antenna. The device may identify an interference condition for at least one of the plurality of connections. The device may update a configuration for traffic sent via the at least one of the plurality of connections according to the identified interference condition, and can transmit a first packet to one of the plurality of second devices according to the updated configuration.

The systems and methods described herein may involve establishing a connection between a first device and a second device. The connection may include a data channel for data traffic and control channel for control traffic. The first device may transmit a management frame to the second device. The second device may validate the management frame, and may transmit data according to the management frame, which may include transmitting control traffic on the data channel responsive to one or more metrics for the data channel satisfying a threshold criteria for the control channel.

A method performed by a first communication device operating in a wireless communications network. The first communication device obtains a set of correspondences associating: i) each set (ω.sub.i) of a plurality of sets of antenna weights (ω.sub.1 . . . ω.sub.i) having been sent by a third communication device in response to having received a respective set (RSs.sub.i) of a plurality of sets of radio signals (RSs.sub.1 . . . RSs.sub.i) from a set of antenna ports in a second communication device, with ii) a respective direction of transmission (d.sub.i) between the second communication device and the third communication device. The respective direction is relative to an orientation (α.sub.i) of the second communication device. The respective direction of transmission (d.sub.i) is a selected direction of transmission (d.sub.i,αi). The first communication device then initiates transmission of a new radio signal, based on the obtained set of correspondences.

Provided is a technology for increasing accuracy of position estimation by estimating a position of a signal source based on an error due to altitudes of a sensor and a signal source and an error due to a pitch of an aircraft as well as an error due to curvature of the earth. At this time, a position estimation method may include receiving measurement data from a plurality of sensors, estimating first position data of the signal source based on the measurement data, identifying an altitude error of the first position data, and estimating second position data that is data obtained by correcting the first position data based on the altitude error.

A variety of methods and devices for a low-probability of intercept, low probability of denial (LPI/LPD) method of providing RF signals in denied spaces are disclosed. A phased array antenna converts an omnidirectional communication system into a highly directional system. This factor coupled with the precise timing between the transmit and receive sets, establishes a precise distance measurement between the two sets. Using three or more transceivers enables the composition of an ad hoc network of nodes that can be used to establish an available mesh of position and timing that can be accessed by operators within the radio boundaries of the mesh. Portable transceivers reestablish position, navigation and timing (PNT), thereby forming an ad-hoc network. Where the ad-hoc network PNT mesh can intersect with a GPS signal that is outside of the denied environment, the ad-hoc network mesh can detect the GPS position and timing.

The present disclosure relates to a system (1) for measurement of antenna alignment of an array antenna system (2) used for wireless communication. The array antenna system (2) has an antenna position (A) relative a first coordinate system (18) and comprises a control unit (3) and an array antenna (4) having an antenna aperture plane (19), a certain coverage (5) and an initial array antenna orientation (B). The array antenna (4) further comprises a plurality of antenna elements (6) and at least two antenna ports (7, 8, 9, 10), each antenna port (7, 8, 9, 10) being connected to a corresponding subarray (11, 12, 13, 14), each subarray (11, 12, 13, 14) comprising at least one antenna element (6). The system (1) comprises the array antenna system (2) and an unmanned aerial vehicle (15), UAV, arranged to be deployed in the coverage (5) and comprising a UAV antenna arrangement (16) and a positioning module (17) that is adapted to provide UAV position information (C) relative the first coordinate system (18). In at least one UAV position (C), the UAV (15) is adapted to transmit a UAV signal to the array antenna (4) by means of the UAV antenna arrangement (16), the UAV signal comprising the UAV position information (C). The control unit (3) is adapted to detect signals corresponding to the received UAV signal at the antenna ports (7, 8, 9, 10), and to determine a determined array antenna orientation (D) by means of determined phase differences between the detected signals, the antenna position (A), the initial array antenna orientation (B) and the UAV position information (C).