A system for estimating position information with respect to at least one target node including for example two static nodes, at least one reference node, the at least one target node, and at least one processing unit. In this context, at least two of the at least two static nodes are configured each as a source for wirelessly transmitting at least signal fragments. Furthermore, at least two of the at least one reference node and the at least one target node are configured each as a receiver for wirelessly receiving the signal fragments from the at least two sources. In addition to this, the at least two receivers are configured to measure the phases of a set of common signal fragments from the at least two sources and to estimate position information with respect to the at least one target node on the basis of the phase measurements.

Systems and method for location determination in a distributed system are disclosed. In one aspect, the distributed system operates at frequencies where obstacles and distance may preclude direct connection between a system node and a remote mobile device. The system may determine the location of the remote mobile device using an intermediate device and thus be a location system. Specifically, a position of the intermediate device relative to the system node is calculated and a position of the remote mobile device relative to the intermediate device is calculated. The two positions may be combined to determine a position of the remote mobile device relative to the system node. Once the location of the remote mobile device is known relative to the system node, a variety of location services become available.

Recent decades have brought tremendous advances in communication systems which have given rise to the global proliferation of smartphones and other mobile communication systems. A signal processing system implements technical solutions for determining building footprints from inputs including signal data associated with mobile communication devices.

A system and methods are disclosed for reducing Rx/Tx timing errors in a wireless network for latency of positioning measurements. Additionally, a system and methods are disclosed for increasing positioning accuracy by mitigating NLOS errors and/or by performing two-stage beam sweeping for DL-AoD. Further, a system and methods are disclosed for performing M-sample positioning measurements to improve latency reporting in connection with positioning reporting.

A method of localizing a near vertical incidence skywave emitter. At a first site a first elevation angle of an incoming signal issued by the near vertical incidence skywave emitter is measured. At a second site a second elevation angle of an incoming signal issued by the near vertical incidence skywave emitter is measured, wherein the second site is different to the first site. The first elevation angle measured and the second elevation angle measured are converted into a first length and a second length respectively, which represent the distance between the respective site and the estimated location of the near vertical incidence skywave emitter. The respective length is processed, thereby generating an estimated area of the near vertical incidence skywave emitter for each of the different sites such that at least two different estimated areas are generated. The estimated areas for each site are superimposed, thereby obtaining an area of interest encompassing the estimated location of the near vertical incidence skywave emitter. Further, a direction finding system is described.

Communication devices and corresponding methods for RF-based communication and position determination are disclosed. An initiator communication device (1) comprises an antenna unit (10) configured to transmit and receive RF signals, a beamforming unit (11) configured to perform beamforming and to control the antenna unit to transmit and/or receive RF signals using one or more selected beams, a control unit (12) configured to control the beamforming unit (11) in a training phase to perform beamforming for determining an initiator line of sight, LOS, beam to a responder communication device (2), and a processing unit (13) configured to determine the initiator LOS beam and/or initiator angular information of the initiator LOS beam and to determine the position of said communication device using the determined initiator LOS beam and/or initiator angular information in a measurement phase.

Systems, apparatuses, and methods for determining locations of wireless nodes in a network architecture are disclosed herein. In one example, a system includes a first wireless node having a wireless device with one or more processing units and RF circuitry for transmitting and receiving communications in the wireless network architecture including a first RF signal having a first packet. A second wireless node having a wireless device with a transmitter and a receiver enables bi-directional communications with the first wireless node in the wireless network architecture including a second RF signal with a second packet. The one or more processing units of the first wireless node are configured to execute instructions to determine a round trip time estimate of the first and second packets, to determine channel state information (CSI) of the first and second wireless nodes, and to calibrate hardware to determine hardware delays of the first and second wireless nodes.

Methods and systems are described which use a sensing system in cooperation with a wireless communication system. Coordinate information (which may be from the sensing system, from an electronic device, or from a network-side device) and signal-related information (which may be from the wireless system) are associated with each other. The associated information may be used for wireless communication management, such as beam management operations, among others.

A terminal positioning method includes: determining that there is no Line Of Sight (LOS) between a first communication node and a terminal, wherein there is a reflecting object between the first communication node and the terminal; determining first position information of the reflecting object according to a first beam of the first communication node, the first beam is a beam, detected by the terminal to have a strongest signal, among a plurality of beams of the first communication node; and determining a position of the terminal according to the first position information.

A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.