Devices, systems and processes for identifying and detecting an interfering signal are described. A process may include conducting a scan of one or more frequency bands to obtain at least one scan result and determining therefrom if a response condition has been detected. If so detected, a first frequency band corresponding to the detected response condition may be identified and a response condition action to be performed determined. If no response condition action is to be performed, scanning continues. If a response condition is to be performed two or more available sensors are identified and a first sensor is selected. A scan plan is developed and then initiated by the first sensor. Data from the first sensor is received and analyzed to identify a second frequency band indicative of an interfering signal. Based on at least the scan data, a location for a signal interference source (SIS) may be estimated.

Techniques are disclosed for determining a true bearing angle from an airborne platform to a source of a radar signal. In an embodiment, a grid is generated based on a coarse range to, and angle-of-arrival of, an electromagnetic signal. The grid represents a geographic area thought to contain the emission source. A measured spatial angle is computed for each pulse of the signal received during a data collection interval. Hypothesized spatial angles are computed for a point in each grid box in the grid. A score is generated for each grid point based on the computed hypothesized spatial angles for the grid point and the measured spatial angles. The grid point having the lowest score is identified as a seed location and is used to launch a Nelder-Mead algorithm that converges on a point in the grid. A true bearing angle to the source of a radar angle is computed to the point provided by the Nelder-Mead algorithm.

A system for determining a direction of arrival of a radio signal being emitted by a radio emitter, the system including: a single antenna configured to be moved through multiple spatial positions and configured to receive the radio signal at two or more of the multiple spatial positions; and a controller configured to determine one or more directions of arrival of the radio signal based on: a radio signal frequency; at least one residual phase difference value between at least two of two or more residual phase values each obtained based on the radio signal received by the single antenna at one of the two or more multiple spatial positions; and at least a portion of a motion data indicative of the movement of the single antenna.

An apparatus is disclosed, the apparatus comprising means for estimating a first angle (θ.sub.1) between a first path between a first base station and at least one target node and a second path between the first base station and a second base station, and estimating a second angle (θ.sub.2) between a third path between the second base station and the at least one target node and the second path. The apparatus also comprises means for determining a value (Δd) indicative of a difference between a first distance between the at least one target node and the first base station and a second distance between the at least one target node and the second base station, wherein determining the value is based on the estimated first and second angles (θ.sub.1) (θ.sub.2) and a known distance (l) between the first and second base stations.

An apparatus is disclosed, the apparatus comprising means for estimating a first angle (θ.sub.1) between a first path between a first base station and at least one target node and a second path between the first base station and a second base station, and estimating a second angle (θ.sub.2) between a third path between the second base station and the at least one target node and the second path. The apparatus also comprises means for determining a value (Δd) indicative of a difference between a first distance between the at least one target node and the first base station and a second distance between the at least one target node and the second base station, wherein determining the value is based on the estimated first and second angles (θ.sub.1) (θ.sub.2) and a known distance (l) between the first and second base stations.

A method of associating data with a physical location comprises receiving, by at least two receiver antennae, a radiofrequency (RF) signal transmitted by a mobile device, the RF signal conveying data collected by the mobile device from an external source; calculating, for each of the at least two receiver antennae, a phase of the RF signal received by each receiver antennae; calculating, based on the calculated phases, a physical location from where the mobile device transmitted the RF signal; and associating the data conveyed by the RF signal and the external source from which the data were collected with the calculated physical location from where the mobile device transmitted the RF signal.

An electronic device includes an indoor positioner and a positioning engine server. The indoor positioner has an antenna array including a plurality of antenna units. The indoor positioner divides the antenna units into multiple antenna unit groups, receives a wireless signal from user equipment at each time point via the antenna unit groups, and calculates a plurality of angles of arrival (AOA) corresponding to the antenna unit groups at each time point. The positioning engine server receives and stores the angles of arrival corresponding to the antenna unit groups at each time point, and filters the angles of arrival according to the angle sizes of the angles of arrival corresponding to the antenna unit groups at each time point stored in an observation period.

An electronic device includes an indoor positioner and a positioning engine server. The indoor positioner has an antenna array including a plurality of antenna units. The indoor positioner divides the antenna units into multiple antenna unit groups, receives a wireless signal from user equipment at each time point via the antenna unit groups, and calculates a plurality of angles of arrival (AOA) corresponding to the antenna unit groups at each time point. The positioning engine server receives and stores the angles of arrival corresponding to the antenna unit groups at each time point, and filters the angles of arrival according to the angle sizes of the angles of arrival corresponding to the antenna unit groups at each time point stored in an observation period.

A dual band radio frequency signal acquisition and source location system, provided with a steerable phased array antenna operable in a first and a second radio frequency band. A digital signal processor electrically connected to the steerable phased array antenna is configured to control steering of an antenna beam of the steerable phased array antenna and apply frequency time division multiplexing to radio frequency signaling in the first and the second radio frequency bands. In particular, the first frequency band may be 2.4 GHz Bluetooth/Bluetooth Low Energy, and the second frequency band may be 900 MHz passive UHF RFID.

A dual band radio frequency signal acquisition and source location system, provided with a steerable phased array antenna operable in a first and a second radio frequency band. A digital signal processor electrically connected to the steerable phased array antenna is configured to control steering of an antenna beam of the steerable phased array antenna and apply frequency time division multiplexing to radio frequency signaling in the first and the second radio frequency bands. In particular, the first frequency band may be 2.4 GHz Bluetooth/Bluetooth Low Energy, and the second frequency band may be 900 MHz passive UHF RFID.