Geolocation

Resolve complex interference in real time

Many different signal types are potential sources of interference, indicators of illegal activity or unauthorised spectrum use.

Direction finding and individual geolocation techniques are each effective for only a limited range of target signal types, which varies according to many factors including signal bandwidth, modulation, power, background noise, pulse duration and receiver speed.

The most reliable and cost-effective method to ensure detection and successful localization of the maximum range of target signal types is to combine each technique in a single real-time overlay. The RFeye® supports multiple DF and geolocation techniques including Angle of Arrival (AOA), Time Difference of Arrival (TDOA) and Power on Arrival (POA).

RFeye software enables multiple simultaneous geolocations to be performed on multiple target frequencies. The software outputs geolocation results as POA and TDOA probability heat maps and overlays real-time AOA vectors onto map interfaces. When combined with the 3D topographical displays and the additional user-defined data layers that can be input via import wizards, this visualisation of the geolocation results provides an unrivalled means of tracking signal source in real time. Multiple results can be overlaid simultaneously onto the map for ease of visualisation and analysis.

The mapping tools include full zoom facility and ability to display many simultaneous maps, with Shuttle Radar Topography Mission (SRTM) data overlay available to aid geolocation analysis.

RFeye software supports several different map formats (OpenStreetMaps, MapQuest or custom tiles), satellite imagery (ESRI, MapQuest Aerial, GeoStage or custom tiles) and SRTM elevation data. These data sets can be Alpha blended and overlaid on top of one another to give the best possible view of the terrain and structures. Additional custom graphical data can be overlaid on the map windows in Shape and GeoTiff file formats Geolocation processor modules are included for Time Difference of Arrival (TDOA), Angle of Arrival (AOA) and Power on Arrival (POA) geolocation.

The software can also be used in a powerful simulation mode allowing for the geolocation and real-time monitoring functionality of RFeye software to be tested with simulated Nodes. RFeye software includes the modelling capability to detect and geolocate different signal types taking account the sensitivity, density and positioning of receiver Nodes. Detailed settings are available to specify receiver and transmitter parameters maximising real-world correspondence. Example receiver settings include noise figure, antenna gain and sweep rate while transmitter parameters include modulation type, constellation rotations and the ability to define pulsed and frequency hopping signals. Trajectories can also be added to simulate non-stationary transmitters and receivers.

Check out videos of our simulation and modelling software here

An optional Propagation Analysis module is available for modelling optimal receiver positioning and other scenarios in a given location taking account actual terrain, customer-defined building structures, and Fresnel diffraction.