Geolocation

摘要

In selected embodiments, a process of geolocation of a transmitter uses a receiver with an antenna array that is non-line-of-sight (NLoS) to the transmitter. A first plurality of scatterers within line-of-sight (LoS) of the array is located using multilateration based on time difference of arrival (TDoA) from the first scatterers, and applying a spatial consistency requirement. Time of emission/reflection from the first scatterers is also determined. The coordinates and timing of the first scatterers are used to locate either the transmitter or another set of scatterers, by applying multilateration to the TDoA at the first scatterers, and applying the spatial consistency requirement. The process is iteratively repeated until the transmitter is identified. The multilateration may be linearized without sacrificing precision. In each iteration, a non-singularity requirement is applied to ensure that the selected scatterers produce unambiguous results.

主权项

1. A process of geolocation of at least one radio frequency (RF) transmission source using an antenna array, the process comprising steps of:
locating a first plurality of scatterers within line-of-sight (LoS) of the antenna array using (1) Spatial Consistency algorithm, and (2) multilateration based on time difference of arrival (TDoA) of signals at the antenna array, wherein for each scatterer of the first plurality of scatterers coordinates and time of emission of reflections of transmissions from the at least one RF transmission source are estimated; locating the at least one RF transmission source based on the coordinates and the times of emission estimated for the first plurality of scatterers, thereby obtaining coordinates of the at least one RF transmission source; and providing the coordinates of the at least one RF transmission source, the step of providing comprising at least one of displaying, storing, and transmitting coordinates of the at least one RF transmission source.