Patent ID: 11914061
Assignee: ELTA SYSTEMS LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. A non-transitory computer readable medium comprising instructions that, when executed by at least one processing circuitry, cause the at least one processing circuitry to perform operations comprising estimating a physical location of a signal source, said estimating comprising:
obtaining measured data indicative of a signal Sn informative of the signal S and received the signal source by each of a number of at least two receivers {Rcn} during time intervals {Δtn}, where n is an index indicating the nth receiver Rcn,
obtaining position data indicative of positions {Rn} of said at least two receivers during said time intervals {Δtn} respectively;
applying a processing to determine differential phase differences ΔΔφm,n which represents a difference between accumulated phases, Δφm and Δφn, of the signals, Sm and Sn, received by at least one pair {m,n} of the receivers, Rcm and Rcn during time intervals {Δtn}, {Δtm}, respectively,
applying a processing to determine a first estimate of the physical location of said signal source based on said position data and said differential phase differences {ΔΔφm,n} of said at least one pair {m,n} of receivers, said first estimate being associated with an accuracy area,
applying a processing to determine data representative of difference in times of arrival of modulation patterns of the signals Sm, Sn received by said at least one pair {m,n} of receivers, and
for said at least one pair {m,n} of receivers, using at least said data representative of difference in times of arrival of the modulation patterns of the signals, said differential phase differences ΔΔφm,n, and said accuracy area to determine one or more second estimates êSrck of the physical location of the signal source, wherein at least some of these one or more second estimates êSrck of the physical location of the signal source are located within the accuracy area, and
using the one or more second estimates êSrck to estimate the physical location of the signal source.