METHOD, US OF SAID METHOD AND ARRANGEMENTS IN AN ELECTRONIC SUPPORT MEASURES SYSTEM
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Abstract
A method and arrangement for processing signals emitted by a plurality of apparent emitters that is detected by an Electronic Measures System/Direction Finder unit (ESM1). The ESM1 unit is adapted to identify a real emitter and at least one false emitter among said apparent emitters, based on the variance of emitter characterizing parameters for each apparent emitter. When false and real emitters have been identified, this information may be used to suppress clutter from false emitters, and/or to determine the position of the real emitter using observations from only one ESM/DF unit.
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Citations
36 Claims
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1-18. -18. (canceled)
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19. A method for identifying real and false emitters observed by an Electronic Measures System, wherein said real and false emitters are identified by pulse processing the received signals, de-interleaving the signals, emitter processing the signals determining emitter characterizing parameters for each apparent emitter, the method comprising the steps of:
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determining the variance of each emitter characterizing parameter; selecting those apparent emitters originating from the real emitter into a group; sorting the apparent emitters according to the variance of the emitter characterizing parameters; and identifying the apparent emitter with the least variance values as the real emitter, and the other apparent emitters in the group as false emitters. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An apparatus for identifying real and false emitters observed by an Electronic Measures System, the Electronic Measures System (ESMi), comprising:
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a plurality of receiving antennas each with an individual receiving channel; and a processing unit wherein the processing unit is configured to pulse process, de-interleave and emitter process signals determining emitter characterizing parameters for each apparent emitter; said processing unit further including means configured to determine the variance of each emitter characterizing parameter, means configured to select those apparent emitters originating from the real emitter into a group, means configured to sort the apparent emitters according to the variance of the emitter characterizing parameters, and means configured to identify the apparent emitter with the least variance values as the real emitter, and the other apparent emitters in the group as false emitters. - View Dependent Claims (32)
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33. An apparatus for determining the position of an emitter, comprising:
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an Electronic Measures System/Direction Finder unit adapted to receive signals from a plurality of apparent emitters, the Electronic Measures System/Direction Finder unit including a plurality of receiving antennas, each with an individual receiving channel and a processing unit; the processing unit including; means configured to identify a real emitter and at least one false emitter among said apparent emitters, said false emitter corresponding to a scattered signal from said real emitter, the means adapted to determine a first bearing to said real emitter, means configured to identify a second bearing to said at least one false emitter; means configured to determine the position of a scattering point for the signal creating said false emitter along the second bearing using a terrain model; means configured to determine a third bearing of the signal from the real emitter to the scattering point; and means configured to determine the position of said real emitter from the position of the scattering point and said first and third bearings. - View Dependent Claims (34, 35, 36)
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Specification