Method, use of said method and arrangements in an electronic support measures system

11 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 (ESM). The ESMunit 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.