MC Countermeasures

Selecting a Single Emitter
 
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 This figure shows how well the PRED performs in the environment when it is programmed to de-interleave the pulse trains and jam a single emitter at a time.  This test is performed by programming the PRED to select a single emitter at a time and produce a single up-range false target in a consistent location from PRI to PRI.  The Evaluation Station measures the position of the false target on each PRI and counts the position as correct if it is within 60 ns of the desired position.  All emitters are programmed to contain 5% dropped pulses.

 The RED bars show how often the illuminations of each emitter are interleaved.  For example, emitter 0 (Gen_Video0) is present without interference about 75% of the time – i.e. about 25% of its illumination time it is interleaved with other emitters.  For this environment, the emitters are overlapped anywhere from 22 to 40% of their illumination times.  In order to work in such an environment a great deal of real-time de-interleaving capability is required.

 The BLUE bars show the percentage of correctly placed false targets for each emitter.  Even though the scans are overlapping, the PRED is able to consistently de-interleave the pulse trains and produce false targets correctly more than 90% of the time.