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| The ability to generate
credible false targets outside of the PRI limits is a
feature lacking in most PRI tracking systems. This
capability is useful against radars operating with small PRI
values or multi-mode radars that are able to correlate range
measurements made in both low and medium PRF modes for
example.
The following two video clips show
how the PRED PRI Predictor can be used to create false
targets that are reliably generated at ranges beyond a PRI.
This first video clip shows an RGPI
programmed to move linearly from 170 us downrange, through
the skin return and ending at 170 us uprange in 20 seconds.
The PRI pattern is a 4 element, 4 position stagger with a 40
us average PRI. The top trace shows the detected (ie
received) video signal and the bottom trace is the detected
DRFM output. Notice how the entire pattern is walked through
multiple PRIs during the pull with no missing pulses. Also
shown in this clip is the DRFM output when the input video
is blanked for 1.5 seconds. The RGPI profile continues with
no missing pulses. This demonstrates the unmatched ability
of the PRED to produce false target strobes that are not
limited or constrained by the radar PRI as well as the
unique ability of the predictor to work for long periods
without receiving a signal - such as when the receiver is
blanked during ECM transmissions.
This second clip shows a linear
range pull from 900 us uprange moving through the skin
return and ending 900 us downrange. The PRI pattern being
used is a 192 element 192 position (sliding) pattern with an
average PRI of 300 us.
Video
Clip One
Video
Clip Two
In order to watch the video clips you will need WinZip and
windows media play on your computer. Unzip the file and double click
on it to make it run. If you have any questions for comments
please contact
info@mc-cm.com or call us at 1-613-721-1552.
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