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Clutter Guard is used to prevent any fluctuations in the power return due to environmental factors which can change it, and this helps to reduce false alarms. Typically it is used in areas where we don’t expect to see tracks; for example, the central reservation of a motorway. Essentially, it stabilizes the Clutter Map and boosts the signal by amplifying the clutter data within a radar sample.
There are four steps:
Identify the Clutter.
Add a Threshold.
Add a Signal Gain (which is a multiplication of the signal, e.g. 25 x 2) or a Signal Offset (which is a fixed offset e.g. 25 + 20), or both:
Finally add a Signal Spread. For example, with a Signal Spread value of 1, if a clutter signal was 1 bin wide, then the spread would be 1 bin either side of the clutter signal:
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Threshold (pwr): This sets the threshold above which the radar samples are considered to be clutter as opposed to noise. This threshold is relative to the median signal strength at each range.
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