Helicopter recognition radar processor
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United States of America Patent
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Jul 18, 2006
Grant Date -
N/A
app pub date -
Jan 23, 1987
filing date -
Jan 23, 1987
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A radar processor is disclosed for processing the radar return samples from a Doppler radar receiver to discriminate helicopter targets from fixed-wing targets. The radar processor defines the spectral components of the radar return components due to the helicopter rotor hub as the 'signal' component; and the spectral components due to the target skin, ground clutter and white noise as the 'noise' component. The radar processor implements the Neyman Pearson criterion to calculate a detection statistic. Whether the calculated detection statistic exceeds a threshold determines whether a 'helicopter presents' or a 'helicopter absent' target condition is declared. The radar processor utilizes helicopter rotor hub reflected signals, and requires only a few milliseconds on target, and may therefore be readily implemented by scanning surveillance systems.
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