Helicopter recognition radar processor

Details Helicopter recognition radar processor Helicopter recognition radar processor

2006-07-18

2006-07-18

Sotomayor, John B. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Return signal controls radar system

Receiver

C342S192000, C342S193000, C342S196000

Reexamination Certificate

active

07079072

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.

REFERENCES:
patent: 4400700 (1983-08-01), Rittenbach
patent: 4737788 (1988-04-01), Kennedy
patent: 5376940 (1994-12-01), Abatzoglou

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