Method for detecting and classifying helicopters

Details Method for detecting and classifying helicopters Method for detecting and classifying helicopters

1986-08-11

1993-07-27

Tubbesing, T. H.

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

With particular circuit

Spectrum analysis

G01S 735

Patent

active

052314022

ABSTRACT:
To detect and classify a helicopter as a target by means of a radar system equipped with a Doppler filter bank, an initial determination is made as to whether the threshold value has been exceeded in a substantial number of the individual filters of the Doppler filter bank, and if so, the width of that amplitude band delimited by the highest and lowest amplitudes of the filter output signals is determined and a decision regarding the presence of a helicopter target is derived from the width of the amplitude band.

REFERENCES:
patent: 4241350 (1980-12-01), Uffelman
patent: 4275396 (1981-06-01), Jacomini
patent: 4348674 (1982-09-01), Muth et al.
patent: 4389647 (1983-06-01), Fanuele et al.
patent: 4536764 (1985-08-01), Freeman
patent: 4719606 (1988-01-01), Andrieu
patent: 5081459 (1992-01-01), Guillerot

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