Process for the recognition of an aerial target from its radar e

Details Process for the recognition of an aerial target from its radar e Process for the recognition of an aerial target from its radar e

1991-11-08

1993-09-21

Barron, Jr., Gilberto

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

With particular circuit

Spectrum analysis

342 90, G01S 1352

Patent

active

052473074

ABSTRACT:
Process for the recognition of an aerial target from samples of its radar echoes. First, Doppler radar emission is transmitted in the direction of the target. A Doppler spectrum echo signal of the target is then detected. At the center of the signal, a principal line corresponding to the aircraft's velocity is detected. The distance between this principal line and secondary lines of the spectrum signal is then determined. From the value of this distance and the relative configuration of the spectrum signal, the target can be classified into a predetermined target category. In this step, in particular, at least one intrinsic parameter of the spectrum signal can be determined, e.g., the number of secondary lines, the intensity of the secondary lines relative to the principal line, the absolute intensity of these secondary lines with allowance for the distance of the target, the equivalent radar surface of the target. Based on these intrinsic parameters, a preliminary determination of the category of the target from among several predetermined categories can be made. The spectrum signal can also be compared to a number of reference series established previously and memorized in a library of spectra corresponding to known targets, and the reference spectra having the strongest intercorrelation with the spectrum signal of the signal received is then determined to correspond to the detected spectrum signal.

REFERENCES:
patent: 4348674 (1982-09-01), Muth et al.
patent: 4707697 (1987-11-01), Coulter et al.
A.G.A.R.D. Conference Proceedings No. 197 On New Devices, Techniques and Systems in Radar, 1977, O.T.A.N., pp. 16-1 to 16-9, G. Graf, "Radar Cross Section Analysis And Target Imaging From The Doppler Information In The Radar Echo".
ICASSP '88, M, vol. II, Multidimensional Signal Processing, New York, Apr. 11-14, 1984, pp. 1212-1215, D. H. Johnson, "Application Of The Hough Transform To Doppler-Time Image Processing".

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