Secondary Radar/IFF anti-target splitting azimuth determiner

Details Secondary Radar/IFF anti-target splitting azimuth determiner Secondary Radar/IFF anti-target splitting azimuth determiner

1975-09-26

1977-09-13

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 5VQ, G01S 956

Patent

active

040486362

ABSTRACT:
The present invention determines the occurrence of leading and trailing es of a target under evaluation by an IFF system. A target's "leading edge" is declared when a predetermined number T.sub.L of correct replies is found to exist in a predetermined group of W.sub.L received replies in response to a number B of interrogations. A target's "trailing edge" is declared when a number T.sub.z of incorrect replies is found to exist in a group of W.sub.z replies if either at least a number B of interrogations have been transmitted after the target's "leading edge" has been declared, or a number T.sub.u of correct replies is found to exist in a group of W.sub.u received replies followed by reduction of this number T.sub.u to a smaller number T.sub.t.

REFERENCES:
patent: 3579237 (1971-05-01), Steingart et al.
patent: 3781881 (1973-12-01), Hovey

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