Virtual noise radar waveform for reduced radar detectability

Details Virtual noise radar waveform for reduced radar detectability Virtual noise radar waveform for reduced radar detectability

G - Physics

01

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G01S 7/282 (2006.01) G01S 7/36 (2006.01) G01S 13/22 (2006.01) G01S 13/32 (2006.01) G01S 7/285 (2006.01) G01S 7/35 (2006.01) G01S 13/02 (2006.01) G01S 13/44 (2006.01)

Patent

CA 2255890

Apparatus (10) for generating a radar waveform (W). A noises generator (20) generates a series of pulses in a pseudo-random pattern, and a frequency generator (16) generates a carrier wave having a frequency within a predetermined band of frequencies. The carrier wave is modulated with the pseudo-random pattern of pulses, and the resulting modulated carrier wave passed through both a filter (30) and an attenuator (32) to suppress any discernible feature or signal characteristics of the resulting waveform. The modulated carrier is transmitted by an antenna (42) and a received return signal is processed by a signal processor (100) to obtain pertinent information about a target. The transmitted waveform has no discernible attributes by which the waveform, if processed and analyzed by someone else's radar detector (E) would convey any intelligence as to the presence or source of the transmitted waveform.

L'invention concerne un dispositif (10) à onde radar (W). Un générateur de bruit (20) fournit une série d'impulsions de forme pseudo-aléatoire, et un générateur de fréquence (16) fournit une porteuse dont la fréquence est dans une bande prédéterminée. Une fois modulée par les impulsions pseudo-aléatoires, la porteuse traverse à la fois un filtre (30) et un atténuateur (32) afin de supprimer toute fonction ou caractéristique de signal discernable dans l'onde résultante. Cette porteuse modulée est transmise par une antenne (42), et le signal reçu en retour est traité par un processeur de signaux (100) pour donner les données pertinentes relatives à une cible. L'onde transmise n'a aucun attribut discernable permettant à un autre détecteur radar (E), qui effectuerait le traitement et l'analyse de l'onde, de fournir le moindre renseignement sur la présence ou la source de l'onde transmise.

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