Titre du document / Document title
A spectrally clean transmitting system for solid- state phased-array radars
Auteur(s) / Author(s)
FAUST Hugh H.
(1) ;
CONNOLLY Brian
(1) ;
FIRESTONE Todd M.
(1) ;
CHEN Richard C.
(1) ;
CANTRELL Ben H.
(1) ;
MOKOLE Eric L.
(1) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Naval Research Laboratory Attn: Hugh Faust, Code 5344 4555 Overlook ave., S.W, Washington, D.C. 20375-5336, ETATS-UNIS
Résumé / Abstract
Navy Radar operations are being curtailed in a littoral environment. This is due to two factors: The encroachment of the cell phone systems into the Navy radar bands and in-band interference from other radars. The Spectral width of most pulsed radars is significantly wider than necessary with the present modulation schemes. Most radars utilize some form of constant envelope pulse with phase or frequency modulation. This causes the spectrum to broaden several times the information bandwidth. If both the amplitude and phase of the transmitted signal are allowed to change a significantly narrower bandwidth can be achieved. In this paper a method to create waveforms with instantaneous bandwidths of 20 MHz confined within -100 dB are presented. The theoretical spectral results of three popular phase modulation schemes (phase shift keying, minimum phase shift keying, and derivative phase shift keying) are compared with the spectrally clean results. In addition the Chireix out-phasing method is presented as an alternative to generating amplitude and phase modulated waveforms. The Chireix method provides a way of improving the efficiency compared to the conventional class A power amplifier. Preliminary results are shown for a spectrally clean waveform.
Source / Source
Congrès
Proceedings of the 2004 IEEE Radar Conference :
(
April 26 to April 29 Wyndham Philadelphia at Franklin Plaza, Philadelphia, Pennsylvania
)
IEEE Radar Conference, Philadelphia PA
, ETATS-UNIS
(2004)
2004
, pp. 140-144[Note(s) : 1 vol.(XXVII-627 p.), ] [Document : 5 p.] (4 ref.), [Notes: "IEEE Catalog Number: 04CH37509"--T.p. verso]
ISBN 0-7803-8234-X ;
Illustration : Illustration
;
Langue / Language
Anglais
Editeur / Publisher
IEEE, Piscataway, NJ, ETATS-UNIS
(2004)
(Monographie)
Mots-clés anglais / English Keywords
Power amplifier ;
Performance evaluation ;
Amplitude modulation ;
Minimum shift keying ;
Phase shift keying ;
Theoretical study ;
Frequency modulation ;
Phase modulation ;
Pulse radar ;
Radar interference ;
Coastal zone ;
Phased array radar ;
Mots-clés français / French Keywords
Amplificateur puissance ;
Evaluation performance ;
Modulation amplitude ;
Modulation déplacement minimum ;
Modulation déplacement phase ;
Etude théorique ;
Modulation fréquence ;
Modulation phase ;
Radar impulsion ;
Interférence radar ;
Zone côtière ;
Radar réseau commande phase ;
Mots-clés espagnols / Spanish Keywords
Amplificador potencia ;
Evaluación prestación ;
Modulación amplitud ;
Modulación desplazamiento mínimo ;
Modulación desplazamiento fase ;
Estudio teórico ;
Modulación frecuencia ;
Modulación fase ;
Radar impulsos ;
Zona costera ;
Localisation / Location
INIST-CNRS, Cote INIST : Y 38776, 35400013873550.0260
Nº notice refdoc (ud4) : 17726822
