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2007, vol. 55, br. 1, str. 50-64
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Detekcija i procena parametara nepoznatih radarskih signala s proširenim spektrom
Detection and parameter estimation of spread spectrum radar signals in non-cooperative context
Vojna akademija, Beograd
Ključne reči: LPI radar; osetljivost prijemnika; procesno pojačanje; TB proizvod
Keywords: LPI radar; receiver sensitivity; processing gain; TB product
Sažetak
U ovom radu je presretanje radarskih signala s proširenim spektrom upoređeno sa presretanjem konvencionalnih impulsnih radarskih signala. Prema literaturi [1-3] i iz izloženih primera može se zaključiti da novi presretački prijemnici moraju imati poboljšanu osetljivost za 10-30 dB, kako bi uspešno konkurisali novim radarskim sistemima s malom verovatnoćom presretanja. Jedan od načina na koji se to može postići jeste upotreba vrlo usmerenih antena, s visokim dobitkom. Digitalna obrada signala je drugi način poboljšanja osetljivosti. U radu je prikazan pregled postojećih algoritama za detekciju i procenu parametara nepoznatih radarskih signala sa proširenim spektrom. Dve najznačajnije grupe algoritama su: koherentne metode (predetection processing) i kroskorelacione metode (interferometarske).
Abstract
In this paper the specialties in interception of spread spectrum radar signals are exposed in regard interception of conventional pulsed radar signals. According to [1-3] and exposed examples it follow that future intercept receivers need 10-30 db selectivity enhancement to cope with modern LPI radar systems. One way is to use narrow beam, high gain antennas. Another way is trough signal processing. There is a review of existing algorithms in detection and parameter estimation of spread spectrum radar signals in non-cooperative context. Coherent methods and cross-correlation methods are put in the focus.
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