Detekcija i procena parametara nepoznatih radarskih signala s proširenim spektrom / Detection and parameter estimation of spread spectrum radar signals in non-cooperative context

• Main Author: Slobodan Simić
• Format: Article
• Language: English
• Published: University of Defence in Belgrade 2007-01-01
• Series: Vojnotehnički Glasnik
• Subjects: LPI radar; osetljivost prijemnika; procesno pojačanje; TB proizvod; receiver sensitivity; processing gain; TB product
• Online Access: http://scindeks.ceon.rs/Article.aspx?artid=0042-84690701050S
• ISSN: 0042-8469; 2217-4753

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). / 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.