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2016, vol. 64, br. 2, str. 353-382
Prototip višeučesničkog sistema baziranog na prijemnicima sa korelatorima ili mašinom podržavajućih vektora
The University of Auckland, ECE Department, New Zealand

e-adresas.berber@auckland.ac.nz
Ključne reči: haotični komunikacioni sistemi; SVM i korelatorski prijemnik; CDMA sistemi; DSR razvoj CDMA sistema
Sažetak
Tehnike višeučesničkih komunikacija sa kodnom raspodelom kanala (CDMA) koriste se u modernim bežičnim mrežama kao što su mobilne radio-telefonske mreže i bežične senzorske mreže. Razvoj prenosa signala na fizičkom nivou u ovim mrežama zasnovan je na primeni binarnih sekvenci za proširenje signala i primeni korelatorskih prijemnika. U ovom radu prikazan je razvoj primopredajnika za prenos CDMA signala korišćenjem nove komunikacione metode zasnovane na primeni haotičnih sekvenci za proširenje signala, čime se može povećati zaštita u prenosu poruka u sistemu, i razvojem nove tehnike detekcije signala korišćenjem mašina sa podržavajućim vektorima u prijemniku (SVM prijemnik) i tradicinalno korišćenog korelatorskog prijemnika. Oba razvijena prijemnika su teorijski analizirana, uključujući izvode izraza za verovatnoću greške bita u zatvorenom obliku u slučaju kanala sa fedingom, a zatim je izvršena njihova implementacja u digitalnoj tehnologiji (DSP) na 32-bitnoj procesorskoj platformi TigerSHARC. Poređenje ova dva sistema pokazalo je da rešenje sa mašinom sa podržavajućim vektorima (SVM prijemnik) poboljšava robustnost sistema po cenu smanjenja brzine procesiranja. Međutim, ostvarljivi protok bita kod prijemnika sa korelatorom bio je dva puta veći nego kod prijemnika koji koristi mašinu sa podržavajućim vektorima.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/vojtehg64-8899
objavljen u SCIndeksu: 27.04.2016.
metod recenzije: dvostruko anoniman
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