Performanse dual-diversity sistema u uslovima korelisanih i neidentičnih fedinga u granama

Authors

  • Maja Ilić-Delibašić University of Montenegro
  • Milica Pejanović-Djurišić University of Montenegro

Keywords:

korelacija, BER, diversity

Abstract

U radu su analizirane BER (Bit Error Rate) performanse prijemnog diversity sistema sa dvije grane u uslovima postojanja korelacije fedinga diversity grana. Razmatrano je okruženje u kome se multipath efekat karakteriše prostiranjem signala po jednoj direktnoj i više reflektovanih putanja, tj. varijacijama anvelope primljenog signala koja se statisticki opisuje Rice-ovom raspodjelom. Analiza se odnosi na opšti slucaj, kada signali u pojedinim granama ne moraju imati identicne karakteristike srednjeg odnosa signal/šum i Rice-ovog K faktora. Zbog složenosti razmatranog okruženja i nemogucnosti primjene postojecih matematickih modela za analizu performansi diversity sistema, u radu je predložen model koji je zasnovan na linearnoj transformaciji korelisanih Rice-ovih slucajnih promjenljivih u nekorelisane. Na taj nacin je omogucena dalja primjena standardnih matematickih modela za analizu BER performansi. Analiza je sprovedena za razlicite metode kombinovanja primljenih diversity signala, i to MRC (Maximal Ratio Combining), EGC (Equal Gain Combining) i SSC (Switch and Stay Diversity Combining), i BPSK (Binary Phase Shift Keying) mapiranje ulaznih podataka.

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Published

23.03.2023

Issue

Vol. 19 No. 1 (2011)

Section

Articles

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