Tehnički vjesnik, Vol. 23 No. 6, 2016.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20140909142128
Level crossing rate of SC receiver over gamma shadowed Weibull multipath fading channel
Suad Suljović
; Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Dragana Krstić
orcid.org/0000-0002-2579-3911
; Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Srdjan Maričić
orcid.org/0000-0002-9261-7061
; Faculty of Industrial Management, University Union Belgrade, Kosančićev venac 2, 11000 Belgrade, Serbia
Srboljub Zdravković
; Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Vladeta Milenković
; Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Mihajlo Stefanović
; Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Sažetak
The wireless telecommunication system consisting of selection combining (SC) receiver which works in Gamma shadowed Weibull multiple-faded channel is discussed in this work. The received signal suffers Weibull small scale fading which leads in variation of the signal envelope and Gamma large scale fading which results in variation of the SC receiver output signal envelope power. SC receiver is utilized to abate the impact of Gamma large scale fading effects and Weibull small scale fading effects on system characteristics. The formula for average level crossing rate (LCR) of signal envelope at SC combiner output is performed in the closed shape. The result we get can be applied to calculate the average fade duration (AFD) of such wireless systems. The obtained solutions are plotted in a few graphs to point out the impact of Weibull fading envelope severity parameter and Gamma shadowing severity parameter on system features.
Ključne riječi
Gamma shadowing; level crossing rate (LCR); selection combining (SC); Weibull fading
Hrčak ID:
169338
URI
Datum izdavanja:
29.11.2016.
Posjeta: 2.321 *