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Analytical performance analysis of the M2M wireless link with an antenna selection system over interference limited dissimilar composite fading environments

Ðošić Danijel, Milić Dejan, Kontrec Nataša, Stefanović Časlav, Milosavljević Srðan, Stefanović Dušan M.

International Journal of Applied Mathematics and Computer Science

2022

Vol. 32, no. 4

569--582

This paper considers direct mobile-to-mobile (M2M) communications with a dual antenna selection (AS) system at a destination mobile node (DMN) in interference limited, dissimilar composite fading environments. In particular, we model dissimilar interference limited signals at the inputs of the dual branch AS system as (i) the ratio of two Nakagami-m (N) random variables (RVs) at the first branch and (ii) the ratio of two Rice RVs at the second branch, in order to account for non line-of-sight (NLOS) and line-of-sight (LOS) communications, respectively. Moreover, we assume variable powers of the desired as well as interference signals at the output of the DMN in order to account for the impact of shadowing. For the proposed model, we derive probability density functions, cumulative distribution functions, outage probabilities and average level crossing rates. The derived statistical results are evaluated for all the statistical measures considered and are graphically presented in order to provide insight into the impact of composite fading severities and LOS factors for the desired signal, as well as for the interference, on the system performances.

Product of Three Random Variables and its Application in Relay Telecommunication Systems in the Presence of Multipath Fading

Krstic Dragana, Nikolic Petar, Aleksic Danijela, Minic Sinisa, Vuckovic Dragan, Stefanovic Mihajlo

Journal of Telecommunications and Information Technology

2019

nr 1

83--92

In this paper, the product of three random variables (RVs) will be considered. Distribution of the product of independent random variables is very important in many applied problems, including wireless relay telecommunication systems. A few of such products of three random variables are observed in this work: the level crossing rate (LCR) of the product of a Nakagami-m random variable, a Rician random variable and a Rayleigh random variable, and of the products of two Rician RVs and one Nakagami-m RV is calculated in closed forms and presented graphically. The LCR formula may be later used for derivation of average fade duration (AFD) of a wireless relay communication radio system with three sections, working in the multipath fading channel. The impact of fading parameters and multipath fading power on the LCR is analyzed based on the graphs presented.

Overview of Fading Channel Modeling

Noga K. M., Pałczyńska B.

International Journal of Electronics and Telecommunications

2010

Vol. 56, No. 4

339-344

VisSim and LabVIEW based approaches are proposed and implemented to demonstrate fading in the communication systems. The introduction to fading, models for flat fading like Rayleigh, Weibull, Nakagami-m and the results of simulations are presented.