Investigation into diversity order at micro and/or macro level in gamma shadowed Nakagami‐<i>m</i> fading channels

Sekulović, Nikola M.; Panajotović, Aleksandra S.; Drača, Dragan Lj.; Stefanović, Mihajlo; Bandjur, Milos

doi:10.1002/jnm.2288

Cited by 3 publications

(1 citation statement)

References 23 publications

(39 reference statements)

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“…Furthermore, the first-order statistics of hybrid dual-hop FSO REC communications assisted by RF link are investigated in References 26,27. Although the papers by Miridakis and Tsiftsis and Boluda-Ruiz et al 28,29 have investigated different diversity techniques for application in cooperative FSO REC systems, the best path selection diversity at reception due to its relatively easier implementation is one of the most investigated and applied techniques by researchers. [30][31][32][33][34] The first-order statistical measures are important performance criteria in wireless communications. On the other hand, the second-order statistics such as level crossing rate (LCR) and average fade duration (AFD) are useful performance criteria and crucial for designing communication systems in highly dynamical time-variant fading channels.…”

Section: Introductionmentioning

confidence: 99%

Outage statistics of double gamma–gamma random process and its application to cooperative optical wireless communication relay systems

Dejanovic¹,

Dubljanin²,

Kontrec³

et al. 2021

Int J Numerical Modelling

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This article investigates outage statistics of double gamma-gamma random variable (RV) modeled as the product of two independent and identically distributed gamma-gamma RVs. The outage closed-form statistics in terms of the first-order statistical measures (probability density function and cumulative distribution function) and the second-order statistical measures (level crossing rate and average fade duration) by Laplace approximation integral (LAI) and exponential LAI are derived. The statistical results are directly related to the performance evaluation of dual-hop as well as cooperative dual-hop optical wireless communications over moderate to strong turbulence-induced fading channels.

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Section: Introductionmentioning

confidence: 99%

Outage statistics of double gamma–gamma random process and its application to cooperative optical wireless communication relay systems

Dejanovic¹,

Dubljanin²,

Kontrec³

et al. 2021

Int J Numerical Modelling

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Evaluation of Statistics for Macrodiversity Systems Under the Influence of Specific Single Shadowing and Complex Fading

Milic

Krstić

Stefanović

et al. 2019

J CIRCUIT SYST COMP

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Wireless signals often propagate in spaces containing large and small obstacles that affect the quality of such radiation. Obstacles cause a nonnegligible loss of the propagated power. The degradation of the signal quality is described by introducing fading and shadowing effects. A case of a wireless communication system that consists of a macro-level component represented by the selection combiner (SC) and two micro-level components consisting of the maximal ratio combiners (MRC) with [Formula: see text] branches is studied in this paper. The MRC component assumes the presence of a single-base station. The received signal is disturbed by simultaneous impact of the multipath Nakagami-[Formula: see text] fading and gamma shadowing. Consequently, the envelope is described by generalized-[Formula: see text] density function. On the other hand, SC component assumes the presence of two base stations, where the average power of the received signal is described using gamma distribution. The exact closed-form expression is obtained for probability density function of the signal at the output of the system, followed by the corresponding outage probability (Pout). Calculations are depicted graphically expressing influences of different fading values as well as the signal parameters.

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MIMO Systems in a Composite Fading and Generalized Noise Scenario: A Review

Tiwari¹

2021

ENG

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: Multiple-input multiple-output (MIMO) systems have been endorsed to enable future wireless communication requirements. The efficient system designing appeals an appropriate channel model, that considers all the dominating effects of wireless environment. Therefore, some complex or less analytically acquiescent composite channel models have been proposed typically for single-input single-output (SISO) systems. These models are explicitly employed for mobile applications, though, we need a specific study of a model for MIMO system which can deal with radar clutters and different indoor/outdoor and mobile communication environments. Subsequently, the performance enhancement of MIMO system is also required in such scenario. The system performance enhancement can be examined by low error rate and high capacity using spatial diversity and spatial multiplexing respectively. Furthermore, for a more feasible and practical system modeling, we require a generalized noise model along with a composite channel model. Thus, all the patents related to MIMO channel models are revised to achieve the near optimal system performance in real world scenario. This review paper offers the methods to improve MIMO system performance in less and severe fading as well as shadowing environment and focused on a composite Weibull-gamma fading model. The development is the collective effects of selecting the appropriate channel models, spatial multiplexing/detection and spatial diversity techniques both at the transmitter and the receivers in the presence of arbitrary noise.

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Investigation into diversity order at micro and/or macro level in gamma shadowed Nakagami‐m fading channels

Cited by 3 publications

References 23 publications

Outage statistics of double gamma–gamma random process and its application to cooperative optical wireless communication relay systems

Outage statistics of double gamma–gamma random process and its application to cooperative optical wireless communication relay systems

Evaluation of Statistics for Macrodiversity Systems Under the Influence of Specific Single Shadowing and Complex Fading

MIMO Systems in a Composite Fading and Generalized Noise Scenario: A Review

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