Correlated Phenomena in Wireless Communications: A Copula Approach

Livieratos, Spiros N.; Voulkidis, Artemis; Chatzarakis, George E.; Cottis, Panayotis G.

doi:10.1007/978-3-319-04720-1_6

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…In this regard, the empirical data analysis shows that the Clayton copula is one of the most popular Archimedean copulas which can perfectly describe any specific non-zero level of low tail dependency between individual RVs. Hence, since the outage of transmission often occurs in deep fading conditions (i.e., tail dependence) over wireless communication systems [24], we here exploit the Clayton copula to describe the structure of dependency between correlated fading channel coefficients and generate the corresponding joint CDF. Our analytical and numerical results will reveal that this choice is justified since it can offer good mathematical tractability and accurately describe the impact of spatial correlation between the FA ports in the considered multiuser communication setup.…”

Section: A Statistical Characterizationmentioning

confidence: 99%

Fluid Antenna-Assisted Dirty Multiple Access Channels Over Composite Fading

Rostami Ghadi,

Wong,

López-Martínez

et al. 2024

IEEE Commun. Lett.

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This letter investigates the application of the emerging fluid antenna (FA) technology in multiuser communication systems when side information (SI) is known at the transmitters. We consider a K-user dirty multiple access channel (DMAC) with non-causally known SI at the transmitters, where K users send independent messages to a common receiver with a FA capable of changing its location depending on the channel condition. By connecting Jakes' model to copula theory through Spearman's ρ rank correlation coefficient, we accurately describe the spatial correlation between the FA channels, and derive a closed-form expression for the outage probability (OP) under Fisher-Snedecor F fading. Results confirm that a FA-aided receiver can achieve better performance in multiuser communication: (i) increasing the number of FA ports as well as FA size can significantly lower the OP; (ii) FA can support a large number of users using only one FA at the common receiver in a few wavelengths of space.

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Section: A Statistical Characterizationmentioning

confidence: 99%

Fluid Antenna-Assisted Dirty Multiple Access Channels Over Composite Fading

Rostami Ghadi,

Wong,

López-Martínez

et al. 2024

IEEE Commun. Lett.

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Copula-Based Analysis of Power Allocation for Two-Sensor Composite Fading MAC With Dependent Channel Coefficients

Mohajeran

Hodtani

2021

IEEE Systems Journal

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Performance Analysis of SWIPT Relay Networks Over Arbitrary Dependent Fading Channels

Rostami Ghadi,

López-Martínez

2024

IEEE Trans. Commun.

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In this paper, we investigate the impact of fading channel correlation on the performance of dual-hop decode-andforward (DF) simultaneous wireless information and power transfer (SWIPT) relay networks. More specifically, by considering the power splitting-based relaying (PSR) protocol for the energy harvesting (EH) process, we quantify the effect of positive and negative dependency between the source-to-relay (SR) and relayto-destination (RD) links on key performance metrics such as ergodic capacity and outage probability. To this end, we first represent general formulations for the cumulative distribution function (CDF) of the product of two arbitrary random variables, exploiting copula theory. This is used to derive the closed-form expressions of the ergodic capacity and outage probability in a SWIPT relay network under correlated Nakagami-m fading channels. Monte-Carlo simulation results are provided to validate the correctness of the developed analytical results, showing that the system performance significantly improves under positive dependence in the SR-RD links, compared to the case of negative dependence and independent links. Results further demonstrate that the efficiency of the ergodic capacity and outage probability ameliorates as the fading severity reduces for the PSR protocol.

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Correlated Phenomena in Wireless Communications: A Copula Approach

Cited by 3 publications

References 7 publications

Fluid Antenna-Assisted Dirty Multiple Access Channels Over Composite Fading

Fluid Antenna-Assisted Dirty Multiple Access Channels Over Composite Fading

Copula-Based Analysis of Power Allocation for Two-Sensor Composite Fading MAC With Dependent Channel Coefficients

Performance Analysis of SWIPT Relay Networks Over Arbitrary Dependent Fading Channels

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