In this letter, we consider a network assisted by multiple reconfigurable intelligent surfaces (RISs). Assuming that the RIS with highest instantaneous end-to-end signal-to-noise ratio (SNR) is selected to aid communication, outage probability (OP) and average sum-rate are investigated. Specifically, an exact analysis for OP developed. addition, relying on extreme value theory, closed-form expression asymptotic derived, based which capacity scaling law established. Our results corroborated...

In this paper, we develop a unified theoretical framework for analyzing the outage performance of reconfigurable intelligent surfaces (RISs)-assisted communication systems over generalized fading channels and in presence phase noise. Fox’s H function theory is then utilized to derive probability various channel noise distributions closed-form. We further conduct an asymptotic analysis obtain insightful findings. particular, present maximum diversity order achievable such demonstrate...

This letter provides a unified performance analysis of secure reconfigurable intelligent surface (RIS)-assisted communications in the presence discrete phase shifts. In particular, we derive exact secrecy outage probability non-colluding and colluding eavesdroppers, obtain corresponding diversity orders. Moreover, analytical expressions average rate different scaling laws with sufficiently large signal-to-noise ratio number RIS elements are derived. Simulation results corroborate our...

Leveraging on the reconfigurable intelligent surface (RIS) paradigm for enabling next Internet of Things (IoT) and 6G era, this paper develops a comprehensive theoretical framework characterizing performance RIS-assisted communications in plethora propagation environments. We derive unified mathematical models outage probability ergodic capacity single multiple-element RIS over Fox's H fading channel, which includes as special cases nearly all linear non multi-path shadowing adopted open...

This letter investigates the error probability of reconfigurable intelligent surfaces (RIS)-enabled communication systems with quantized channel phase compensation. Exact and asymptotic bit rate (BER) expressions are derived assuming different practical environments presence direct link. The theoretical frameworks findings validated aid Monte Carlo simulations.

This paper presents an analytical framework for performance evaluation of mobile radio systems operating in composite fading/shadowing channels the presence colocated co-channel interference. The desired user and interferers are subject to Nakagami fading superimposed on gamma shadowing. starts by presenting generic closed-form expressions signal-to-interference ratio (SIR) probability density function (pdf). From this pdf, outage probability, average bit error rate channel capacity obtained...

In this paper, we study consumer preferences for olive oil across four countries (Denmark, France, Tunisia, and the US). Based on a large-scale with consumers (N = 3,462), use Best-Worst Scaling method to measure perceived importance product attributes known influence choice. Our results show that all rate type, price, prior experience, country of origin as important attributes. On other hand, packaging, label design, brands are considered less While differs countries, order is almost...

Statistical characterization of the signal-tointerference-plus-noise ratio (SINR) via its cumulative distribution function is ubiquitous in a vast majority technical contributions area cellular networks, since it boils down to averaging Laplace transform aggregate interference, benefit accorded at expense confinement simplistic Rayleigh fading. In this paper, capture diverse fading channels that arise realistic outdoor/indoor wireless communication scenarios, we tackle problem differently....

In this letter, we investigate the performance of reconfigurable intelligent surface (RIS)-aided networks in presence non-identically distributed interferers at destination. A mathematical framework is proposed to statistically characterize cascaded channels and evaluate terms outage probability (OP) average bit error rate (BER). The high signal-to-interference-plus-noise ratio (SINR) analysis reduces easy-to-compute expressions for BER, which reveals inside information system design. We...

The terahertz (THz) waves with enormous bandwidth can be used along the existing sub-6GHz and millimeter wave (mmWave) bands to achieve ever evolving ecosystem of applications that need supported by modern wireless networks. This paper investigates a user-centric dynamic base station (BS) clustering design for hybrid network where THz, mmWave, BSs coexist. Invoking proposed model, BS cooperation within each band is made possible considering long term channel variations all surrounding...

This letter presents a unified analytical framework for the computation of ergodic capacity and outage probability relay-assisted mixed FSO/RF transmission. In addition to accounting different FSO detection techniques, mathematical model offers twofold unification systems by considering Málaga-M/κ-μ shadowed fading, which includes as special cases nearly all linear turbulence/fading models adopted in open literature.

In this paper, we introduce the Inverse Gaussian (IG) fading distribution to model envelope and power of received signal in radio propagation channels free-space optical (FSO) channels. The joint IG process its derivative marginal are developed. obtained formulas then used derive second-order statistics channel capacity under Nakagami-IG (NIG) distributions. Numerical results sustaining our analysis provided, impacts various parameters on system performance investigated.

In millimeter wave (mmWave) networks, base stations (BSs) are expected to be densely deployed in order meet the demands of mobile users. A major challenge dense mmWave networks is interference experienced by user from neighboring BSs which limits density BSs. promising solution this adopt user-centric BS cooperation that allows a connected set (cluster) instead being associated with single one. paper, we investigate performance dynamic clustering. First, propose clustering model enable...

A novel distribution referred to as N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">*</sub> generalized K, constructed the product of statistically independent, but not necessarily identically distributed, K random variables (RVs) is introduced. Statistical characterization proposed carried out via derivation closed-form expressions for its moment generating, probability density, cumulative and functions. Using obtained formulas, we present...

An analytical characterization of the ergodic capacity interference-limited multihop wireless networks with amplify-and forward (AF) relaying is presented. In our analysis, we consider that transmissions are performed over Nakagami-m fading where channel state information only known at receiving terminals. We derive an exact expression for by exploiting moment generating function (MGF) inverse signal-to-interference ratio (SIR). The result applicable arbitrary numbers interfering signals...

In this paper, we consider multi-aperture multiuser dual-hop amplify-and-forward (AF) free-space optical/radio frequency (FSO/RF) communication systems where the FSO and RF links, respectively, experience Málaga M-distribution Nakagami-m fading. Moreover, effect of co-channel interference is considered at users. Under assumption transmit aperture selection source opportunistic scheduling destination, derive exact expression for ergodic capacity in terms bivariate Meijer's-G function....

This paper develops an innovative approach to the modeling and analysis of downlink cellular networks with device-to-device (D2D) transmissions. The analytical embodiment signal-to-noise and-interference ratio in general fading channels is unified due H-transform theory, a taxonomy never considered before stochastic geometry-based network analysis. proposed framework has potential, versatility Fox's H functions, significantly simplifying cumbersome procedure representation D2D coverage,...

In this letter, we consider a dual-hop cooperative network assisted by multiple reconfigurable intelligent surfaces (RISs). Assuming that the RIS with highest instantaneous end-to-end signal-to-noise ratio (SNR) is selected to aid communication, outage probability (OP) and average sum-rate are investigated. Specifically, an exact analysis for OP developed. addition, relying on extreme value theory, closed-form expressions asymptotic derived, based which capacity scaling law established. Our...

Integrating relaying techniques into cellular communications sheds new light on higher capacity and broader coverage. However, applying in practice has to take account important issues such as co-channel interference (CCI). In this work, a generalized framework for the ergodic analysis of dual-hop fixed-gain amplify forward (AF) systems presence is presented. New expressions are derived considering transmissions over independent but not necessarily identically distributed Nakagami-m fading...

In this paper, we study the performance of mixed free space optical (FSO)-radio frequency (RF) multi-user relay network with aperture selection and opportunistic user scheduling in presence Poisson field interference. The considered system includes multiple sources (apertures), one amplify-andforward (AF) relay, users. source is connected node through FSO links users RF a interference at FSO-RF channels are assumed to follow Málaga-M/shadowed κ-μ fading models pointing errors on links. Exact...

We investigate the performance of mixed free-space optical (FSO)/millimeter-wave (mmWave) relay networks with interference at destination. The FSO/mmWave channels are assumed to follow Málaga-M/generalized-K fading models pointing errors in FSO link. H-transform theory, wherein integral transforms involve Fox's H-functions as kernels, is embodied unifying analysis framework that encompasses closed-form expressions for outage probability, average bit error rate (BER), and capacity. By virtue...

This paper presents an outage analysis of wireless systems operating in gamma-shadowed Nakagami-faded environments where the desired signal also suffers from co-channel interference. The interfering signals are subject to fading and shadowing. Based on obtained interference ratio (SIR) probability density function (pdf), closed- form expressions for both cases statistically identical interferers multiple with different parameters. effects aforementioned performance metric reuse distance...

In this letter, we analyze the ergodic capacity of a two-hop multiple-antenna amplify and forward (AF) system, where relay is subject to co-channel interference (CCI) while destination corrupted by additive white Gaussian noise (AWGN) only. A novel integral transform, called complementary moment generating function transform (CMGF), proposed as unified tool compute capacity. When both perform maximum ratio combining (MRC), derive new analytical exact expression for It shown that better...

Statistical characterization of the signal-to-noise ratio (SNR) reconfigurable intelligent surface (RIS)-assisted communications in presence phase noise is an important open issue. In this letter, we exploit concept copula modeling to capture non-standard dependence features that appear due discrete noise. particular, consider outage probability RIS systems Rayleigh fading channels and provide joint distributions characterize dependencies use finite resolution shifters at RIS. Numerical...

In this paper, infinite integrals involving the product of Bessel functions different arguments are solved in closed-form. The obtained solutions form a framework for error probability analysis wireless amplify and forward (AF) systems with an arbitrary number variable-gain relays operating over independent but not necessarily identical Nakagami-m fading channels. Here we show that can be described by generalized hypergeometric functions, namely, Gauss's Lauricella's multivariate functions....