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This paper proposes a novel cluster-based geometrical dynamic stochastic model for multi-input and multi-output (MIMO) communication environments. It is assumed that the base station (BS) has an adaptive learning ability and the BS preprocesses the received data in advance. In the proposed channel model, scatterers can be clustered into different clusters based on a machine learning cluster algorithm...
In this paper, the cellular mobile communication system with microdiversity and macrodiversity reception operating over Gamma shadowed Weibull multipath fading environment is analyzed. Macrodiversity selection combining (SC) receiver reduces Gamma long term fading effects and three microdiversity SC receivers mitigate Weibull short term fading effects on the system performance. The useful closed form...
Inter-frequency scan (IFS) is a process performed by the user equipment (UE) to discover small cells in heterogeneous networks (HetNets) for high data rate and boosting the spectral efficiency. It is anticipated that the role of IFS will have a significant impact on the quality of service (QoS) and the energy efficiency in the future cellular systems. In this paper, a framework is presented to model...
A new (Beaulieu-Xie) fading model was recently proposed to describe line-of-sight and non-line-of-sight components in wireless channels. In this work, we consider both outage probability and error rate performance of selective combining over this new fading channel model with arbitrary channel correlation. Closed-form expressions are obtained for asymptotically tight upper and lower bounds. The analytical...
Location information is playing a significant role in nowadays mobile applications. Performing indoor localization with existing WiFi infrastructure and smartphone motion sensor through statistical filtering has been proven to be a feasible solution. Many literature have resorted to particle filters to deal with the multi-modal and non-Gaussian problem associated with the filtering process. Although...
Heterogeneous cellular network has become an important network architecture to improve network spectral efficiency. This paper works on a theoretical framework for analyzing outage probability and spectral efficiency in a two-tier heterogeneous network with joint processing cooperation. The heterogeneous network consists of high power nodes (HPNs) and low power nodes (LPNs). A range expansion association...
This paper investigates the asymptotic behaviour (error and outage probabilities) of a single cell multiple-input multiple-output (MIMO) system aided by a large scale antenna array. Specifically, the uplink transmission over composite fading channel with power-scaling scheme is considered. Where, most reported studies in this respect discuss the case of downlink scenario for convenience MIMO systems...
Recent standards for wireless networks introduced spatial and frequency diversity to improve the quality and the bandwidth of the wireless communications. The arising channel state information has been exploited for the wireless localization of device-free targets. In this work, a principal component analysis has been applied to the channel state information in order to extract a target-dependent...
Beckmann distribution is a versatile mathematical model, which can be applied in performance analyses of radio frequency communications, free-space optical communications and underwater optical communications. However, the cumulative distribution function (CDF) of Beckmann distribution does not have a closed-form expression, which makes it challenging to derive closed-form outage probability expression...
In this article, the design of secure lattice coset codes for general wireless channels with fading and Gaussian noise is studied. Recalling the eavesdropper's probability and information bounds, a variant of the latter is given from which it is explicitly seen that both quantities are upper bounded by (increasing functions of) the expected flatness factor of the faded lattice related to the eavesdropper...
In this paper, we investigate the performance of cooperative amplify-and-forward (AF) multi-relay networks with relay selection strategy over independent and identically distributed (i.i.d.) Nakagami-m fading channels. In this system we study multiuser cooperative relaying to have a secure transmission from source to destination, since transmitted information may be wiretapped by multiple eavesdroppers...
The Gamma-Gamma distribution has recently emerged in a number of applications ranging from modeling scattering and reverbation in sonar and radar systems to modeling atmospheric turbulence in wireless optical channels. In this respect, assessing the outage probability achieved by some diversity techniques over this kind of channels is of major practical importance. In many circumstances, this is intimately...
Covert systems are designed to operate at a low probability of detection (LPD) in order to provide system protection at the physical layer level. The classical approach to covert communications hides the signal in noise; however, the increasing demand for modern covert systems that provides better protection against intercept receivers (IRs) has shifted the focus to the design of Ad-Hoc covert networks...
Small cell deployments are one of the most significant long-term strategic policies of the mobile network operators since small cell architecture delivers not only the required capacity boost but also the flexibility important for immensely-localized deployments in high-traffic environments. In HetNets, small cells serve as offloading spots in the radio access network to offload users and their associated...
In this paper, we analyze the first-order (FO) statistics of two new geometry-based statistical models for small-scale nonstationary time-frequency (TF) dispersive mobile-to-mobile (M2M) fading channels. We derive exact analytic expressions for the joint and marginal probability density functions (PDFs) of the envelope and phase of both models. In addition, we analyze the asymptotic behavior of these...
Wireless communication system operating over Gamma shadowed multipath fading channel in the presence of cochannel interference subjected to small scale fading is delineated in this paper. Desired signal experiences Gamma long term fading, k-µ short term fading and cochannel interference affected by k-µ multipath fading. In interference limited environment, the signal to interference ratio (SIR) for...
Wireless communication relay radio system with two sections is described in this paper. In the first section, signal envelope is described with K-μ distribution and in the second section signal envelope is modeled by using η-μ distribution. Probability density function (PDF) and cumulative distribution function (CDF) of minimum of signal envelopes at sections are calculated. Then, the outage probabilities...
In this paper, a comparison between different indicators for wireless channels profile identifications, is presented. The comparison is made by employing the Reverberating Chamber (RC), a natural wireless channel emulator that physically replicates real-world multipath channel conditions. The comparison between different wireless indicators focuses on the enhancing the mobile communication, on the...
The railway fading channel has a significant impact on the design of wireless communication systems for railways. In this paper we present a general stochastic fading channel model based on a large body of measurements performed in railways at 930 MHz. Measurements allow a characterization of the variations of the channel fading behaviors, and the developed empirical model ensures a straightforward...
In this paper, we investigate the outage behavior of the LTE-A relay system subject to the non- identical Rician fading. For the case of decode- and-forward (DF) relaying without the direct link, a closed-form formulas is derived. Moreover, for the case of DF relaying with the direct link, an exact expression in series is derived. Furthermore, a closed-form formula is derived for the situation where...
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