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This article presents a thorough statistical analysis of the capacity of orthogonal space-time block coded (OSTBC) Nakagami-lognormal (NLN) multiple-input multipleoutput (MIMO) channels. The NLN channel model allows to study the joint effects of fast fading and shadowing on the statistical properties of the channel capacity. We have derived exact analytical expressions for the probability density...
In shared wireless medium access, receiver initiated busy burst (BB) transmission mitigates the problem of co-channel interference. Receiver feedback allows potential transmitters to ascertain the amount of interference their transmission would cause to victim receivers in adjacent communication links. The BB concept mitigates excessive co-channel interference, by maintaining an exclusion region around...
In this paper, we investigate an incremental opportunistic relaying scheme where the selected relay chooses to cooperate only if the source-destination channel is of an unacceptable quality. In our study, we consider regenerative relaying in which the decision to cooperate is based on a signal-to-noise ratio (SNR) threshold and takes into account the effect of the possible erroneously detected and...
The performance of multihop links is studied in this contribution by both analysis and simulations, when communicating over Generalized-K (KG) fading channels. The performance metrics considered include symbol error rate (SER), outage probability, level crossing rate (LCR) and average outage duration (AOD). First, the expressions for both the SER and outage probability are derived by approximating...
This paper addresses the problem of assessing the effect of communication delays on the control performance of a platoon of two vehicles. We consider Bluetooth communication and develop a simple stochastic model for the Bluetooth delay distribution. It is shown that due to the long tails of this distribution, the computation time of a Monte Carlo approach would be prohibitive when assessing the effect...
This article analyzes the statistical properties of narrowband mobile-to-mobile (M2M) fading channels with equal gain combining (EGC) under line-of-sight (LOS) propagation conditions. Here, we study a dual-hop amplify-and-forward (AF)relay network. It is assumed that there can exist LOS components in the transmission links between the source mobile station and the destination mobile station via K...
Exact average capacity results for L-branch coherent equal-gain combining (EGC) in correlated and uncorrelated fading channels are not known. This paper develops a novel framework (approach) for capacity analysis of L-branch EGC in generalized fading channels. In addition, Gamma shadowed generalized Nakagami-m fading model is proposed in order to statistically model the fading environments in high...
In the last years, several wireless standards have been profitably tested for possible application in factory communication systems, showing encouraging results even in time-critical applications. However, the achieved performance are clearly related to the specific applications considered and, more important, to the specific wireless components employed. In this paper, we consider the wireless extension...
In this paper, we introduce the most general composite fading distribution to model the envelope and the power of the received signal in such fading channels as millimeter wave (60 GHz or above) fading channels and free-space optical channels, which we term extended generalized-K (EGK) composite fading distribution. We obtain the second-order statistics of the received signal envelope characterized...
In this paper, we investigate a dual-hop opportunistic decode-and-forward relaying scheme where the source may or not be able to communicate directly with the destination. We first derive statistics based on exact probability density function (PDF) of each hop. Then, the PDFs are used to determine closed-form outage probability expression for a transmission rate R. Furthermore, we evaluate the asymptotic...
Selecting the best relay among all the relays ready to cooperate saves system resources and utilizes the available bandwidth more efficiently compared to the regular all-relay cooperation. This scheme also achieves the same or better system performance in terms of outage probability and diversity order. In this paper, we analyze the performance of the best relay selection scheme with fixed gain relays...
In this work, we propose the κ-μ/gamma composite distribution. Specifically, we start by formulating the κ-μ/gamma and consequently derive a closed-form expression for its envelope probability density function (pdf). The κ-μ distribution includes as special cases the Nakagami-n (Rice), Nakagami-m, Rayleigh and one-sided Gaussian distributions.
In this work, we propose the η-μ/gamma composite distribution. Specifically, we start by formulating the η-μ/gamma and consequently derive a closed-form expression for its envelope probability density function (pdf). Importantly, the η-μ distribution includes as special cases the Nakagami-q (Hoyt), Nakagami-m, Rayleigh and one-side Gaussian distributions. As a consequence, the useful models, Nakagami-m/gamma,...
In this paper, based on a two-concentric-quasi-sphere 3-D M-M geometrical model via pondering the uniform elevation angle (EA) probability density function (pdf), the closed-form expression of the 3-D M-M wideband space-time-frequency cross-correlation function (STF-CF) with uniform circular array (UCA) configuration is derived. The STF-CF with distinct values of the maximum EA regarding propagation...
The statistical properties of the capacity of narrowband double Hoyt fading channels are studied. Toward this end, analytical expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the instantaneous channel capacity process are derived. Furthermore, for the characterization of the dynamical behavior of the time-varying channel capacity, expressions are...
The capacity of multiple input multiple output (MIMO) system over wireless channels has been investigated analytically and by simulation over different types of wireless fading channels, such as Rayleigh, Ricain and Nakagami fading channels. This paper paper first investigates the channel capacity of the MIMO channels over the Rayleigh-Lognormal fading channel. The paper derives the analytic expression...
The analysis of scalability of wireless sensornetworks is a challenging performance issue. In this paper,we employ an analytical method based on probabilitydensity function Signal-to-Interference-plus-Noise-Ratio(SINR) of links to evaluate the performance of a wirelesssensor network in terms of bit-error-rate (BER). We derivean analytical formula for the average of BER according tothe physical resources...
In this paper, we investigate the performance of selection cooperation in the presence of channel estimation errors. In particular, we consider a cooperative scenario with multiple relays and amplify-and-forward protocol over frequency flat fading channels. In the selection scheme, only the "best" relay which maximizes the effective signal-to-noise ratio (SNR) at the receiver end is selected...
In this paper the problem of detecting the channel state between LOS and NLOS conditions is addressed using UWB signals. A new distribution-based identification approach is proposed and its performance is compared with that of other classic schemes. To this purpose experimental data collected in realistic environments have been used.
In this article, we have studied the statistical properties of the capacity of Nakagami-m channels when spatial diversity combining, such as maximal ratio combining (MRC) and equal gain combining (EGC), is employed at the receiver. The presented results provide insight into the statistical properties of the channel capacity under a wide range of fading conditions in wireless links using L-branch diversity...
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