992 research outputs found
Corrections to "Unified Laguerre polynomial-series-based distribution of small-scale fading envelopes''
In this correspondence, we point out two typographical errors in Chai and
Tjhung's paper and we offer the correct formula of the unified Laguerre
polynomial-series-based cumulative distribution function (cdf) for small-scale
fading distributions. A Laguerre polynomial-series-based cdf formula for
non-central chi-square distribution is also provided as a special case of our
unified cdf result.Comment: 2 pages, to be published in the IEEE Transactions on Vehicular
Technology as a Correspondenc
A Comprehensive Analysis of 5G Heterogeneous Cellular Systems operating over - Shadowed Fading Channels
Emerging cellular technologies such as those proposed for use in 5G
communications will accommodate a wide range of usage scenarios with diverse
link requirements. This will include the necessity to operate over a versatile
set of wireless channels ranging from indoor to outdoor, from line-of-sight
(LOS) to non-LOS, and from circularly symmetric scattering to environments
which promote the clustering of scattered multipath waves. Unfortunately, many
of the conventional fading models adopted in the literature to develop network
models lack the flexibility to account for such disparate signal propagation
mechanisms. To bridge the gap between theory and practical channels, we
consider - shadowed fading, which contains as special cases, the
majority of the linear fading models proposed in the open literature, including
Rayleigh, Rician, Nakagami-m, Nakagami-q, One-sided Gaussian, -,
-, and Rician shadowed to name but a few. In particular, we apply an
orthogonal expansion to represent the - shadowed fading
distribution as a simplified series expression. Then using the series
expressions with stochastic geometry, we propose an analytic framework to
evaluate the average of an arbitrary function of the SINR over -
shadowed fading channels. Using the proposed method, we evaluate the spectral
efficiency, moments of the SINR, bit error probability and outage probability
of a -tier HetNet with classes of BSs, differing in terms of the
transmit power, BS density, shadowing characteristics and small-scale fading.
Building upon these results, we provide important new insights into the network
performance of these emerging wireless applications while considering a diverse
range of fading conditions and link qualities
Extended Generalized-K (EGK): A New Simple and General Model for Composite Fading Channels
In this paper, we introduce a generalized composite fading distribution
(termed extended generalized-K (EGK)) to model the envelope and the power of
the received signal in millimeter wave (60 GHz or above) and free-space optical
channels. We obtain the first and the second-order statistics of the received
signal envelope characterized by the EGK composite fading distribution. In
particular, expressions for probability density function, cumulative
distribution function, level crossing rate and average fade duration, and
fractional moments are derived. In addition performance measures such as amount
of fading, average bit error probability, outage probability, average capacity,
and outage capacity are offered in closed-form. Selected numerical and computer
simulation examples validate the accuracy of the presented mathematical
analysis.Comment: Composite fading distribution, generalized-K distribution,
probability density function, cumulative distribution function, fractional
moments, level crossing rate, amount of fade duration, moments, amount of
fading, average bit error probability, average capacit
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