48 research outputs found
Performance Analysis of Project-and-Forward Relaying in Mixed MIMO-Pinhole and Rayleigh Dual-Hop Channel
In this letter, we present an end-to-end performance analysis of dual-hop
project-and-forward relaying in a realistic scenario, where the source-relay
and the relay-destination links are experiencing MIMO-pinhole and Rayleigh
channel conditions, respectively. We derive the probability density function of
both the relay post-processing and the end-to-end signal-to-noise ratios, and
the obtained expressions are used to derive the outage probability of the
analyzed system as well as its end-to-end ergodic capacity in terms of
generalized functions. Applying then the residue theory to Mellin-Barnes
integrals, we infer the system asymptotic behavior for different channel
parameters. As the bivariate Meijer-G function is involved in the analysis, we
propose a new and fast MATLAB implementation enabling an automated definition
of the complex integration contour. Extensive Monte-Carlo simulations are
invoked to corroborate the analytical results.Comment: 4 pages, IEEE Communications Letters, 201
On the Performance of MIMO FSO Communications over Double Generalized Gamma Fading Channels
A major performance degrading factor in free space optical communication
(FSO) systems is atmospheric turbulence. Spatial diversity techniques provide a
promising approach to mitigate turbulence-induced fading. In this paper, we
study the error rate performance of FSO links with spatial diversity over
atmospheric turbulence channels described by the Double Generalized Gamma
distribution which is a new generic statistical model covering all turbulence
conditions. We assume intensity modulation/direct detection with on-off keying
and present the BER performance of single-input multiple-output (SIMO),
multiple-input single-output (MISO) and multiple-input multiple-output (MIMO)
FSO systems over this new channel model.Comment: 6 Pages, 4 figure, IEEE ICC conference 201
Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems
In this work, the performance analysis of a dual-hop relay transmission
system composed of asymmetric radio-frequency (RF)/free-space optical (FSO)
links with pointing errors is presented. More specifically, we build on the
system model presented in [1] to derive new exact closed-form expressions for
the cumulative distribution function, probability density function, moment
generating function, and moments of the end-to-end signal-to-noise ratio in
terms of the Meijer's G function. We then capitalize on these results to offer
new exact closed-form expressions for the higher-order amount of fading,
average error rate for binary and M-ary modulation schemes, and the ergodic
capacity, all in terms of Meijer's G functions. Our new analytical results were
also verified via computer-based Monte-Carlo simulation results.Comment: 6 pages, 3 figure