Alternative Formulations for the Fluctuating Two-Ray Fading Model

We present two alternative frameworks for the statistical characterization and performance evaluation of the fluctuating two-ray (FTR) fading model which simplify previous approaches. The new formulations are based on the fact that the FTR fading distribution can be described, for arbitrary m , as...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2022-11, Vol.21 (11), p.9404-9416
Main Authors: Olyaee, Maryam, Romero-Jerez, Juan M., Lopez-Martinez, F. Javier, Goldsmith, Andrea J.
Format: Article
Language:English
Subjects:
Analytical models
Business metrics
Closed form solutions
co-channel interference (CCI)
Cochannel interference
Computational modeling
Exact solutions
Fading
Fading channels
Fluctuating two-ray
Formulations
generalized MGF
incomplete generalized MGF
Integers
Measurement
multi-antenna
Nakagami-m
Performance evaluation
Probability density function
Probability density functions
Rayleigh channels
Rician shadowed
Statistical analysis
Wireless communication
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Summary:We present two alternative frameworks for the statistical characterization and performance evaluation of the fluctuating two-ray (FTR) fading model which simplify previous approaches. The new formulations are based on the fact that the FTR fading distribution can be described, for arbitrary m , as an underlying Rician Shadowed (RS) distribution with continuously varying parameter K_{r} (ratio of specular to diffuse power components), while for the special case of m being an integer, it is demonstrated that the FTR fading model can be described in terms of a finite number of underlying squared Nakagami- m distributions. It is shown that any performance metric that is computed by averaging over the probability density function (PDF) of the FTR fading model can be expressed in terms of a finite-range integral over the corresponding performance metric for the simpler RS (for arbitrary m ) or Nakagami- m (for integer m ) fading models, for which many results are available in closed-form. New expressions for some Laplace-domain statistics of interest are also obtained; these are used to analyze the outage probability of FTR fading under co-channel interference, as well as to obtain closed-form expressions for the main statistics of a composite wireless channel model encompassing FTR fading and shadowing.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2022.3176221