Abstract
The $\alpha $ - $\eta $ - $\kappa $ - $\mu $ fading model is a very useful instrument to accurately describe various radio wave propagation scenarios. In this paper, we study the effective throughput performance of communication systems over the $\alpha $ - $\eta $ - $\kappa $ - $\mu $ fading channels. Novel and exact expressions for the effective throughput over $\alpha $ - $\eta $ - $\kappa $ - $\mu $ channels are derived, and the effective throughput of multiple-input single-output (MISO) and multiple-input multiple-output (MIMO) systems over some widely used small-scale fading models are presented based on the derived results. To obtain more understandings on the impact of physical channel characteristics and system configuration on the effective throughput, closed-form expressions for the asymptotic effective throughput at high signal-to-noise ratio (SNR) regimes are also obtained. The results reveal the underlying connections between different physical channel parameters (e.g., scattering level, phase correlation, channel nonlinearity, multipath clustering, and channel imbalance) and the effective throughput. It is found that the effective throughput improves with the increase of channel nonlinearity and number of multipath clusters, and the high-SNR slope is only dependent on the channel nonlinearity and the number of multipath clusters present in the physical channel.
Highlights
The well-established Shannon ergodic capacity was derived under the assumption that there exists no delay for the communication system
It is worth mentioning that since the sum of some specific random variable (RV) still exactly or approximately follows the distribution that can be well described by the α-η-κ-μ model, the obtained results on effective throughput for those fading distributions can be straightforwardly extended to the case with multiple-input single-output (MISO) or multiple-input multiple-output (MIMO) configurations
Following, based on the obtained analytical results for α-η-κ-μ fading channel, we present the results on the effective throughput of a MIMO-OSTBC system over Rayleigh fading channels and a MISO system over Nakagami-m and α-μ fading channels
Summary
The well-established Shannon ergodic capacity was derived under the assumption that there exists no delay for the communication system. Despite the many advantages of the α-η-κ-μ model, to the best of authors’ knowledge, the effective throughput performance of communication systems over this useful fading channel has not been investigated yet. Motivated by the above facts, we investigate the effective throughput performance of wireless systems over α-η-κ-μ fading channels by deriving the exact expression of effective throughput and conducting asymptotic analysis in this paper. Using (3) and (4), the exact expression for the effective throughput of communication systems over the investigated α-η-κ-μ fading channel is obtained as. Substituting (11) into (6) and after some simple algebraic operations, we obtain the novel and exact expression for the effective throughput of wireless systems over α-η-κ-μ fading as given in (12), as shown at the bottom of the page
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