This paper investigates the performance of massive multiple-input multiple-output (MIMO)
cellular systems with pilot contamination. We derive a closed-form approximation of the area …

We formulate a power optimization problem for non-orthogonal multiple access systems
mathematically, and prove its NP-hardness. For tackling the problem, we first identify a …

This paper concerns with a relay-aided massive multiple input multiple output (MIMO)
cellular network. The exact closed-form expressions of both spectral efficiency (SE) and …

A 3D geological structural model is an approximation of an actual geological phenomenon.
Various uncertainty factors in modeling reduce the accuracy of the model; hence, it is …

This letter investigates joint power control and user clustering for downlink nonorthogonal
multiple access systems. Our aim is to minimize the total power consumption by taking into …

In this paper, we study the effect of optimal power allocation on the performance of
communication systems using hybrid-automatic repeat request (HARQ) protocols with a …

In wireless networks, the cooperative diversity is an implicit form of space diversity
commonly used when other conventional transmit diversity methods might not be practical. It …

THE demand on telecommunication networks is increasing rapidly, and wireless access is a
major contributor to this trend. On the other hand, wireless is considered to be the least …

In this paper, we study the problem of simultaneous information and power transfer in a
wireless multi-user, single hop network. Specifically, we develop an optimal resource …

Dramatic increase in wireless applications resulted in exponential data growth as well as
significant energy demands. In this work, we focus on developing techniques and …