46 citations · 59 across the 8 of their papers we have counts for
8 papers
Performance Analysis of LEO-Terrestrial Systems in Presence of Doppler Effect
Islam M. Tanash, Nuria Gonzalez-Prelcic, Risto Wichman
In this paper, we present a novel stochastic geometry-based approach to analyze the effect of residual Doppler shift on orthogonal frequency-division multiple access (OFDMA) system…
Statistical Modeling for Accurate Characterization of Doppler Effect in LEO-Terrestrial Networks
Islam M. Tanash, Risto Wichman, Nuria Gonzalez-Prelcic
Low Earth Orbit (LEO) satellite communication is a promising solution for global wireless coverage, especially in underserved and remote areas. However, the high relative velocity…
Urban RIS-Assisted HAP Networks: Performance Analysis Using Stochastic Geometry
Islam M. Tanash, Ayush Kumar Dwivedi, Taneli Riihonen
This paper studies a high-altitude platform (HAP) network supported by reconfigurable intelligent surfaces (RISs). The practical irregular placement of HAPs and RISs is modeled usi…
Integrating RIS into HAP Networks for Improved Connectivity
Islam M. Tanash, Ayush Kumar Dwivedi, Taneli Riihonen
This paper investigates a high-altitude platform (HAP) network enhanced with reconfigurable intelligent surfaces (RISs). The arbitrary placement of HAPs and RISs is modeled using s…
Enhancing HAP Networks with Reconfigurable Intelligent Surfaces
Islam M. Tanash, Ayush Kumar Dwivedi, Fatemeh Rafiei Maleki +1
This paper presents and analyzes a reconfigurable intelligent surface (RIS)-based high-altitude platform (HAP) network. Stochastic geometry is used to model the arbitrary locations…
3D Reconfigurable Intelligent Surfaces for Satellite-Terrestrial Networks
Islam M. Tanash, Risto Wichman
This paper proposes a three-dimensional (3D) satellite-terrestrial communication network assisted with reconfigurable intelligent surfaces (RISs). Using stochastic geometry models,…
Improved Coefficients for the Karagiannidis-Lioumpas Approximations and Bounds to the Gaussian Q-Function
Islam M. Tanash, Taneli Riihonen
We revisit the Karagiannidis-Lioumpas (KL) approximation of the Q-function by optimizing its coefficients in terms of absolute error, relative error and total error. For minimizing…
Global Minimax Approximations and Bounds for the Gaussian Q-Function by Sums of Exponentials
Islam M. Tanash, Taneli Riihonen
This paper presents a novel systematic methodology to obtain new simple and tight approximations, lower bounds, and upper bounds for the Gaussian Q-function, and functions thereof,…