11 citations · 17 across the 15 of their papers we have counts for
6 papers · 1 filter
Channel Modeling for IRS-Assisted FSO Systems
Hedieh Ajam, Marzieh Najafi, Vahid Jamali +1
In this paper, we develop an analytical channel model for intelligent reflecting surface (IRS)-assisted free space optical (FSO) systems. Unlike IRS-assisted radio frequency system…
Power Efficiency, Overhead, and Complexity Tradeoff in IRS-Assisted Communications -- Quadratic Phase-Shift Design
Vahid Jamali, Marzieh Najafi, Robert Schober +1
In this paper, we focus on large intelligent reflecting surfaces (IRSs) and propose a new codebook construction method to obtain a set of predesigned phase-shift configurations for…
Physics-based Modeling of Large Intelligent Reflecting Surfaces for Scalable Optimization
Marzieh Najafi, Vahid Jamali, Robert Schober +1
In this paper, we develop a physics-based model that allows a scalable optimization of large intelligent reflecting surfaces (IRSs). The basic idea is to partition the IRS unit cel…
Intelligent Reflecting Surfaces for Free Space Optical Communications
Marzieh Najafi, Bernhard Schmauss, Robert Schober
In this paper, we investigate the use of intelligent reflecting surfaces (IRSs) to relax the line-of-sight requirement of free space optical (FSO) systems. Considering a Gaussian l…
Physics-based Modeling and Scalable Optimization of Large Intelligent Reflecting Surfaces
Marzieh Najafi, Vahid Jamali, Robert Schober +1
Intelligent reflecting surfaces (IRSs) have the potential to transform wireless communication channels into smart reconfigurable propagation environments. To realize this new parad…
Ergodic Sum Rate Analysis of UAV-Based Relay Networks with Mixed RF-FSO Channels
Hedieh Ajam, Marzieh Najafi, Vahid Jamali +1
Unmanned aerial vehicle (UAV)-based communications is a promising new technology that can add a wide range of new capabilities to the current network infrastructure. Given the flex…