Search Results for author: Marzieh Najafi

Found 7 papers, 0 papers with code

100 Gbps Indoor Access and 4.8 Gbps Outdoor Point-to-Point LiFi Transmission Systems using Laser-based Light Sources

no code implementations25 Feb 2024 Cheng Cheng, Sovan Das, Stefan Videv, Adrian Spark, Sina Babadi, Aravindh Krishnamoorthy, Changmin Lee, Daniel Grieder, Kathleen Hartnett, Paul Rudy, James Raring, Marzieh Najafi, Vasilis K. Papanikolaou, Robert Schober, Harald Haas

In this paper, we demonstrate the communication capabilities of light-fidelity (LiFi) systems based on highbrightness and high-bandwidth integrated laser-based sources in a surface mount device (SMD) packaging platform.

Optical IRSs: Power Scaling Law, Optimal Deployment, and Comparison with Relays

no code implementations17 Mar 2023 Hedieh Ajam, Marzieh Najafi, Vahid Jamali, Robert Schober

We also consider the impact of linear, quadratic, and focusing phase shift profiles across the IRS on the power collected at the Rx lens for different IRS sizes.

Power Scaling Law for Optical IRSs and Comparison with Optical Relays

no code implementations5 May 2022 Hedieh Ajam, Marzieh Najafi, Vahid Jamali, Robert Schober

The line-of-sight (LOS) requirement of free-space optical (FSO) systems can be relaxed by employing optical relays and optical intelligent reflecting surfaces (IRSs).

Modeling and Design of IRS-Assisted Multi-Link FSO Systems

no code implementations31 Jul 2021 Hedieh Ajam, Marzieh Najafi, Vahid Jamali, Bernhard Schmauss, Robert Schober

Our simulation results validate the accuracy of the proposed analytical channel model for IRS-assisted FSO systems and confirm that this model is applicable for both large and intermediate IRS-receiver lens distances.

Intelligent Reflecting Surface-assisted Free-space Optical Communications

no code implementations13 May 2021 Vahid Jamali, Hedieh Ajam, Marzieh Najafi, Bernhard Schmauss, Robert Schober, H. Vincent Poor

Free-space optical (FSO) systems are able to offer the high data-rate, secure, and cost-efficient communication links required for applications such as wireless front- and backhauling for 5G and 6G communication networks.

Channel Modeling for IRS-Assisted FSO Systems

no code implementations1 Oct 2020 Hedieh Ajam, Marzieh Najafi, Vahid Jamali, Robert Schober

In this paper, we develop an analytical channel model for intelligent reflecting surface (IRS)-assisted free space optical (FSO) systems.

valid

Physics-based Modeling of Large Intelligent Reflecting Surfaces for Scalable Optimization

no code implementations5 Jun 2020 Marzieh Najafi, Vahid Jamali, Robert Schober, Vincent H. Poor

Based on this model, one can design the phase shifts of the unit cells of a tile offline for the support of several transmission modes and then select the best mode online for a given channel realization.

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