93 citations · 207 across the 17 of their papers we have counts for
20 papers
Frugal RIS-aided 3D Localization with CFO under LoS and NLoS Conditions
Yasaman Ettefagh, Musa Furkan Keskin, Kamran Keykhosravi +2
In this paper, we investigate 3-D localization and frequency synchronization with multiple reconfigurable intelligent surfaces (RISs) in the presence of carrier frequency offset (C…
Performance of RIS-Aided Nearfield Localization under Beams Approximation from Real Hardware Characterization
Moustafa Rahal, Benoit Denis, Kamran Keykhosravi +4
The technology of reconfigurable intelligent surfaces (RIS) has been showing promising potential in a variety of applications relying on Beyond-5G networks. Reconfigurable intellig…
RIS-Enabled and Access-Point-Free Simultaneous Radio Localization and Mapping
Hyowon Kim, Hui Chen, Musa Furkan Keskin +5
In the upcoming sixth generation (6G) of wireless communication systems, reconfigurable intelligent surfaces~(RISs) are regarded as one of the promising technological enablers, whi…
RIS-Enabled SISO Localization under User Mobility and Spatial-Wideband Effects
Kamran Keykhosravi, Musa Furkan Keskin, Gonzalo Seco-Granados +2
Reconfigurable intelligent surface (RIS) is a promising technological enabler for the 6th generation (6G) of wireless systems with applications in localization and communication. I…
Two-Timescale Transmission Design and RIS Optimization for Integrated Localization and Communications
Fan Jiang, Andrea Abrardo, Kamran Keykhoshravi +3
Reconfigurable intelligent surfaces (RISs) have tremendous potential to boost communication performance, especially when the line-of-sight (LOS) path between the user equipment (UE…
Constrained RIS Phase Profile Optimization and Time Sharing for Near-field Localization
Moustafa Rahal, Benoît Denis, Kamran Keykhosravi +3
The rising concept of reconfigurable intelligent surface (RIS) has promising potential for Beyond 5G localization applications. We herein investigate different phase profile design…
Leveraging RIS-Enabled Smart Signal Propagation for Solving Infeasible Localization Problems
Kamran Keykhosravi, Benoit Denis, George C. Alexandropoulos +4
Reconfigurable intelligent surfaces (RISs) have tremendous potential for both communication and localization. While communication benefits are now well-understood, the breakthrough…
Arbitrary Beam Pattern Approximation via RISs with Measured Element Responses
Moustafa Rahal, Benoît Denis, Kamran Keykhosravi +4
Smart radio environments (SREs) are seen as a key rising concept of next generation wireless networks, where propagation channels between transmitters and receivers are purposely c…
RIS-Enabled Self-Localization: Leveraging Controllable Reflections With Zero Access Points
Kamran Keykhosravi, Gonzalo Seco-Granados, George C. Alexandropoulos +1
Reconfigurable intelligent surfaces (RISs) are one of the most promising technological enablers of the next (6th) generation of wireless systems. In this paper, we introduce a nove…
RIS-Enabled Localization Continuity Under Near-Field Conditions
Moustafa Rahal, Benoit Denis, Kamran Keykhosravi +2
Reconfigurable intelligent surfaces (RISs) have the potential to enable user localization in scenarios where traditional approaches fail. Building on prior work in single-antenna R…
Beyond 5G RIS mmWave Systems: Where Communication and Localization Meet
Jiguang He, Fan Jiang, Kamran Keykhosravi +3
Upcoming beyond fifth generation (5G) communications systems aim at further enhancing key performance indicators and fully supporting brand new use cases by embracing emerging tech…
Multi-RIS Discrete-Phase Encoding for Interpath-Interference-Free Channel Estimation
Kamran Keykhosravi, Henk Wymeersch
Reconfigurable intelligent surfaces (RISs) are one of the foremost technological enablers of future wireless systems. They improve communication and localization by providing a str…
Semi-Passive 3D Positioning of Multiple RIS-Enabled Users
Kamran Keykhosravi, Musa Furkan Keskin, Satyam Dwivedi +2
Reconfigurable intelligent surfaces (RISs) are set to be a revolutionary technology in the 6th generation of wireless systems. In this work, we study the application of RIS in a mu…
SISO RIS-Enabled Joint 3D Downlink Localization and Synchronization
Kamran Keykhosravi, Musa Furkan Keskin, Gonzalo Seco-Granados +1
We consider the problem of joint three-dimensional localization and synchronization for a single-input single-output (SISO) system in the presence of a reconfigurable intelligent s…
Near-field Localization with a Reconfigurable Intelligent Surface Acting as Lens
Zohair Abu-Shaban, Kamran Keykhosravi, Musa Furkan Keskin +3
Exploiting wavefront curvature enables localization with limited infrastructure and hardware complexity. With the introduction of reconfigurable intelligent surfaces (RISs), new op…
How to Increase the Achievable Information Rate by Per-Channel Dispersion Compensation
Kamran Keykhosravi, Marco Secondini, Giuseppe Durisi +1
Deploying periodic inline chromatic dispersion compensation enables reducing the complexity of the digital back propagation (DBP) algorithm. However, compared with nondispersion-ma…
Exploiting AWG Free Spectral Range Periodicity in Distributed Multicast Architectures
Kamran Keykhosravi, Houman Rastegarfar, Nasser Peyghambarian +1
Modular optical switch architectures combining wavelength routing based on arrayed waveguide grating (AWG) devices and multicasting based on star couplers hold promise for flexibly…
Demodulation and Detection Schemes for a Memoryless Optical WDM Channel
Kamran Keykhosravi, Morteza Tavana, Erik Agrell +1
It is well known that matched filtering and sampling (MFS) demodulation together with minimum Euclidean distance (MD) detection constitute the optimal receiver for the additive whi…
Bounds on the Per-Sample Capacity of Zero-Dispersion Simplified Fiber-Optical Channel Models
Kamran Keykhosravi, Giuseppe Durisi, Erik Agrell
A number of simplified models, based on perturbation theory, have been proposed for the fiber-optical channel and have been extensively used in the literature. Although these model…
Rates Achievable on a Fiber-Optical Split-Step Fourier Channel
Kamran Keykhosravi, Erik Agrell, Giuseppe Durisi
A lower bound on the capacity of the split-step Fourier channel is derived. The channel under study is a concatenation of smaller segments, within which three operations are perfor…