Search Results for author: Kamran Keykhosravi

Found 4 papers, 2 papers with code

Multi-RIS Discrete-Phase Encoding for Interpath-Interference-Free Channel Estimation

no code implementations13 Jun 2021 Kamran Keykhosravi, Henk Wymeersch

We take into consideration the limited resolution of the RIS phase shifters and show that in the presence of this practical limitation, orthogonal phase profiles can be designed based on Butson-type Hadamard matrices.

Semi-Passive 3D Positioning of Multiple RIS-Enabled Users

no code implementations25 Apr 2021 Kamran Keykhosravi, Musa Furkan Keskin, Satyam Dwivedi, Gonzalo Seco-Granados, Henk Wymeersch

In this work, we study the application of RIS in a multi-user passive localization scenario, where we have one transmitter (Tx) and multiple asynchronous receivers (Rxs) with known locations.

SISO RIS-Enabled Joint 3D Downlink Localization and Synchronization

1 code implementation4 Nov 2020 Kamran Keykhosravi, Musa Furkan Keskin, Gonzalo Seco-Granados, Henk Wymeersch

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 surface (RIS), equipped with a uniform planar array.

Signal Processing Information Theory Information Theory

Near-field Localization with a Reconfigurable Intelligent Surface Acting as Lens

1 code implementation12 Oct 2020 Zohair Abu-Shaban, Kamran Keykhosravi, Musa Furkan Keskin, George C. Alexandropoulos, Gonzalo Seco-Granados, Henk Wymeersch

Exploiting wavefront curvature enables localization with limited infrastructure and hardware complexity.

Signal Processing Information Theory Information Theory

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