64 citations · 102 across the 31 of their papers we have counts for
7 papers · 1 filter
On Broad-Beam Reflection for Dual-Polarized RIS-Assisted MIMO Systems
Parisa Ramezani, Maksym A. Girnyk, Emil Björnson
The use of a reconfigurable intelligent surface (RIS) for aiding user-specific transmission has been widely explored. However, little attention has been devoted to utilizing RIS fo…
An Efficient Modified MUSIC Algorithm for RIS-Assisted Near-Field Localization
Parisa Ramezani, Alva Kosasih, Emil Björnson
In this paper, we consider a single-anchor localization system assisted by a reconfigurable intelligent surface (RIS), where the objective is to localize multiple user equipments (…
Enabling 6G Performance in the Upper Mid-Band by Transitioning From Massive to Gigantic MIMO
Emil Björnson, Ferdi Kara, Nikolaos Kolomvakis +3
The initial 6G networks will likely operate in the upper mid-band (7-24 GHz), which has decent propagation conditions but underwhelming new spectrum availability. In this paper, we…
MSE Minimization in RIS-Aided MU-MIMO with Discrete Phase Shifts and Fronthaul Quantization
Parisa Ramezani, Yasaman Khorsandmanesh, Emil Björnson
In this paper, we consider a downlink multi-user multiple-input multiple-output (MU-MIMO) communication assisted by a reconfigurable intelligent surface (RIS) and study the precodi…
Near-Field Localization and Sensing with Large-Aperture Arrays: From Signal Modeling to Processing
Zhaolin Wang, Parisa Ramezani, Yuanwei Liu +1
The signal processing community is currently witnessing a growing interest in near-field signal processing, driven by the trend towards the use of large aperture arrays with high s…
Joint Discrete Precoding and RIS Optimization for RIS-Assisted MU-MIMO Communication Systems
Parisa Ramezani, Yasaman Khorsandmanesh, Emil Björnson
This paper considers a multi-user multiple-input multiple-output (MU-MIMO) system where the downlink communication between a base station (BS) and multiple user equipments (UEs) is…
Localization in Massive MIMO Networks: From Near-Field to Far-Field
Parisa Ramezani, Özlem Tuğfe Demir, Emil Björnson
Source localization is the process of estimating the location of signal sources based on the signals received at different antennas of an antenna array. It has diverse applications…