63 citations · 128 across the 13 of their papers we have counts for
3 papers · 1 filter
RIS-assisted Physical Layer Security
Xudong Li, Matthias Frey, Ehsan Tohidi +2
We propose a reconfigurable intelligent surface (RIS)-assisted wiretap channel, where the RIS is strategically deployed to provide a spatial separation to the transmitter, and orth…
Towards Bridging the Gap between Near and Far-Field Characterizations of the Wireless Channel
Navneet Agrawal, Ehsan Tohidi, Renato L. G. Cavalcante +1
The "near-field" propagation modeling of wireless channels is necessary to support sixth-generation (6G) technologies, such as intelligent reflecting surface (IRS), that are enable…
MIMO Systems with Reconfigurable Antennas: Joint Channel Estimation and Mode Selection
Fariba Armandoust, Ehsan Tohidi, Martin Kasparick +3
Reconfigurable antennas (RAs) are a promising technology to enhance the capacity and coverage of wireless communication systems. However, RA systems have two major challenges: (i)…