64 citations · 64 across the 4 of their papers we have counts for
4 papers
Exploiting Mutual Coupling Characteristics for Channel Estimation in Holographic MIMO
Nikolaos Kolomvakis, Emil Björnson
Holographic multiple-input multiple-output (MIMO) systems represent a spatially constrained MIMO architecture with a massive number of antennas with small antenna spacing as a clos…
Spatial Frequencies and Degrees of Freedom: Their Roles in Near-Field Communications
Alva Kosasih, Özlem Tuğfe Demir, Nikolaos Kolomvakis +1
As wireless technology begins to utilize physically larger arrays and/or higher frequencies, the transmitter and receiver will reside in each other's radiative near field. This fac…
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…
Nonlinear Distortion Radiated from Large Arrays and Active Reconfigurable Intelligent Surfaces
Nikolaos Kolomvakis, Alva Kosasih, Emil Björnson
Extremely large aperture arrays (ELAAs) and reconfigurable intelligent surfaces (RISs) are candidate enablers to realize connectivity goals for the sixth-generation (6G) wireless n…