7 citations · 8 across the 15 of their papers we have counts for
6 papers · 1 filter
Simultaneous Direct and Indirect Channel Estimation for RIS-Assisted MIMO Communications
Daniel V. C. de Oliveira, Daniel C. Alcantara, Fazal. E Asim +2
This paper introduces an enhanced channel estimation method for reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output (MIMO) communications. Considering…
Q-SPARSE: Quantum Subspace Projection for Near-Field Angle-Range Spectrum Estimation
Mostafizur Rahaman Laskar, Sajad Daei, Gabor Fodor +1
Near-field wavefront curvature enables joint angle-range localization, but exploiting it entails repeated covariance-eigenspace tests over a two-dimensional spherical manifold. We…
A Mathematical Theory of Near-Field Super-Resolution
Sajad Daei, Gabor Fodor, Mikael Skoglund
Finite-aperture near-field sensing leads to a super-resolution geometry fundamentally different from the translation-invariant Fourier setting. In the Fresnel regime, wavefront cur…
Rethinking Channel Charting: A Graph Perspective
Yifei Jin, Yuxin Zhao, Dandan Hao +1
Channel charting is a self-supervised framework that learns low-dimensional spatial representations from high-dimensional channel state information. We revisit channel charting fro…
Convexity Meets Curvature: Lifted Near-Field Super-Resolution
Sajad Daei, Gábor Fodor, Mikael Skoglund
Extra-large apertures, high carrier frequencies, and integrated sensing and communications (ISAC) are pushing array processing into the Fresnel region, where spherical wavefronts i…
On the Impact of Channel Aging and Doppler-Affected Clutter on OFDM ISAC Systems
Steven Rivetti, Gabor Fodor, Emil Björnson +1
The temporal evolution of the propagation environment plays a central role in integrated sensing and communication (ISAC) systems. A slow-time evolution manifests as channel aging…