9 papers · 1 filter
Living Off the Grid: Continuous Range-Angle Super-Resolution for Near-Field XL-MIMO
Sajad Daei, Gabor Fodor, Mikael Skoglund
Near-field extremely large multiple input multiple output (XL-MIMO) breaks the assumptions that make classical super-resolution effective: the receiver acquires only a limited set…
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…
One Target, Many Views: Multi-User Fusion for Collaborative Uplink ISAC
Sajad Daei, Gabor Fodor, Mikael Skoglund
We propose a novel pilot-free multi-user uplink framework for integrated sensing and communication (ISAC) in mm-wave networks, where single-antenna users transmit orthogonal freque…
When Near Becomes Far: From Rayleigh to Optimal Near-Field and Far-Field Boundaries
Sajad Daei, Gabor Fodor, Mikael Skoglund
The transition toward 6G is pushing wireless communication into a regime where the classical plane-wave assumption no longer holds. Millimeter-wave and sub-THz frequencies shrink w…
Near-Field ISAC in 6G: Addressing Phase Nonlinearity via Lifted Super-Resolution
Sajad Daei, Amirreza Zamani, Saikat Chatterjee +2
Integrated sensing and communications (ISAC) is a promising component of 6G networks, fusing communication and radar technologies to facilitate new services. Additionally, the use…
Improved Downlink Channel Estimation in Time-Varying FDD Massive MIMO Systems
Sajad Daei, Mikael Skoglund, Gabor Fodor
In this work, we address the challenge of accurately obtaining channel state information at the transmitter (CSIT) for frequency division duplexing (FDD) multiple input multiple ou…