3 papers
cs.IT2024
RIS-Aided Unsourced Multiple Access (RISUMA): Coding Strategy and Performance Limits
Mohammad Javad Ahmadi, Mohammad Kazemi, Tolga M. Duman
This paper considers an unsourced random access (URA) set-up equipped with a passive reconfigurable intelligent surface (RIS), where a massive number of unidentified users (only a…
cs.IT2024
An ODMA-Based Unsourced Random Access Scheme with a Multiple Antenna Receiver
Mert Ozates, Mohammad Kazemi, Tolga M. Duman
We investigate the unsourced random access scheme assuming that the base station is equipped with multiple antennas, and propose a high-performing solution utilizing on-off-divisio…
cs.IT2023
Unsourced Random Access Using Multiple Stages of Orthogonal Pilots: MIMO and Single-Antenna Structures
Mohammad Javad Ahmadi, Mohammad Kazemi, Tolga M. Duman
We study the problem of unsourced random access (URA) over Rayleigh block-fading channels with a receiver equipped with multiple antennas. We propose a slotted structure with multi…