14 papers
From Relevance to Validity: Zero-Shot Tool Selection via Functional and Contextual Validation
Xiaoxuan Dong, Jin Zhang, Zichen Yuan +11
Large language model (LLM) agents increasingly face tasks from unseen domains and execution contexts, making zero-shot tool selection essential for identifying tools that can satis…
Transceiver Design for Cell-Free Unsourced Random Access
Mert Ozates, Mohammad Kazemi, Eduard Jorswieck +1
We propose a low-complexity, energy-efficient solution for cell-free unsourced random access (URA), in which multiple distributed access points are connected to a central processin…
Cluster-Aware Over-the-Air Federated Learning with Energy-Harvesting Devices: From Global Training to Model Personalization
Furkan Bagci, Busra Tegin, Mohammad Kazemi +1
Federated learning (FL) enables distributed optimization and learning across decentralized edge devices while preserving data privacy, but its performance is fundamentally constrai…
Fully Asynchronous Unsourced Random Access over Fading Channels
Mert Ozates, Mohammad Kazemi, Gianluigi Liva +1
We examine unsourced random access in a fully asynchronous setup, where active users transmit their data without restriction on the start time over a fading channel. In the propose…
Learned Digital Over-the-Air Computing for Federated Edge Learning
Antonio Tarizzo, Mohammad Kazemi, Deniz Gündüz
Over-the-air (OTA) aggregation enables federated edge learning (FEEL) by exploiting the superposition property of the wireless channel to merge communication with computation, elim…
Communication via Sensing
Mohammad Kazemi, Tolga M. Duman, Deniz Gündüz
We present an alternative take on the recently popularized concept of `\textit{joint sensing and communications}', which focuses on using communication resources also for sensing.…
Efficient Feedback Design for Unsourced Random Access with Integrated Sensing and Communication
Mohammad Javad Ahmadi, Mohammad Kazemi, Rafael F. Schaefer
We consider an unsourced random access (URA) system enhanced with a feedback mechanism that serves both communication and sensing tasks. While traditional URA systems do not incorp…
A Fully Asynchronous Unsourced Random Access Scheme
Mert Ozates, Mohammad Kazemi, Gianluigi Liva +1
We investigate fully asynchronous unsourced random access (URA), and propose a high-performing scheme that employs on-off division multiple access (ODMA). In this scheme, active us…
Characterization of Deletion/Substitution Channel Capacity for Small Deletion and Substitution Probabilities
Mohammad Kazemi, Tolga M. Duman
We consider binary input deletion/substitution channels, which model certain types of synchronization errors encountered in practice. Specifically, we focus on the regime of small…
Update Estimation and Scheduling for Over-the-Air Federated Learning with Energy Harvesting Devices
Furkan Bagci, Busra Tegin, Mohammad Kazemi +1
We study over-the-air (OTA) federated learning (FL) for energy harvesting devices with heterogeneous data distribution over wireless fading multiple access channel (MAC). To addres…
ODMA-Based Cell-Free Unsourced Random Access with Successive Interference Cancellation
Mert Ozates, Mohammad Kazemi, Eduard Jorswieck +1
We consider the unsourced random access problem with multiple receivers and propose a cell-free type solution for that. In our proposed scheme, the active users transmit their sign…
Unsourced Random Access: A Comprehensive Survey
Mert Ozates, Mohammad Javad Ahmadi, Mohammad Kazemi +2
Multiple access communication systems enable numerous users to share common communication resources, playing a crucial role in wireless networks. With the emergence of the sixth ge…
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…
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…