10 papers
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…
Optimal QAM Constellation for Over-the-Air Computation in the Presence of Heavy-Tailed Channel Noise
Saeed Razavikia, Deniz Gündüz, Carlo Fischione
Over-the-air computation (OAC) enables low-latency aggregation over multiple-access channels (MACs) by exploiting the superposition property of the wireless medium to compute funct…
Function Computation Over Multiple Access Channels via Hierarchical Constellations
Saeed Razavikia, Mohammad Kazemi, Deniz Gündüz +1
We study function computation over a Gaussian multiple-access channel (MAC), where multiple transmitters aim at computing a function of their values at a common receiver. To this e…
Learned Digital Codes for Over-the-Air Computation in Federated Edge Learning
Antonio Tarizzo, Mohammad Kazemi, Deniz Gündüz
Federated edge learning (FEEL) enables wireless devices to collaboratively train a centralised model without sharing raw data, but repeated uplink transmission of model updates mak…
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…
Towards Optimal Constellation Design for Digital Over-the-Air Computation
Saeed Razavikia, Deniz Gündüz, Carlo Fischione
Over-the-air computation (OAC) has emerged as a key technique for efficient function computation over multiple-access channels (MACs) by exploiting the waveform superposition prope…