1 code implementation • 27 Sep 2023 • Henrik Hellström, Saeed Razavikia, Viktoria Fodor, Carlo Fischione
The fundamental idea of OAC is to exploit signal superposition to compute functions of multiple simultaneously transmitted signals.
no code implementations • 21 Feb 2022 • Mohammad Bokaei, Saeed Razavikia, Arash Amini, Stefano Rini
In this paper, we study the problem of estimating the direction of arrival (DOA) using a sparsely sampled uniform linear array (ULA).
no code implementations • 31 Oct 2022 • Saeed Razavikia, Jaume Anguera Peris, Jose Mairton B. da Silva Jr, Carlo Fischione
Federated Edge Learning (FEEL) is a distributed machine learning technique where each device contributes to training a global inference model by independently performing local computations with their data.
no code implementations • 1 Mar 2023 • Saeed Razavikia, Jose Mairton Barros da Silva Jr, Carlo Fischione
Over-the-air computation (AirComp) is a known technique in which wireless devices transmit values by analog amplitude modulation so that a function of these values is computed over the communication channel at a common receiver.
no code implementations • 21 Jun 2023 • Sajad Daei, Saeed Razavikia, Marios Kountouris, Mikael Skoglund, Gabor Fodor, Carlo Fischione
Resource allocation and multiple access schemes are instrumental for the success of communication networks, which facilitate seamless wireless connectivity among a growing population of uncoordinated and non-synchronized users.
no code implementations • 10 Oct 2023 • Saeed Razavikia, José Mairton Barros Da Silva Júnior, Carlo Fischione
However, when we use digital modulations for AirComp, a general belief is that the superposition property of the radio waves returns a meaningless overlapping of the digital signals.
no code implementations • 7 Nov 2023 • Saeed Razavikia, José Mairton Barros Da Silva Júnior, Carlo Fischione
Indeed, we propose a new federated edge learning framework in which edge devices use digital modulation for over-the-air uplink transmission to the edge server while they have no access to the channel state information.
no code implementations • 8 Nov 2023 • Mohammad Bokaei, Saeed Razavikia, Stefano Rini, Arash Amini, Hamid Behrouzi
In this paper, we investigate the problem of recovering the frequency components of a mixture of $K$ complex sinusoids from a random subset of $N$ equally-spaced time-domain samples.