Search Results for author: Antti Tölli

Found 10 papers, 0 papers with code

Doubly 1-Bit Quantized Massive MIMO

no code implementations4 Dec 2023 Italo Atzeni, Antti Tölli, Duy H. N. Nguyen, A. Lee Swindlehurst

Enabling communications in the (sub-)THz band will call for massive multiple-input multiple-output (MIMO) arrays at either the transmit- or receive-side, or at both.

Pilot-Based Uplink Power Control in Single-UE Massive MIMO Systems With 1-Bit ADCs

no code implementations25 Oct 2023 Amila Ravinath, Bikshapathi Gouda, Italo Atzeni, Antti Tölli

We propose uplink power control (PC) methods for massive multiple-input multiple-output systems with 1-bit analog-to-digital converters, which are specifically tailored to address the non-monotonic data detection performance with respect to the transmit power of the user equipment (UE).

Multi-User Data Detection in Massive MIMO with 1-Bit ADCs

no code implementations31 Mar 2023 Amin Radbord, Italo Atzeni, Antti Tölli

We provide new analytical results on the uplink data detection in massive multiple-input multiple-output systems with 1-bit analog-to-digital converters.

A Variational Bayesian Perspective on Massive MIMO Detection

no code implementations23 May 2022 Duy H. N. Nguyen, Italo Atzeni, Antti Tölli, A. Lee Swindlehurst

In this paper, we build upon variational Bayes (VB) inference to design low-complexity multiuser detection algorithms for massive MIMO systems.

Latency-Aware Multi-antenna SWIPT System with Battery-Constrained Receivers

no code implementations10 Dec 2021 Dileep Kumar, Onel L. Alcaraz López, Satya Krishna Joshi, Antti Tölli

Power splitting (PS) based simultaneous wireless information and power transfer (SWIPT) is considered in a multi-user multiple-input-single-output broadcast scenario.

Joint Minimum DL-UL Rate Maximization for Cell-Free Massive MIMO

no code implementations12 Oct 2021 Bikshapathi Gouda, Italo Atzeni, Antti Tölli

Numerical results show that, in scenarios with short scheduling blocks, the proposed framework outperforms the case where the DL and UL beamforming strategies are computed individually via two separate bi-directional training phases thanks to the reduced training overhead.

Scheduling

Latency-Constrained Highly-Reliable mmWave Communication via Multi-point Connectivity

no code implementations20 Aug 2021 Dileep Kumar, Satya Joshi, Antti Tölli

The sensitivity of millimeter-wave (mmWave) radio channel to blockage is a fundamental challenge in achieving low-latency and ultra-reliable connectivity.

Non-Symmetric Coded Caching for Location-Dependent Content Delivery

no code implementations4 Feb 2021 Hamidreza Bakhshzad Mahmoodi, MohammadJavad Salehi, Antti Tölli

Immersive viewing is emerging as the next interface evolution for human-computer interaction.

Information Theory Information Theory

Capacity Approaching Low Density Spreading in Uplink NOMA via Asymptotic Analysis

no code implementations26 Nov 2019 Hossein Asgharimoghaddam, Jarkko Kaleva, Antti Tölli

Conducting analysis in the regime where $F$, $K$, and ${d_k,\forall k}$ converge to $+\infty$ at the same rate, we present EMI as a deterministic equivalent plus a residual term.

Blockage-aware Reliable mmWave Access via Coordinated Multi-point Connectivity

no code implementations14 Oct 2019 Dileep Kumar, Jarkko Kaleva, Antti Tölli

The fundamental challenge of the millimeter-wave (mmWave) frequency band is the sensitivity of the radio channel to blockages, which gives rise to unstable connectivity and impacts the reliability of a system.

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