183 citations · 640 across the 53 of their papers we have counts for
16 papers · 1 filter
Near-Field MIMO LoS Channel Recovery Under User Antenna Asymmetry
Shima Eslami, Jarkko Kaleva, Antti Tölli
Near-field (N-F) line-of-sight (LoS) MIMO channels admit a compact representation through a small number of geometric parameters describing the relative transceiver geometry, enabl…
Codebook-Based Effective CSI Feedback for Precoding Design in MIMO Systems
Bikshapathi Gouda, Antti Arvola, Juha Karjalainen +2
Downlink multi-user multiple-input multiple-output (MIMO) precoding with limited channel state information (CSI) feedback in multi-cell systems is studied. Conventional codebook-ba…
Uplink Transmit Power Optimization for Distributed Massive MIMO Systems with 1-Bit ADCs
Bikshapathi Gouda, Italo Atzeni, Antti Tölli
This paper addresses the problem of uplink transmit power optimization in distributed massive multiple-input multiple-output systems, where remote radio heads (RRHs) are equipped w…
Pilot-Based Uplink Power Control in Single-UE Massive MIMO Systems With 1-Bit ADCs
Amila Ravinath, Bikshapathi Gouda, Italo Atzeni +1
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…
Multi-User Data Detection in Massive MIMO with 1-Bit ADCs
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. The statistical properties…
Latency-Aware Multi-antenna SWIPT System with Battery-Constrained Receivers
Dileep Kumar, Onel L. Alcaraz López, Satya Krishna Joshi +1
Power splitting (PS) based simultaneous wireless information and power transfer (SWIPT) is considered in a multi-user multiple-input-single-output broadcast scenario. Specifically,…
Joint Minimum DL-UL Rate Maximization for Cell-Free Massive MIMO
Bikshapathi Gouda, Italo Atzeni, Antti Tölli
In cell-free massive multiple-input multiple-output (MIMO) systems, the beamforming strategies at the base stations (BSs) and user equipments (UEs) can be computed building on bi-d…
Latency-Constrained Highly-Reliable mmWave Communication via Multi-point Connectivity
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. In this paper, we explore…
D2D Assisted Multi-antenna Coded Caching
Hamidreza Bakhshzad Mahmoodi, Jarkko Kaleva, Seyed Pooya Shariatpanahi +1
A device-to-device (D2D) aided multi-antenna coded caching scheme is proposed to improve the average delivery rate and reduce the downlink (DL) beamforming complexity.} Novel beamf…
Two-stage Beamformer Design via Deterministic Equivalents
Hossein Asgharimoghaddam, Antti Tölli
Complexity reduction of optimal linear receiver is considered in a scenario where both the number of single-antenna user equipments (UEs) and base station (BS) antennas are…
Capacity Approaching Low Density Spreading in Uplink NOMA via Asymptotic Analysis
Hossein Asgharimoghaddam, Jarkko Kaleva, Antti Tölli
Low-density spreading non-orthogonal multiple-access (LDS-NOMA) is considered where single-antenna user-equipments (UEs) communicate with a base-station (BS) over fading su…
Blockage-aware Reliable mmWave Access via Coordinated Multi-point Connectivity
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…
Message passing-based link configuration in short range millimeter wave systems
Nitin Jonathan Myers, Jarkko Kaleva, Antti Tölli +1
Millimeter wave (mmWave) communication in typical wearable and data center settings is short range. As the distance between the transmitter and the receiver in short range scenario…
A Geometry-aided Message Passing Method for AoA-Based Short Range MIMO Channel Estimation
Jarkko Kaleva, Nitin Jonathan Myers, Antti Tölli +1
Short range channels commonly arise in millimeter wave (mmWave) wearable settings, where the length of the antenna arrays can be comparable to the distance between the radios. Conv…
Decentralizing Multicell Beamforming via Deterministic Equivalents
Hossein Asgharimoghaddam, Antti Tölli, Luca Sanguinetti +1
This paper focuses on developing a decentralized framework for coordinated minimum power beamforming wherein base stations (BSs), each equipped with antennas, serve sin…
Benefits of Positioning-Aided Communication Technology in High-Frequency Industrial IoT
Mike Koivisto, Olga Galinina, Sergey Andreev +6
The future of industrial applications is shaped by intelligent moving IoT devices, such as flying drones, advanced factory robots, and connected vehicles, which may operate (semi-)…