183 citations · 640 across the 53 of their papers we have counts for
62 papers
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…
Low-Subpacketization MIMO Coded Caching with Flexible Stream Allocation
Mohammad NaseriTehrani, MohammadJavad Salehi, Antti Tölli
Subpacketization remains a major obstacle to the practical deployment of coded caching (CC) in multi-antenna wireless networks. In this paper, we propose a low-complexity multiple-…
Cache-Aided Asymmetric MIMO Communications: Achievable DoF Analysis
Mohammad NaseriTehrani, MohammadJavad Salehi, Antti Tölli
Integrating coded caching (CC) into multiple-input multiple-output (MIMO) communications significantly enhances the achievable degrees of freedom (DoF). This paper investigates a p…
Asymmetric Stream Allocation and Linear Decodability in MIMO Coded Caching
Mohammad NaseriTehrani, MohammadJavad Salehi, Antti Tölli
Coded caching (CC) can transform cache memory at network devices into an active communication resource and significantly enhance the Degrees of Freedom (DoF) of multi-input multi-o…
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…
Cache-Aided MIMO Communications: DoF Analysis and Transmitter Optimization
Mohammad NaseriTehrani, MohammadJavad Salehi, Antti Tölli
Cache-aided MIMO communications aims to jointly exploit both coded caching~(CC) and spatial multiplexing gains to enhance communication efficiency. In this paper, we analyze both t…
6G: The Intelligent Network of Everything
Harri Pennanen, Tuomo Hänninen, Oskari Tervo +2
The global 6G vision has taken its shape after years of international research and development efforts. This work culminated in ITU-R Recommendation on "IMT-2030 Framework". While…
Combined DL-UL Distributed Beamforming Design for Cell-Free Massive MIMO
Bikshapathi Gouda, Antti Arvola, Italo Atzeni +1
We consider a cell-free massive multiple-input multiple-output system with multi-antenna access points (APs) and user equipments (UEs), where the UEs can be served in both the down…
Coded Multi-User Information Retrieval with a Multi-Antenna Helper Node
Milad Abolpour, MohammadJavad Salehi, Soheil Mohajer +2
A novel coding design is proposed to enhance information retrieval in a wireless network of users with partial access to the data, in the sense of observation, measurement, computa…
Optimal Fairness Scheduling for Coded Caching in Multi-AP Multi-antenna WLAN
Kagan Akcay, MohammadJavad Salehi, Antti Tölli +1
Coded caching (CC) schemes exploit the cumulative cache memory of network users, outperforming traditional uncoded schemes where cache contents are only used locally. Interestingly…
Low-complexity Linear Multicast Beamforming for Cache-aided MIMO Communications
Mohammad NaseriTehrani, MohammadJavad Salehi, Antti Tölli
A practical and scalable multicast beamformer design in multi-input multi-output~(MIMO) coded caching~(CC) systems is introduced in this paper. The proposed approach allows multica…
Enhanced Uplink Data Detection for Massive MIMO with 1-Bit ADCs: Analysis and Joint Detection
Amin Radbord, Italo Atzeni, Antti Tolli
We present a new analytical framework on the uplink data detection for massive multiple-input multiple-output systems with 1-bit analog-to-digital converters (ADCs). We first chara…
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…
Cache-Aided Communications in MISO Networks with Dynamic User Behavior
Milad Abolpour, MohammadJavad Salehi, Antti Tölli
Coded caching (CC) can substantially enhance network performance by leveraging memory as an additional communication resource. However, the use of CC is challenging in various prac…
Uplink Power Control for Distributed Massive MIMO with 1-Bit ADCs
Bikshapathi Gouda, Italo Atzeni, Antti Tölli
We consider the problem of uplink power control for distributed massive multiple-input multiple-output systems where the base stations (BSs) are equipped with 1-bit analog-to-digit…
Fairness Enhancement of UAV Systems with Hybrid Active-Passive RIS
Nhan Thanh Nguyen, Van-Dinh Nguyen, Hieu Van Nguyen +4
We consider unmanned aerial vehicle (UAV)-enabled wireless systems where downlink communications between a multi-antenna UAV and multiple users are assisted by a hybrid active-pass…
Low-Complexity Multi-Antenna Coded Caching Using Location-Aware Placement Delivery Arrays
Hamidreza Bakhshzad Mahmoodi, MohammadJavad Salehi, Antti Tolli
A location-aware multi-antenna coded caching scheme is proposed for applications with location-dependent data requests, such as wireless immersive experience, where users are immer…
Cache-Aided Communications in MISO Networks with Dynamic User Behavior: A Universal Solution
Milad Abolpour, MohammadJavad Salehi, Antti Tölli
A practical barrier to the implementation of cache-aided networks is dynamic and unpredictable user behavior. In dynamic setups, users can freely depart and enter the network at an…
Multicast Transmission Design with Enhanced DoF for MIMO Coded Caching Systems
Mohammad NaseriTehrani, MohammadJavad Salehi, Antti Tölli
Integrating coded caching (CC) into multi-input multi-output (MIMO) setups significantly enhances the achievable degrees of freedom (DoF). We consider a cache-aided MIMO configurat…
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…
Distributed Precoding Design for Multi-Group Multicasting in Cell-Free Massive MIMO
Bikshapathi Gouda, Italo Atzeni, Antti Tölli
We consider multi-group multicast precoding designs for cell-free massive multiple-input multiple-output (MIMO) systems. To optimize the transmit and receive beamforming strategies…
Multicast Beamformer Design for MIMO Coded Caching Systems
MohammadJavad Salehi, Mohammad NaseriTehrani, Antti Tölli
Coded caching (CC) techniques have been shown to be conveniently applicable in multi-input multi-output (MIMO) systems. In a -user network with spatial multiplexing gains of …
Pilot-Aided Distributed Multi-Group Multicast Precoding Design for Cell-Free Massive MIMO
Bikshapathi Gouda, Italo Atzeni, Antti Tölli
We propose fully distributed multi-group multicast precoding designs for cell-free massive multiple-input multiple-output (MIMO) systems with modest training overhead. We target th…