537 citations · 5.2k across the 258 of their papers we have counts for
23 papers · 2 filters
Capacity Scaling of Massive MIMO in Strong Spatial Correlation Regimes
Junyoung Nam, Giuseppe Caire, Merouane Debbah +1
This paper investigates the capacity scaling of multicell massive MIMO systems in the presence of spatially correlated fading. In particular, we focus on the strong spatial correla…
Fast HARQ over Finite Blocklength Codes: A Technique for Low-Latency Reliable Communication
Behrooz Makki, Tommy Svensson, Giuseppe Caire +1
This paper studies the performance of delay-constrained hybrid automatic repeat request HARQ protocols. Particularly, we propose a fast HARQ protocol where, to increase the end-to-…
On-the-fly Large-scale Channel-Gain Estimation for Massive Antenna-Array Base Stations
Chenwei Wang, Ozgun Y. Bursalioglu, Haralabos Papadopoulos +1
We propose a novel scheme for estimating the large-scale gains of the channels between user terminals (UTs) and base stations (BSs) in a cellular system. The scheme leverages TDD o…
On the Fundamental Limits of Fog-RAN Cache-aided Networks with Downlink and Sidelink Communications
Kai Wan, Daniela Tuninetti, Mingyue Ji +1
Maddah-Ali and Niesen (MAN) in 2014 showed that coded caching in single bottleneck-link broadcast networks allows serving an arbitrarily large number of cache-equipped users with a…
Fully-Connected vs. Sub-Connected Hybrid Precoding Architectures for mmWave MU-MIMO
Xiaoshen Song, Thomas Kühne, Giuseppe Caire
Hybrid digital analog (HDA) beamforming has attracted considerable attention in practical implementation of millimeter wave (mmWave) multiuser multiple-input multiple-output (MU-MI…
Multiple Measurement Vectors Problem: A Decoupling Property and its Applications
Saeid Haghighatshoar, Giuseppe Caire
We study a Compressed Sensing (CS) problem known as Multiple Measurement Vectors (MMV) problem, which arises in joint estimation of multiple signal realizations when the signal sam…
On the Fundamental Limits of MIMO Massive Multiple Access Channels
Fan Wei, Yongpeng Wu, Wen Chen +2
In this paper, we study the multiple-antenna wireless communication networks, where a large number of devices simultaneously communicate with an access point. The capacity region o…
Fundamental Limits of Decentralized Data Shuffling
Kai Wan, Daniela Tuninetti, Mingyue Ji +2
Data shuffling of training data among different computing nodes (workers) has been identified as a core element to improve the statistical performance of modern large-scale machine…
Delay Performance of the Multiuser MISO Downlink under Imperfect CSI and Finite Length Coding
Sebastian Schiessl, James Gross, Mikael Skoglund +1
We use stochastic network calculus to investigate the delay performance of a multiuser MISO system with zero-forcing beamforming. First, we consider ideal assumptions with long cod…
Efficient Beam Alignment for mmWave Single-Carrier Systems with Hybrid MIMO Transceivers
Xiaoshen Song, Saeid Haghighatshoar, Giuseppe Caire
Communication at millimeter wave (mmWave) bands is expected to become a key ingredient of next generation (5G) wireless networks. Effective mmWave communications require fast and r…
Low-Overhead Hierarchically-Sparse Channel Estimation for Multiuser Wideband Massive MIMO
Gerhard Wunder, Stelios Stefanatos, Axel Flinth +2
The problem of excessive pilot overhead required for uplink massive MIMO channel estimation is well known, let alone when it is considered along with wideband (OFDM) transmissions.…
Joint State Sensing and Communication: Optimal Tradeoff for a Memoryless Case
Mari Kobayashi, Giuseppe Caire, Gerhard Kramer
A communication setup is considered where a transmitter wishes to simultaneously sense its channel state and convey a message to a receiver. The state is estimated at the transmitt…
Delay Performance of the Multiuser MISO Downlink
Sebastian Schiessl, James Gross, Giuseppe Caire
We analyze a MISO downlink channel where a multi-antenna transmitter communicates with a large number of single-antenna receivers. Using linear beamforming or nonlinear precoding t…
Controllable Identifier Measurements for Private Authentication with Secret Keys
Onur Günlü, Kittipong Kittichokechai, Rafael F. Schaefer +1
The problem of secret-key based authentication under a privacy constraint on the source sequence is considered. The identifier measurements during authentication are assumed to be…
Hierarchical Sparse Channel Estimation for Massive MIMO
Gerhard Wunder, Ingo Roth, Axel Flinth +4
The problem of wideband massive MIMO channel estimation is considered. Targeting for low complexity algorithms as well as small training overhead, a compressive sensing (CS) approa…
Fog Massive MIMO: A User-Centric Seamless Hot-Spot Architecture
Ozgun Y. Bursalioglu, Giuseppe Caire, Ratheesh K. Mungara +2
The decoupling of data and control planes, as proposed for 5G networks, will enable the efficient implementation of multitier networks where user equipment (UE) nodes obtain covera…
Achieving Spatial Scalability for Coded Caching over Wireless Networks
Mozhgan Bayat, Ratheesh K. Mungara, Giuseppe Caire
The coded caching scheme proposed by Maddah-Ali and Niesen considers the delivery of files in a given content library to users through a deterministic error-free network where a co…
FDD Massive MIMO via UL/DL Channel Covariance Extrapolation and Active Channel Sparsification
Mahdi Barzegar Khalilsarai, Saeid Haghighatshoar, Xinping Yi +1
We propose a novel method for massive Multiple-Input Multiple-Output (massive MIMO) in Frequency Division Duplexing (FDD) systems. Due to the large frequency separation between Upl…
A New Scaling Law for Activity Detection in Massive MIMO Systems
Saeid Haghighatshoar, Peter Jung, Giuseppe Caire
In this paper, we study the problem of \textit{activity detection} (AD) in a massive MIMO setup, where the Base Station (BS) has antennas. We consider a block fading chan…
Data-Aided Secure Massive MIMO Transmission with Active Eavesdropping
Yongpeng Wu, Chao-Kai Wen, Wen Chen +3
In this paper, we study the design of secure communication for time division duplexing multi-cell multi-user massive multiple-input multiple-output (MIMO) systems with active eaves…
A Survey of Physical Layer Security Techniques for 5G Wireless Networks and Challenges Ahead
Yongpeng Wu, Ashish Khisti, Chengshan Xiao +3
Physical layer security which safeguards data confidentiality based on the information-theoretic approaches has received significant research interest recently. The key idea behind…
Multi-Band Covariance Interpolation with Applications in Massive MIMO
Saeid Haghighatshoar, Mahdi Barzegar Khalilsarai, Giuseppe Caire
In this paper, we study the problem of multi-band (frequency-variant) covariance interpolation with a particular emphasis towards massive MIMO applications. In a massive MIMO syste…
Gaussian 1-2-1 Networks: Capacity Results for mmWave Communications
Yahya H. Ezzeldin, Martina Cardone, Christina Fragouli +1
This paper proposes a new model for wireless relay networks referred to as "1-2-1 network", where two nodes can communicate only if they point "beams" at each other, while if they…