537 citations · 5.2k across the 258 of their papers we have counts for
27 papers · 2 filters
Uplink-Downlink Channel Covariance Transformations and Precoding Design for FDD Massive MIMO
Mahdi Barzegar Khalilsarai, Yi Song, Tianyu Yang +2
A large majority of cellular networks deployed today make use of Frequency Division Duplexing (FDD) where, in contrast with Time Division Duplexing (TDD), the channel reciprocity d…
On the Fundamental Limits of Device-to-Device Private Caching under Uncoded Cache Placement and User Collusion
Kai Wan, Hua Sun, Mingyue Ji +2
In the coded caching problem, as originally formulated by Maddah-Ali and Niesen, a server communicates via a noiseless shared broadcast link to multiple users that have local stora…
Grant-Free Massive Random Access With a Massive MIMO Receiver
Alexander Fengler, Saeid Haghighatshoar, Peter Jung +1
We consider the problem of unsourced random access (U-RA), a grant-free uncoordinated form of random access, in a wireless channel with a massive MIMO base station equipped with a…
Structured Channel Covariance Estimation from Limited Samples in Massive MIMO
Mahdi Barzegar Khalilsarai, Tianyu Yang, Saeid Haghighatshoar +1
Obtaining channel covariance knowledge is of great importance in various Multiple-Input Multiple-Output MIMO communication applications, including channel estimation and covariance…
Machine Learning for Geometrically-Consistent Angular Spread Function Estimation in Massive MIMO
Yi Song, Mahdi Barzegar Khalilsarai, Saeid Haghighatshoar +1
In the spatial channel models used in multi-antenna wireless communications, the propagation from a single-antenna transmitter (e.g., a user) to an M-antenna receiver (e.g., a Base…
On the Effectiveness of OTFS for Joint Radar and Communication
Lorenzo Gaudio, Mari Kobayashi, Giuseppe Caire +1
We consider a joint radar estimation and communication system using orthogonal time frequency space (OTFS) modulation. The scenario is motivated by vehicular applications where a v…
Massive Access for Future Wireless Communication Systems
Yongpeng Wu, Xiqi Gao, Shidong Zhou +3
Multiple access technology played an important role in wireless communication in the last decades: it increases the capacity of the channel and allows different users to access the…
Non-Bayesian Activity Detection, Large-Scale Fading Coefficient Estimation, and Unsourced Random Access with a Massive MIMO Receiver
Alexander Fengler, Saeid Haghighatshoar, Peter Jung +1
In this paper, we study the problem of user activity detection and large-scale fading coefficient estimation in a random access wireless uplink with a massive MIMO base station wit…
On the Optimality of Treating Inter-Cell Interference as Noise: Downlink Cellular Networks and Uplink-Downlink Duality
Hamdi Joudeh, Xinping Yi, Bruno Clerckx +1
We consider the information-theoretic optimality of treating inter-cell interference as noise (multi-cell TIN) in downlink cellular networks. We focus on scenarios modeled by the G…
Device-to-Device Private Caching with Trusted Server
Kai Wan, Hua Sun, Mingyue Ji +2
In order to preserve the privacy of the users demands from other users, in this paper we formulate a novel information theoretic Device-to-Device (D2D) private caching model by add…
On the Fundamental Limits of MIMO Massive Access Communication
Fan Wei, Yongpeng Wu, Wen Chen +2
The multiple access channel (MAC) with many-user is a general model for massive machine type communications. In this paradigm, the number of users may be comparable or even larger…
On Coded Caching with Private Demands
Kai Wan, Giuseppe Caire
Caching is an efficient way to reduce network traffic congestion during peak hours by storing some content at the user's local cache memory without knowledge of later demands. For…
Fully-/Partially-Connected Hybrid Beamforming 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…
Data-Aided Secure Massive MIMO Transmission under the Pilot Contamination Attack
Yongpeng Wu, Chao-Kai Wen, Wen Chen +3
In this paper, we study the design of secure communication for time division duplex multi-cell multi-user massive multiple-input multiple-output (MIMO) systems with active eavesdro…
Routing-Based Delivery in Combination-Type Networks with Random Topology
Mozhgan Bayat, Kai Wan, Giuseppe Caire
The coded caching scheme proposed by Maddah-Ali and Niesen (MAN) transmits coded multicast messages to users equipped with caches and it is known to be optimal within a constant fa…
Joint State Sensing and Communication over Memoryless Multiple Access Channels
Mari Kobayashi, Hassan Hamad, Gerhard Kramer +1
A memoryless state-dependent multiple access channel (MAC) is considered where two transmitters wish to convey a respective message to a receiver while simultaneously estimating th…
Performance Analysis of Joint Radar and Communication using OFDM and OTFS
Lorenzo Gaudio, Mari Kobayashi, Björn Bissinger +1
We consider a joint radar estimation and communication system using orthogonal frequency division multiplexing (OFDM) and orthogonal time frequency space (OTFS) modulations. The sc…
Joint User Selection, Power Allocation, and Precoding Design with Imperfect CSIT for Multi-Cell MU-MIMO Downlink Systems
Jiwook Choi, Namyoon Lee, Song-Nam Hong +1
In this paper, a new optimization framework is presented for the joint design of user selection, power allocation, and precoding in multi-cell multi-user multiple-input multiple-ou…
Closed-form performance analysis of linear MIMO receivers in general fading scenarios
M. Kieburg, G. Akemann, G. Alfano +1
Linear precoding and post-processing schemes are ubiquitous in wireless multi-input-multi-output (MIMO) settings, due to their reduced complexity with respect to optimal strategies…
Multihop Routing for Data Delivery in V2X Networks
Yilin Li, Jian Luo, Richard A. Stirling-Gallacher +2
Data delivery relying on the carry-and-forward strategy of vehicle-to-vehicle (V2V) communications is of significant importance, however highly challenging due to frequent connecti…
Integrated Access and Backhaul Optimization for Millimeter Wave Heterogeneous Networks
Yilin Li, Jian Luo, Richard A. Stirling-Gallacher +1
By allowing a large number of links to be simultaneously transmitted, directional antenna arrays with beamforming have been envisioned as a promising candidate to reach unprecedent…
Polynomial-time Capacity Calculation and Scheduling for Half-Duplex 1-2-1 Networks
Yahya H. Ezzeldin, Martina Cardone, Christina Fragouli +1
This paper studies the 1-2-1 half-duplex network model, where two half-duplex nodes can communicate only if they point `beams' at each other; otherwise, no signal can be exchanged…
Massive MIMO Unsourced Random Access
Alexander Fengler, Giuseppe Caire, Peter Jung +1
We consider an extension of the massive unsourced random access originally proposed by Polyanskiy to the case where the receiver has a very large number of antennas (a massive MIMO…
SPARCs for Unsourced Random Access
Alexander Fengler, Peter Jung, Giuseppe Caire
Unsourced random-access (U-RA) is a type of grant-free random access with a virtually unlimited number of users, of which only a certain number are active on the same time sl…