50 citations · 77 across the 21 of their papers we have counts for
27 papers
Perspectives on 6G Architectures
Rainer Liebhart, Mansoor Shafi, Harsh Tataria +2
Mobile communications have been undergoing a generational change every ten years. While 5G network deployments are maturing, significant efforts are being made to standardize 6G, w…
Channel Sparsity Variation and Model-Based Analysis on 6, 26, and 132 GHz Measurements
Ximan Liu, Jianhua Zhang, Pan Tang +4
In this paper, the level of sparsity is examined at 6, 26, and 132 GHz carrier frequencies by conducting channel measurements in an indoor office environment. By using the Gini ind…
Massive MIMO Evolution Towards 3GPP Release 18
Huangping Jin, Kunpeng Liu, Gilwon Lee +7
Since the introduction of fifth-generation new radio (5G-NR) in Third Generation Partnership Project (3GPP) Release 15, swift progress has been made to evolve 5G with 3GPP Release…
RF Interference in Lens-Based Massive MIMO Systems -- An Application Note
Harsh Tataria
We analyze the uplink radio frequency (RF) interference from a multiplicity of single-antenna user equipments transmitting to a cellular base station (BS) within the same time-freq…
A Review of Indoor Millimeter Wave Device-based Localization and Device-free Sensing Technologies and Applications
Anish Shastri, Neharika Valecha, Enver Bashirov +5
The commercial availability of low-cost millimeter wave (mmWave) communication and radar devices is starting to improve the penetration of such technologies in consumer markets, pa…
Sum Capacity Loss Quantification With Optimal and Sub-Optimal Precoding in Heterogeneous Multiuser Channels
Harsh Tataria, Mansoor Shafi, Dino Pjanić
We analytically approximate the expected sum capacity loss between the optimal downlink precoding technique of dirty paper coding (DPC), and the sub-optimal technique of zero-forci…
Six Critical Challenges for 6G Wireless Systems
Harsh Tataria, Mansoor Shafi, Mischa Dohler +1
A large number of papers are now appearing on sixth-generation (6G) wireless systems, covering different aspects, ranging from vision, architecture, applications, and technology br…
Learning-Based UE Classification in Millimeter-Wave Cellular Systems With Mobility
Dino Pjanić, Alexandros Sopasakis, Harsh Tataria +2
Millimeter-wave cellular communication requires beamforming procedures that enable alignment of the transmitter and receiver beams as the user equipment (UE) moves. For efficient b…
Simple Framework of ZF Precoding Analysis for Full-Dimensional Massive MIMO Systems
Harsh Tataria, Mansoor Shafi
We provide a simple, yet general and accurate framework for analyzing zero-forcing (ZF) precoding performance for a full-dimensional massive multiple-input multiple-output system.…
27.5-29.5 GHz Switched Array Sounder for Dynamic Channel Characterization: Design, Implementation and Measurements
Harsh Tataria, Erik L. Bengtsson, Ove Edfors +1
A pre-requisite for the design of wireless systems is the understanding of the propagation channel. While a wealth of propagation knowledge exists for bands below 6 GHz, the same c…
6G Wireless Systems: Vision, Requirements, Challenges, Insights, and Opportunities
Harsh Tataria, Mansoor Shafi, Andreas F. Molisch +3
Mobile communications have been undergoing a generational change every ten years or so. However, the time difference between the so-called "G's" is also decreasing. While fifth-gen…
Favorable Propagation with User Cluster Sharing
Chelsea Miller, Peter J. Smith, Pawel A. Dmochowski +2
We examine the favorable propagation (FP) behavior of a massive multi-user multiple-input-multiple-output (MU-MIMO) system equipped with a uniform linear array (ULA), horizontal un…
Standardization of Propagation Models: 800 MHz to 100 GHz -- A Historical Perspective
Harsh Tataria, Katsuyuki Haneda, Andreas F. Molisch +2
Propagation models constitute a fundamental building block of wireless communications research. Before we build and operate real systems, we must understand the science of radio pr…
A Light Signalling Approach to Node Grouping for Massive MIMO IoT Networks
Emma Fitzgerald, Michał Pióro, Harsh Tataria +3
Massive MIMO is a leading technology to connect very large numbers of energy constrained nodes, as it offers both extensive spatial multiplexing and large array gain. A challenge r…
Real-Time Implementation Aspects of Large Intelligent Surfaces
Harsh Tataria, Fredrik Tufvesson, Ove Edfors
With the potential to provide a clean break from massive multiple-input multiple-output, large intelligent surfaces (LISs) have recently received a thrust of research interest. Var…
Impact of Spatially Consistent Channels on Digital Beamforming for Millimeter-Wave Systems
Harsh Tataria, Fredrik Tufvesson
The premise of massive multiple-input multiple-output (MIMO) is based around coherent transmission and detection. Majority of the vast literature on massive MIMO presents performan…
Massive MIMO Asymptotics for Ray-Based Propagation Channels
Shuang Li, Peter Smith, Pawel Dmochowski +3
Favorable propagation (FP) and channel hardening (CH) are desired properties in massive multiple-input multiple-output (MIMO) systems. To date, these properties have primarily been…
Amplitude and Phase Estimation for Absolute Calibration of Massive MIMO Front-Ends
Guoda Tian, Harsh Tataria, Fredrik Tufvesson
Massive multiple-input multiple-output (MIMO) promises significantly higher performance relative to conventional multiuser systems. However, the promised gains of massive MIMO syst…
Real-Time Deployment Aspects of C-Band and Millimeter-Wave 5G-NR Systems
Mansoor Shafi, Harsh Tataria, Andreas F. Molisch +2
Fifth-generation (5G) new radio (NR) deployments are being rolled out in both the C-band (3.3 - 5.0 GHz) and millimeter-wave (mmWave) band (24.5 - 29.5 GHz). For outdoor scenarios,…
Channel Correlation Diversity in MU-MIMO Systems -- Analysis and Measurements
Harsh Tataria, Seun Sangodoyin, Andreas F. Molisch +4
In multiuser multiple-input multiple-output (MU-MIMO) systems, channel correlation is detrimental to system performance. We demonstrate that widely used, yet overly simplified, cor…
Lens-Based Beamformer for Low-Complexity Millimeter-Wave Cellular Systems
Muhammad Ali Babar Abbasi, Vincent F. Fusco, Harsh Tataria +1
Data rate requirements for cellular communications are expected to increase 1000-fold by 2020, compared to 2010. This is mainly because of the rapid increase in the number of wirel…
Massive MIMO with a Generalized Channel Model: Fundamental Aspects
Michail Matthaiou, Hien Quoc Ngo, Peter J. Smith +2
Massive multiple-input multiple-output (MIMO) is becoming a mature technology, and has been approved for standardization in the 5G ecosystem. Although there is a large body of pape…
On the Impact of Spillover Losses in 28 GHz Rotman Lens Arrays for 5G Applications
Muhammad Ali Babar Abbasi, Harsh Tataria, Vincent F. Fusco +1
This work demonstrates the sensitivity of lens antenna arrays operating at millimeter-wave (mmWave) frequencies. Considering a Rotman lens array in receive mode, our investigation…
Does Massive MIMO Fail in Ricean Channels?
Michail Matthaiou, Peter J. Smith, Hien Quoc Ngo +1
Massive multiple-input multiple-output (MIMO) is now making its way to the standardization exercise of future 5G networks. Yet, there are still fundamental questions pertaining to…