7k citations · 14k across the 58 of their papers we have counts for
26 papers · 1 filter
Impact of Array Configuration on Head-Mounted Display Performance at mmWave Bands
Alexander Marinšek, Xuesong Cai, Lieven De Strycker +2
Immersing a user in life-like extended reality (XR) scenery using a head-mounted display (HMD) with a constrained form factor and hardware complexity requires remote rendering on a…
Stochastic Geometry Analysis of a New GSCM with Dual Visibility Regions
Anish Pradhan, Harpreet S. Dhillon, Fredrik Tufvesson +1
The geometry-based stochastic channel models (GSCM), which can describe realistic channel impulse responses, often rely on the existence of both {\em local} and {\em far} scatterer…
Propagation Modeling for Physically Large Arrays: Measurements and Multipath Component Visibility
Thomas Wilding, Benjamin J. B. Deutschmann, Christian Nelson +3
This paper deals with propagation and channel modeling for physically large arrays. The focus lies on acquiring a spatially consistent model, which is essential, especially for pos…
ML-Enabled Outdoor User Positioning in 5G NR Systems via Uplink SRS Channel Estimates
Andre Ráth, Dino Pjanić, Bo Bernhardsson +1
Cellular user positioning is a promising service provided by Fifth Generation New Radio (5G NR) networks. Besides, Machine Learning (ML) techniques are foreseen to become an integr…
A Hybrid Antenna Switching Scheme for Dynamic Channel Sounding
Ali Al-Ameri, Jaeyoung Park, Juan Sanchez +2
Channel sounding is essential for the development of radio systems. One flexible strategy is the switched-array-based channel sounding, where antenna elements are activated at diff…
Experimental Validation of Single BS 5G mmWave Positioning and Mapping for Intelligent Transport
Yu Ge, Hedieh Khosravi, Fan Jiang +10
Positioning with 5G signals generally requires connection to several base stations (BSs), which makes positioning more demanding in terms of infrastructure than communications. To…
High-Precision Machine-Learning Based Indoor Localization with Massive MIMO System
Guoda Tian, Ilayda Yaman, Michiel Sandra +3
High-precision cellular-based localization is one of the key technologies for next-generation communication systems. In this paper, we investigate the potential of applying machine…
Extended FastSLAM Using Cellular Multipath Component Delays and Angular Information
Junshi Chen, Russ Whiton, Fredrik Tufvesson
Opportunistic navigation using cellular signals is appealing for scenarios where other navigation technologies face challenges. In this paper, long-term evolution (LTE) downlink si…
High-Resolution Channel Sounding and Parameter Estimation in Multi-Site Cellular Networks
Junshi Chen, Russ Whiton, Xuhong Li +1
Accurate understanding of electromagnetic propagation properties in real environments is necessary for efficient design and deployment of cellular systems. In this paper, we show a…
Enhanced Effective Aperture Distribution Function for Characterizing Large-Scale Antenna Arrays
Xuesong Cai, Meifang Zhu, Aleksei Fedorov +1
Accurate characterization of large-scale antenna arrays is growing in importance and complexity for the fifth-generation (5G) and beyond systems, as they feature more antenna eleme…
Toward 6G with Terahertz Communications: Understanding the Propagation Channels
Xuesong Cai, Xiang Cheng, Fredrik Tufvesson
This article aims at providing insights for a comprehensive understanding of terahertz (THz) propagation channels. Specifically, we discuss essential THz channel characteristics to…
Beamspace Multidimensional ESPRIT Approaches for Simultaneous Localization and Communications
Fan Jiang, Fuxi Wen, Yu Ge +3
Modern wireless communication systems operating at high carrier frequencies are characterized by a high dimensionality of the underlying parameter space (including channel gains, a…
LuMaMi28: Real-Time Millimeter-Wave Massive MIMO Systems with Antenna Selection
MinKeun Chung, Liang Liu, Andreas Johansson +11
This paper presents LuMaMi28, a real-time 28 GHz massive multiple-input multiple-output (MIMO) testbed. In this testbed, the base station has 16 transceiver chains with a fully-dig…
Experimental Exploration of Unlicensed Sub-GHz Massive MIMO for Massive Internet-of-Things
Gilles Callebaut, Sara Gunnarsson, Andrea P. Guevara +3
Due to the increase of Internet-of-Things (IoT) devices, IoT networks are getting overcrowded. Networks can be extended with more gateways, increasing the number of supported devic…
Massive MIMO goes Sub-GHz: Implementation and Experimental Exploration for LPWANs
Gilles Callebaut, Sara Gunnarsson, Andrea P. Guevara +4
Low-Power Wide-Area Networks operating in the unlicensed bands are being deployed to connect a rapidly growing number of Internet-of-Things devices. While the unlicensed sub-GHz ba…
Millimeter-Wave Massive MIMO Testbed with Hybrid Beamforming
MinKeun Chung, Liang Liu, Andreas Johansson +5
Massive multiple-input multiple-out (MIMO) technology is vital in millimeter-wave (mmWave) bands to obtain large array gains. However, there are practical challenges, such as high…
Dynamic mmWave Channel Emulation in a Cost-Effective MPAC with Dominant-Cluster Concept
Xuesong Cai, Yang Miao, Jinxing Li +3
Millimeter-Wave (mmWave) massive multiple-input multiple-output (MIMO) has been considered as a key enabler for the fifth-generation (5G) communications. It is essential to design…
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…
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…
Channel Hardening in Massive MIMO: Model Parameters and Experimental Assessment
Sara Gunnarsson, José Flordelis, Liesbet Van der Perre +1
Reliability is becoming increasingly important for many applications envisioned for future wireless systems. A technology that could improve reliability in these systems is massive…
RadioWeaves for efficient connectivity: analysis andimpact of constraints in actual deployments
Liesbet Van der Perre, Erik G. Larsson, Fredrik Tufvesson +3
We present a new type of wireless access infras-tructure consisting of a fabric of dispersed electronic circuitsand antennas that collectively function as a massive, distributed an…
Massive MIMO Extensions to the COST 2100 Channel Model: Modeling and Validation
Jose Flordelis, Xuhong Li, Ove Edfors +1
To enable realistic studies of massive multiple-input multiple-output systems, the COST 2100 channel model is extended based on measurements. First, the concept of a base station-s…
Massive MIMO Optimization with Compatible Sets
Emma Fitzgerald, Michał Pióro, Fredrik Tufvesson
Massive multiple-input multiple-output (MIMO) is expected to be a vital component in future 5G systems. As such, there is a need for new modeling in order to investigate the perfor…
Digital Predistortion for Multiuser Hybrid MIMO at mmWaves
Alberto Brihuega, Lauri Anttila, Mahmoud Abdelaziz +2
Efficient mitigation of power amplifier (PA) nonlinear distortion in multi-user hybrid precoding based broadband mmWave systems is an open research problem. In this article, we fir…