Karthik Upadhya

29 papers B 3Misc 4Journal 17Unranked 5
YearRankTypeTitle / Venue / Authors
2025 J jnl
Knowledge Graph-Based approach for Sustainable 6G End-to-End System Design.
CoRR
Akshay Jain, Sylvaine Kerboeuf, Sokratis Barmpounakis, Cristóbal Vinagre Z., Stefan Wendt, Dinh Thai Bui, Pol Alemany, Riccardo Nicolicchia, José María Jorquera Valero, Dani Korpi, Mohammad Hossein Moghaddam, Mikko A. Uusitalo, Patrik Rugeland, Abdelkader Outtagarts, Karthik Upadhya, Panagiotis Demestichas, Raul Muñoz, Manuel Gil Pérez, Daniel Adanza, Ricard Vilalta
2025 — conf
LPD-Aware 5G NR Downlink Synchronization for Tactical Networks.
ICMCIS
Akshay Jain, Karthik Upadhya, Mikko A. Uusitalo, Harish Viswanathan
2023 J jnl
28 GHz NLOS Channel Measurements Revealing Low Path Loss and High Angular Spread in Container Ports.
CoRR
Andrea Bedin, Dmitry Chizhik, Jinfeng Du, Martti Moisio, Karthik Upadhya, Reinaldo A. Valenzuela, Mikko A. Uusitalo
2023 J jnl
Heterogeneous Rank Beamforming for Industrial Communications.
CoRR
Andrea Bedin, Akshay Jain, Andrea Zanella, Karthik Upadhya
2022 J jnl
Digital Twins for Industry 4.0 in the 6G Era.
CoRR
Bin Han, Mohammad Asif Habibi, Björn Richerzhagen, Kim Schindhelm, Florian Zeiger, Fabrizio Lamberti, Filippo Gabriele Pratticò, Karthik Upadhya, Charalampos Korovesis, Ioannis-Prodromos Belikaidis, Panagiotis Demestichas, Siyu Yuan, Hans D. Schotten
2022 B conf
Jamming Resilient Indoor Factory Deployments: Design and Performance Evaluation.
WCNC
Leonardo Chiarello, Paolo Baracca, Karthik Upadhya, Saeed R. Khosravirad, Silvio Mandelli, Thorsten Wild
2022 J jnl
Jamming Resilient Indoor Factory Deployments: Design and Performance Evaluation.
CoRR
Leonardo Chiarello, Paolo Baracca, Karthik Upadhya, Saeed R. Khosravirad, Silvio Mandelli, Thorsten Wild
2022 B conf
Passive Reflectors for Enhancing Cellular UAV Coverage.
WCNC
Karthik Upadhya, Kimmo Valkealahti, Martti Moisio, Dani Korpi, Tero Ihalainen, Mikko A. Uusitalo
2021 J jnl
Extreme Communication in 6G: Vision and Challenges for 'in-X' Subnetworks.
IEEE Open J. Commun. Soc.
Gilberto Berardinelli, Paolo Baracca, Ramoni O. Adeogun, Saeed R. Khosravirad, Frank Schaich, Karthik Upadhya, Dong Li, Tao Tao, Harish Viswanathan, Preben E. Mogensen
2021 J jnl
Impact of Pilot Overhead and Channel Estimation on the Performance of Massive MIMO.
IEEE Trans. Commun.
Atchutaram K. Kocharlakota, Karthik Upadhya, Sergiy A. Vorobyov
2021 J jnl
Jamming Detection With Subcarrier Blanking for 5G and Beyond in Industry 4.0 Scenarios.
CoRR
Leonardo Chiarello, Paolo Baracca, Karthik Upadhya, Saeed R. Khosravirad, Thorsten Wild
2021 B conf
Jamming Detection with Subcarrier Blanking for 5G and Beyond in Industry 4.0 Scenarios.
PIMRC
Leonardo Chiarello, Paolo Baracca, Karthik Upadhya, Saeed R. Khosravirad, Thorsten Wild
2021 — conf
Nonlinear Precoding for Quantized Outphasing RF Chains in Massive MIMO Systems.
VTC Spring
Karthik Upadhya, Stefan Wesemann
2019 Misc conf
On Achievable Rates for Massive Mimo System with Imperfect Channel Covariance Information.
ICASSP
Atchutaram K. Kocharlakota, Karthik Upadhya, Sergiy A. Vorobyov
2019 J jnl
On the Spectral Efficiency for Massive MIMO Systems With Imperfect Spacial Covariance Information.
CoRR
Atchutaram K. Kocharlakota, Karthik Upadhya, Sergiy A. Vorobyov
2018 J jnl
Covariance Matrix Estimation for Massive MIMO.
CoRR
Karthik Upadhya, Sergiy A. Vorobyov
2018 J jnl
Covariance Matrix Estimation for Massive MIMO.
IEEE Signal Process. Lett.
Karthik Upadhya, Sergiy A. Vorobyov
2018 J jnl
Downlink Performance of Superimposed Pilots in Massive MIMO Systems.
IEEE Trans. Wirel. Commun.
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2018 Misc conf
Low-Overhead Receiver-Side Channel Tracking for Mmwave Mimo.
ICASSP
Karthik Upadhya, Sergiy A. Vorobyov, Robert W. Heath Jr.
2017 J jnl
Superimposed Pilots Are Superior for Mitigating Pilot Contamination in Massive MIMO.
IEEE Trans. Signal Process.
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2017 Misc conf
Time-multiplexed / superimposed pilot selection for massive MIMO pilot decontamination.
ICASSP
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2017 — conf
Tracking abruptly changing channels in mmWave systems using overlaid data and training.
CAMSAP
Karthik Upadhya, Robert W. Heath Jr., Sergiy A. Vorobyov
2016 J jnl
A risk minimization framework for channel estimation in OFDM systems.
Signal Process.
Karthik Upadhya, Chandra Sekhar Seelamantula, K. V. S. Hari
2016 — conf
Downlink performance of superimposed pilots in massive MIMO systems in the presence of pilot contamination.
GlobalSIP
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2016 J jnl
Superimposed Pilots are Superior for Mitigating Pilot Contamination in Massive MIMO - Part I: Theory and Channel Estimation.
CoRR
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2016 J jnl
Superimposed Pilots are Superior for Mitigating Pilot Contamination in Massive MIMO: Part II - Performance Analysis and Hybrid System Design.
CoRR
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2016 Misc conf
Superimposed pilots: An alternative pilot structure to mitigate pilot contamination in massive MIMO.
ICASSP
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä
2015 — conf
An array processing approach to pilot decontamination for massive MIMO.
CAMSAP
Karthik Upadhya, Sergiy A. Vorobyov
2014 J jnl
A Risk Minimization Framework for Channel Estimation in OFDM Systems.
CoRR
Karthik Upadhya, Chandra Sekhar Seelamantula, K. V. S. Hari