Karthik Upadhya

According to our database, Karthik Upadhya authored at least 23 papers between 2015 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

Heterogeneous Rank Beamforming for Industrial Communications.

Andrea Bedin, Akshay Jain, Andrea Zanella, Karthik Upadhya

CoRR, 2023

28 GHz NLOS Channel Measurements Revealing Low Path Loss and High Angular Spread in Container Ports.

Andrea Bedin, Dmitry Chizhik, Jinfeng Du, Martti Moisio, Karthik Upadhya, Reinaldo A. Valenzuela, Mikko A. Uusitalo

CoRR, 2023

2022

Digital Twins for Industry 4.0 in the 6G Era.

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

CoRR, 2022

Passive Reflectors for Enhancing Cellular UAV Coverage.

Karthik Upadhya, Kimmo Valkealahti, Martti Moisio, Dani Korpi, Tero Ihalainen, Mikko A. Uusitalo

Proceedings of the IEEE Wireless Communications and Networking Conference, 2022

Jamming Resilient Indoor Factory Deployments: Design and Performance Evaluation.

Leonardo Chiarello, Paolo Baracca, Karthik Upadhya, Saeed R. Khosravirad, Silvio Mandelli, Thorsten Wild

Proceedings of the IEEE Wireless Communications and Networking Conference, 2022

2021

Impact of Pilot Overhead and Channel Estimation on the Performance of Massive MIMO.

Atchutaram K. Kocharlakota, Karthik Upadhya, Sergiy A. Vorobyov

IEEE Trans. Commun., 2021

Extreme Communication in 6G: Vision and Challenges for 'in-X' Subnetworks.

Gilberto Berardinelli, Paolo Baracca, Ramoni O. Adeogun, Saeed R. Khosravirad, Frank Schaich, Karthik Upadhya, Dong Li, Tao Tao, Harish Viswanathan, Preben E. Mogensen

IEEE Open J. Commun. Soc., 2021

Nonlinear Precoding for Quantized Outphasing RF Chains in Massive MIMO Systems.

Karthik Upadhya, Stefan Wesemann

Proceedings of the 93rd IEEE Vehicular Technology Conference, 2021

Jamming Detection with Subcarrier Blanking for 5G and Beyond in Industry 4.0 Scenarios.

Leonardo Chiarello, Paolo Baracca, Karthik Upadhya, Saeed R. Khosravirad, Thorsten Wild

Proceedings of the 32nd IEEE Annual International Symposium on Personal, 2021

2019

On the Spectral Efficiency for Massive MIMO Systems With Imperfect Spacial Covariance Information.

Atchutaram K. Kocharlakota, Karthik Upadhya, Sergiy A. Vorobyov

CoRR, 2019

On Achievable Rates for Massive Mimo System with Imperfect Channel Covariance Information.

Atchutaram K. Kocharlakota, Karthik Upadhya, Sergiy A. Vorobyov

Proceedings of the IEEE International Conference on Acoustics, 2019

2018

Downlink Performance of Superimposed Pilots in Massive MIMO Systems.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

IEEE Trans. Wirel. Commun., 2018

Covariance Matrix Estimation for Massive MIMO.

Karthik Upadhya, Sergiy A. Vorobyov

IEEE Signal Process. Lett., 2018

Low-Overhead Receiver-Side Channel Tracking for Mmwave Mimo.

Karthik Upadhya, Sergiy A. Vorobyov, Robert W. Heath Jr.

Proceedings of the 2018 IEEE International Conference on Acoustics, 2018

2017

Superimposed Pilots Are Superior for Mitigating Pilot Contamination in Massive MIMO.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

IEEE Trans. Signal Process., 2017

Time-multiplexed / superimposed pilot selection for massive MIMO pilot decontamination.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

Proceedings of the 2017 IEEE International Conference on Acoustics, 2017

Tracking abruptly changing channels in mmWave systems using overlaid data and training.

Karthik Upadhya, Robert W. Heath Jr., Sergiy A. Vorobyov

Proceedings of the 2017 IEEE 7th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, 2017

2016

A risk minimization framework for channel estimation in OFDM systems.

Karthik Upadhya, Chandra Sekhar Seelamantula, K. V. S. Hari

Signal Process., 2016

Superimposed Pilots are Superior for Mitigating Pilot Contamination in Massive MIMO: Part II - Performance Analysis and Hybrid System Design.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

CoRR, 2016

Superimposed Pilots are Superior for Mitigating Pilot Contamination in Massive MIMO - Part I: Theory and Channel Estimation.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

CoRR, 2016

Superimposed pilots: An alternative pilot structure to mitigate pilot contamination in massive MIMO.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

Proceedings of the 2016 IEEE International Conference on Acoustics, 2016

Downlink performance of superimposed pilots in massive MIMO systems in the presence of pilot contamination.

Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkaperä

Proceedings of the 2016 IEEE Global Conference on Signal and Information Processing, 2016

2015

An array processing approach to pilot decontamination for massive MIMO.

Karthik Upadhya, Sergiy A. Vorobyov

Proceedings of the 6th IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, 2015