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Karthik Upadhya
Karthik Upadhya
Senior researcher, Nokia Bell Labs
Verified email at nokia-bell-labs.com
Title
Cited by
Cited by
Year
Superimposed Pilots Are Superior for Mitigating Pilot Contamination in Massive MIMO
K Upadhya, SA Vorobyov, M Vehkapera
IEEE Transactions on Signal Processing 65 (11), 2917-2932, 2017
962017
Covariance matrix estimation for massive MIMO
K Upadhya, SA Vorobyov
IEEE Signal Processing Letters 25 (4), 546-550, 2018
372018
Superimposed pilots: An alternative pilot structure to mitigate pilot contamination in massive MIMO
K Upadhya, SA Vorobyov, M Vehkapera
2016 IEEE International Conference on Acoustics, Speech and Signal …, 2016
252016
Downlink performance of superimposed pilots in massive MIMO systems
K Upadhya, SA Vorobyov, M Vehkaperä
IEEE Transactions on Wireless Communications 17 (10), 6630-6644, 2018
23*2018
Downlink performance of superimposed pilots in massive MIMO systems in the presence of pilot contamination
K Upadhya, SA Vorobyov, M Vehkapera
2016 IEEE Global Conference on Signal and Information Processing (GlobalSIP …, 2016
132016
An array processing approach to pilot decontamination for massive MIMO
K Upadhya, SA Vorobyov
2015 IEEE 6th International Workshop on Computational Advances in Multi …, 2015
122015
Tracking abruptly changing channels in mmWave systems using overlaid data and training
K Upadhya, RW Heath, SA Vorobyov
2017 IEEE 7th International Workshop on Computational Advances in Multi …, 2017
72017
Extreme Communication in 6G: Vision and Challenges for ‘in-X’Subnetworks
G Berardinelli, P Baracca, RO Adeogun, SR Khosravirad, F Schaich, ...
IEEE Open Journal of the Communications Society, 2021
62021
A risk minimization framework for channel estimation in OFDM systems
K Upadhya, CS Seelamantula, KVS Hari
Signal Processing 128, 78-87, 2016
62016
Jamming Detection With Subcarrier Blanking for 5G and Beyond in Industry 4.0 Scenarios
L Chiarello, P Baracca, K Upadhya, SR Khosravirad, T Wild
arXiv preprint arXiv:2106.07970, 2021
32021
On Achievable Rates for Massive Mimo System with Imperfect Channel Covariance Information
AK Kocharlakota, K Upadhya, SA Vorobyov
ICASSP 2019-2019 IEEE International Conference on Acoustics, Speech and …, 2019
32019
Low-Overhead Receiver-Side Channel Tracking for Mmwave Mimo
K Upadhya, SA Vorobyov, RW Heath
2018 IEEE International Conference on Acoustics, Speech and Signal …, 2018
32018
Time-multiplexed/superimposed pilot selection for massive MIMO pilot decontamination
K Upadhya, SA Vorobyov, M Vehkapera
2017 IEEE International Conference on Acoustics, Speech and Signal …, 2017
32017
Jamming Resilient Indoor Factory Deployments: Design and Performance Evaluation
L Chiarello, P Baracca, K Upadhya, SR Khosravirad, S Mandelli, T Wild
arXiv preprint arXiv:2202.01272, 2022
22022
Channel Estimation in Large-Scale Multi-Antenna Systems for 5G and Beyond-Novel Pilot Structures and Algorithms
K Upadhya
Aalto University, 2018
12018
Radio frequency transmission chains
K Upadhya, C Nuzman, A Ashikhmin, S Wesemann, H Yang
US Patent App. 17/471,438, 2022
2022
Impact of Pilot Overhead and Channel Estimation on the Performance of Massive MIMO
AK Kocharlakota, K Upadhya, SA Vorobyov
IEEE Transactions on Communications, 2021
2021
Determining Target Positions of Mobile Devices
K Upadhya, M Moisio, D Korpi, T Ihalainen, M Uusitalo
US Patent App. 17/191,804, 2021
2021
Radio frequency transmission
K Upadhya, S Wesemann
US Patent App. 17/183,772, 2021
2021
Nonlinear Precoding for Quantized Outphasing RF Chains in Massive MIMO Systems
K Upadhya, S Wesemann
2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), 1-6, 2021
2021
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