Krishan Kumar Tiwari

Email

tiwari@tu-berlin.de

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Office

HFT

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Profile

Research interests

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ORCID

0000-0001-5986-2121

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TU Berlin vCard

tu.berlin/vcard

• Artificial Magnetic Conductor Frame to Improve Impedance Matching and Radiation Symmetry in 2$\times$2 Array for 6G Applications

  Edoardo Giusti, Krishan Kumar Tiwari, C. J. Reddy, Danilo Brizi, Agostino Monorchio, Giuseppe Caire

  ArXiv.org · 2026

  arxiv.orgBibTeX

• Codebook Design and Baseband Precoding for Pragmatic Array-Fed RIS Hybrid Multiuser MIMO

  Krishan Kumar Tiwari, Giuseppe Caire

  ArXiv.org · 2026

  arxiv.orgarxiv.orgBibTeX

• An Efficient, Modular, and Pragmatic Array-Fed RIS Architecture for Multiuser MIMO

  Krishan Kumar Tiwari, Giuseppe Caire

  IEEE Trans. Wirel. Commun. · 2026

  IEEE XploreBibTeX

• Artificial Magnetic Conductor Frame to Improve Impedance Matching and Radiation Symmetry in 2\unicode107612 Array for 6G Applications

  Edoardo Giusti, Krishan Kumar Tiwari, C. J. Reddy, Danilo Brizi, Agostino Monorchio, Giuseppe Caire

  CoRR · 2026

  arxiv.orgBibTeX

• Array-Fed RIS: Validation of Friis-Based Modeling Using Full-Wave Simulations

  Krishan Kumar Tiwari, Thomas Flisgen, W. Heinrich, G. Caire

  ArXiv.org · 2025

  arxiv.orgDOIBibTeX

• Flat-Top Beamforming with Efficient Array-Fed RIS

  Krishan Kumar Tiwari, Giuseppe Caire

  ArXiv.org · 2025

  arxiv.orgBibTeX

• A Modular Pragmatic Architecture for Multiuser MIMO with Array-Fed RIS

  Krishan Kumar Tiwari, Giuseppe Caire

  arXiv (Cornell University) · 2024

  arxiv.orgBibTeX

• Power Transfer between Two Antenna Arrays in the Near Field

  Krishan Kumar Tiwari, G. Caire

  99th IEEE Vehicular Technology Conference, VTC Spring 2024, Singapore, June 24-27, 2024 · 2024· 4 citations

  IEEE XploreBibTeX

• RIS-Based Steerable Beamforming Antenna with Near-Field Eigenmode Feeder

  Krishan Kumar Tiwari, Giuseppe Caire

  2023

  IEEE XploreBibTeX

• A New Old Idea: Beam-Steering Reflectarrays for Efficient Sub-THz Multiuser MIMO

  Krishan Kumar Tiwari, Giuseppe Caire

  CoRR · 2023

  arxiv.orgTechRxivBibTeX

• Power Transfer between Two Antenna Arrays in the Near Field

  Krishan Kumar Tiwari, Giuseppe Caire

  IEEE Vehicular Technology Conference · 2023

  arxiv.orgarxiv.orgBibTeX

• On the Behavior of the Near-Field Propagation Matrix between two Antenna Arrays, with Applications to RIS-Based Over-the-Air Beamforming

  Krishan Kumar Tiwari, Giuseppe Caire

  2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring) · 2022· 6 citations

  IEEE XploreBibTeX

• Rate Loss due to Beam Cusping in Grid of Beams

  Krishan Kumar Tiwari, Giuseppe Caire

  2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall) · 2022· 2 citations

  PDFIEEE XploreBibTeX

• RIS-Based Steerable Beamforming Antenna with Near-Field Eigenmode Feeder

  Krishan Kumar Tiwari, Giuseppe Caire

  arXiv (Cornell University) · 2022

  arxiv.orgarxiv.orgBibTeX

• MAC Layer Beamforming: Rate Loss due to Beam Cusping

  Krishan Kumar Tiwari, David Laurenson, Eckhard Grass, John Thompson, Ivan Ndip, Michael Kaiser

  2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall) · 2021· 4 citations

  IEEE XploreBibTeX

• Noise Performance of Orthogonal RF Beamforming for THz Radio Communications

  Krishan Kumar Tiwari, Eckhard Grass, Rolf Kraemer

  2019· 6 citations

  IEEE XploreBibTeX

• Beam Entropy of 5G Cellular Millimetre-Wave Channels

  Krishan Kumar Tiwari, Eckhard Grass, John Thompson, Rolf Kraemer

  2019· 3 citations

  arxiv.orgBibTeX

• Monopulse-based THz Beam Tracking for Indoor Virtual Reality Applications

  Krishan Kumar Tiwari, Vladica Sark, Eckhard Grass, Rolf Kraemer

  arXiv (Cornell University) · 2019· 1 citations

  arxiv-export-lb.library.cornell.eduBibTeX

• Noise Performance of Orthogonal RF Beamforming for Millimetre Wave Massive MIMO Communication Systems

  Krishan Kumar Tiwari, John Thompson, Eckhard Grass

  2018· 4 citations

  IEEE XploreBibTeX