My Ph.D. reserach aims to bring in-band full-duplex capability to millimeter wave communication systems by combining theory, measurements, and practical knowledge.

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Preprint

STEER: Beam Selection for Full-Duplex Millimeter Wave Communication Systems
by I. P. Roberts, A. Chopra, T. Novlan, S. Vishwanath, and J. G. Andrews
Submitted to IEEE Transactions on Communications, February 2022
Using beam alignment to deliver high beamforming gain and mitigate self-interference in full-duplex mmWave systems.
(Limited release prior to publication; preprint available upon request.)

System-Level Analysis of Full-Duplex Self-Backhauled Millimeter Wave Networks
by M. Gupta, I. P. Roberts, and J. G. Andrews
Submitted to IEEE Transactions on Wireless Communications, December 2021
Examining the rate and latency improvements introduced by full-duplex in IAB networks.
[PDF] [arXiv]

Self-Interference Channel Measurements at 28 GHz: Spatial Insights and Angular Spread
by I. P. Roberts, A. Chopra, T. Novlan, S. Vishwanath, and J. G. Andrews
Submitted to IEEE Transactions on Wireless Communications, October 2021
An extensive measurement campaign of self-interference in mmWave systems.
(Limited release prior to publication; preprint available upon request.)

Journal and Magazine

Hybrid Beamforming for Millimeter Wave Full-Duplex under Limited Receive Dynamic Range
by I. P. Roberts, J. G. Andrews, and S. Vishwanath
IEEE Transactions on Wireless Communications, June 2021
A beamforming design for mmWave full-duplex that prevents self-interference from saturating receive components.
[PDF] [IEEE] [arXiv]

Millimeter-Wave Full Duplex Radios: New Challenges and Techniques
by I. P. Roberts, J. G. Andrews, H. B. Jain, and S. Vishwanath
IEEE Wireless Communications Magazine, February 2021
Outlining key system-level challenges, unknowns, and potential solutions for mmWave full-duplex.
[PDF] [IEEE] [arXiv]

Conference

28 GHz Phased Array-Based Self-Interference Measurements for Millimeter Wave Full-Duplex
by A. Chopra, I. P. Roberts, T. Novlan, and J. G. Andrews
IEEE WCNC, April 2022
Spatially dense measurements of self-interference in full-duplex mmWave systems.
[PDF] [IEEE] [arXiv] [YouTube] [slides]

Millimeter Wave Analog Beamforming Codebooks Robust to Self-Interference
by I. P. Roberts, H. B. Jain, S. Vishwanath, and J. G. Andrews
IEEE GLOBECOM, December 2021
A design methodology for codebooks that offer high beamforming gain while minimizing self-interference.
[PDF] [IEEE] [arXiv] [YouTube]

Downlink Analysis of LEO Multi-Beam Satellite Communication in Shadowed Rician Channels
by E. Kim, I. P. Roberts, P. A. Iannucci, and J. G. Andrews
IEEE GLOBECOM, December 2021
An examination and simulation of signal and interference in LEO satellite communication systems under Shadowed Rician channels.
[PDF] [IEEE] [arXiv]

MIMO for MATLAB: A Toolbox for Simulating MIMO Communication Systems
by I. P. Roberts
arXiv, November 2021
A MATLAB toolbox for simulating MIMO communication systems at the symbol-level.
[PDF] [arXiv]

Collision Detection in Dense Wi-Fi Networks using Self-Interference Cancellation
by R. K. Mishra, Y. Chen, I. P. Roberts, and S. Vishwanath
IEEE ICC Workshops, June 2020
A method to improve dense network performance by leveraging self-interference cancellation to detect and avoid collisions.
[PDF] [IEEE]

Equipping Millimeter-Wave Full-Duplex with Analog Self-Interference Cancellation
by I. P. Roberts, H. B. Jain, and S. Vishwanath
IEEE ICC Workshops, June 2020
Examining how analog self-interference cancellation can supplement beamforming cancellation to enable mmWave full-duplex.
[PDF] [IEEE] [arXiv] [YouTube] [slides]

Frequency-Selective Beamforming Cancellation Design for Millimeter-Wave Full-Duplex
by I. P. Roberts, H. B. Jain, and S. Vishwanath
IEEE ICC, June 2020
Extending our beamforming cancellation design for mmWave full-duplex to frequency-selective settings.
[PDF] [IEEE] [arXiv] [YouTube] [slides]

Enabling In-Band Coexistence of Millimeter-Wave Communication and Radar
by H. B. Jain, I. P. Roberts, and S. Vishwanath
IEEE RADAR, April 2020
A first look at how concepts of mmWave full-duplex can enable in-band coexistence of communication and radar.
[PDF] [IEEE] [arXiv] [YouTube] [slides]

Beamforming Cancellation Design for Millimeter-Wave Full-Duplex
by I. P. Roberts and S. Vishwanath
IEEE GLOBECOM, December 2019
Enabling in-band full-duplex at mmWave via strategic MIMO precoding and combining.
[PDF] [IEEE] [arXiv] [slides]

Acknowledgment

Much of my work beginning Fall 2020 is supported by the National Science Foundation Graduate Research Fellowship Program (Grant No. DGE-1610403). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. I appreciate their support of my graduate research and studies.

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