Dr Timothy Pelham

Dr Timothy Pelham

UK IC Postdoctoral Research Fellow

Publications

Spatial Modelling for GPS Replication in Natural and Urban Canyons

Published in Operating in the Future Electromagnetic Environment Symposium, 2023

Global Navigation Satellite System (GNSS) data has become a stable of modern life, whether delivered through a smartphone, vehicle, or as part of an industrial dataset. The expectation of reliable position and time information, irrespective of the environment, becomes challenging in tunnels and canyons with significant multipath, whether natural or urban. An initial look at an open dataset of LIDAR, Computer Vision, and GNSS data is presented, combined with a channel model produced from this dataset, comparing the expected and measured line of sight and multipath contributions from GPS sources while moving around Bristol, from unobstructed surroundings to deep natural and urban canyons.

Recommended citation: Pelham, T. G., (2023). Spatial Modelling for GPS Replication in Natural and Urban Canyons. Operating in the Future Electromagnetic Environment Symposium - 2023

Spatial Fingerprinting for Future Self Securing Networks

Published in Operating in the Future Electromagnetic Environment Symposium, 2023

The electromagnetic environment represents a consistently open RF attack surface. Spatial fingerprinting is proposed as a fusion of spatial intelligence, onboard electromagnetic modelling and machine learning to allow nodes within a network to identify and localise transmitters in their locality . This capability forms the basis of reciprocal trust networks between nodes in a node work, enabling self securing behaviour, and the identification and localisation of unauthorised transmitters attempting to penetrate the network. This process is demonstrated using modelled and measured data of LoRa network packets with an Anechoic Chamber, allowing for complete modelling of the scattering environment within the spatial intelligence node, and localisation of the transmitters.

Recommended citation: Pelham, T. G., (2023). Spatial Fingerprinting for Future Self Securing Networks. Operating in the Future Electromagnetic Environment Symposium - 2023

LyceanEM: A python package for virtual prototyping of antenna arrays, time and frequency domain channel modelling

Published in The Journal of Open Source Software, 2023

Demonstration of the workflow for rapid antenna array design and analysis using LyceanEM

Recommended citation: Pelham, T. G., (2023). LyceanEM: A python package for virtual prototyping of antenna arrays, time and frequency domain channel modelling. Journal of Open Source Software, 8(86), 5234, https://doi.org/10.21105/joss.05234 https://joss.theoj.org/papers/10.21105/joss.05234#

Royal Academy of Engineering Research Forum

Published in Royal Academy of Engineering Research Forum 2022, London, 2022

Vision to Radio, Computer Vision based Spatial Modelling for future Networks

Recommended citation: T. G. Pelham

Reflector Analysis for Novel OTA Test Method

Published in 15th European Conference on Antennas and Propagation, 2021

This paper is part of a new series on over the air test (OTA) techniques at 26GHz.

Recommended citation: A. L. Freire, T. G. Pelham, G. Hilton, M. Beach

Experimental evaluation of 3D printed spiral phase plates for enabling an orbital angular momentum multiplexed radio system

Published in Royal Society Open Science, 2019

This paper is about evaluating 3D printed spiral phase plates for generating orbital angular momentum modes

Recommended citation: Allen B., Pelham T., Wu Y., Drysdale T., Isakov D., Gamlath C., Stevens C. J., Hilton G., Beach M. A. and Grant P. S. (2019) "Experimental evaluation of 3D printed spiral phase plates for enabling an orbital angular momentum multiplexed radio system" Royal Society Open Science https://royalsocietypublishing.org/doi/10.1098/rsos.191419

Polarimetric Diffuse Scattering Channel Measurements at 26 GHz and 60 GHz

Published in Annual International Symposium on Personal, Indoor and Mobile Radio Communications, 2018

This paper covers polarimetric multiband measurements of urban multipath propagation

Recommended citation: A. L. Freire, T. Pelham, D. Kong, L. Sayer, V. Sgardoni, F. Tila, E. Mellios, M. Beach, A. Nix, G. Steinböck, "Polarimetric Diffuse Scattering Channel Measurements at 26 GHz and 60 GHz," 2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Bologna, 2018, pp. 210-214, doi: 10.1109/PIMRC.2018.8581035.

Non-intrusive characterization of 60GHz antenna array, using packet measurements

Published in European Conference on Antennas and Propagation, 2018

This paper is introduces a convenient method for characterization of integrated antenna arrays using packed measurements

Recommended citation: T. G. Pelham, D. Reyes, M. Beach, E. Mellios and M. Rumney, "Non-intrusive characterization of 60GHz antenna array, using packet measurements," 12th European Conference on Antennas and Propagation (EuCAP 2018), London, 2018, pp. 1-3, doi: 10.1049/cp.2018.1045.

Link performance evaluation for mm-Wave systems

Published in European Conference on Networks and Communications (EuCNC), 2017

This paper is about modelling antenna elements within a reconfigurable conformal framework.

Recommended citation: V. Kalokidou, T. Pelham, M. Beach, P. Legg and A. Lunness, &quotLink performance evaluation for mm-Wave systems ", 2017 European Conference on Networks and Communications (EuCNC), Oulu, 2017, pp. 1-5, doi: 10.1109/EuCNC.2017.7980712.

Predicting Conformal Aperture Gain From 3-D Aperture and Platform Models

Published in IEEE Antennas and Wireless Propagation Letters, 2016

This paper is about predicting the on platform performance envelope for conformal antenna arrays

Recommended citation: T. Pelham, G. Hilton, E. Mellios and R. Lewis, "Predicting Conformal Aperture Gain From 3-D Aperture and Platform Models" IEEE Antennas and Wireless Propagation Letters, vol. 16, pp. 700-703, 2017, doi: 10.1109/LAWP.2016.2600403 .

Conformal antenna array modelling, FDTD predictions and measurements for Dual Circular Patch in Variable Geometry Conformal Antenna Array Test Rig

Published in 10th European Conference on Antennas and Propagation, 2016

This paper is about modelling antenna elements within a reconfigurable conformal framework.

Recommended citation: T. G. Pelham, G. Hilton, E. Mellios, C. Railton and R. Lewis, "Conformal antenna array modelling, FDTD predictions and measurements for Dual Circular Patch in Variable Geometry Conformal Antenna Array Test Rig, " 2016 10th European Conference on Antennas and Propagation (EuCAP), Davos, 2016, pp. 1-4, doi: 10.1109/EuCAP.2016.7481683.

Predicting conformal aperture directivity for arbitrary curved surfaces

Published in Wideband and Multi-Band Antennas and Arrays for Civil, Security and Military Applications, 2015

This paper investigates an extension of Hannans equation for the maximum achievable directivity of a planar aperture

Recommended citation: T. Pelham, G. Hilton, E. Mellios and R. Lewis, "Predicting conformal aperture directivity for arbitrary curved surfaces," Wideband and Multi-Band Antennas and Arrays for Civil, Security & Military Applications, London, 2015, pp. 1-3, doi: 10.1049/ic.2015.0147.

FDTD model performance analysis for a Cavity Slot Antenna array in a variable geometry conformal test rig

Published in IEEE International Symposium on Antennas and Propagation, 2015

This paper is about modelling antenna elements within a reconfigurable conformal framework, with reference to measurements of the same

Recommended citation: T. G. Pelham, G. Hilton, C. Railton and R. Lewis, "FDTD model performance analysis for a Cavity Slot Antenna array in a variable geometry conformal test rig," 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Vancouver, BC, 2015, pp. 1836-1837, doi: 10.1109/APS.2015.7305307.

Variable Geometry Conformal Antenna Array for Element Comparison

Published in Vehicular Technology Conference, 2015

This paper is about modelling antenna elements within a reconfigurable conformal framework.

Recommended citation: T. G. Pelham, G. Hilton, R. Lewis and C. Railton, "Variable Geometry Conformal Antenna Array for Element Comparison," 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), Glasgow, 2015, pp. 1-5, doi: 10.1109/VTCSpring.2015.7146157. http://lyceanem.github.io/files/07146157.pdf

Simulation of d(7Be,t)6Be with Fresco, and investigation of resonant states of 6Be

Published in Annual Meeting of the Division of Nuclear Physics, 2008

This paper is about modelling antenna elements within a reconfigurable conformal framework.

Recommended citation: T. G. Pelham, "Simulation of d(7Be,t)6Be with Fresco, and investigation of resonant states of 6Be " 2008 Annual Meeting of the Division of Nuclear Physics, http://meetings.aps.org/link/BAPS.2008.DNP.DA.78