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Going 6G

New Sub Terahertz R&D Testbed for 6G Research

Recorded Webinar
September 22, 2021
Presented by Greg Jue, Keysight Technologies


Sub-Terahertz (sub-THz) frequencies (100-300 GHz) with extreme modulation bandwidths are part of early 6G research. This presents many unknowns. One of those unknowns is exploring the level of system performance that is achievable and reasonable given new frequency bands, extreme modulation bandwidths, and new waveforms. This webinar will provide insight into this by discussing new sub- terahertz system-level design and test challenges presented by 6G. EVM measurement results at 140 GHz will be shown with varying waveforms and bandwidths up to an occupied bandwidth of 10 GHz. Low Signal-to-Noise (SNR) ratios are a challenge for wide bandwidth waveforms at sub-THz frequencies. Preamble and pilot-aided synchronization and channel estimation will be discussed to achieve more robust demodulation in low SNR environments. Understanding and addressing channel impairments at sub-THz frequencies will be another challenge. Sub-THz channel sounding will be discussed and the testbed receiver will be customized with a real-time adaptive equalizer FPGA implementation to address channel impairments.


Greg Jue is a 6G System Engineer at Keysight Technologies working on emerging millimeter-wave applications beyond 110 GHz. Greg authored Keysight’s new whitepaper “A New Sub-Terahertz Testbed for 6G Research”, and was a technical contributor to Keysight’s new “Engineering the 5G World” ebook. Greg wrote the design simulation section in Agilent Technologies LTE book, and has authored numerous articles, presentations, application notes, and whitepapers including Keysight’s “Implementing a Flexible Testbed for 5G Waveform Generation and Analysis”. Before joining HP/Agilent, Greg worked on system design for the Deep Space Network at the Jet Propulsion Laboratory, Caltech University.

Advancing THz Technology

THz Technology: The Move from Scientific to Commercial Applications – 6G, Space & More

Recorded Webinar
August 4, 2021
Presented by Jeffrey L Hesler, Virginia Diodes

The Terahertz field has long been used for a wide variety of scientific applications, ranging from radio astronomy, spectroscopy, fusion plasma diagnostics, and more. The potential of non-scientific applications of THz has been understood for many years, but technological limits slowed the advance of these applications. The past decade has seen dramatic advances in transistor technology that is now enabling rapid progress in a variety of applications, ranging from basic test & measurement, ultra-wideband communications, and the use of THz radiometers in space for next generation commercial weather forecasting. This talk will describe the various THz technologies involved, and give examples of recent projects at Virginia Diodes aimed at advancing THz technology for both scientific and commercial applications.

Jeffrey L Hesler is the Chief Technology Officer of Virginia Diodes and has a visiting position at the University of Virginia. For more than 25 years he has been working on creating new technologies that utilize the Terahertz (THz) frequency band for scientific, defense, and industrial applications. He has published over 200 technical papers in journals and international conferences proceedings, is a member of IEEE Technical Committee MTT-21 (THz Technology and Applications) and is a co-Editor of the IEEE Transactions on Terahertz Science and Technology. Terahertz systems based on his innovative designs are now used in hundreds of research laboratories throughout the world.

View more videos from Virginia Diodes: https://www.vadiodes.com/en/resources/videos

Spectrum Frontiers: Terahertz

Recorded Webinar
February 17, 2021
Presented by Professor Theodore Rappaport, NYU WIRELESS

Presentation by Professor Theodore (Ted) Rappaort to the member companies of the NYU WIRELESS Industrial Affiliates Program. In this mini-lecture series Ted gives an overview of the expansion of communications into the Terahertz frequency spectrum.

Summaries of the results of experiments at the NYU campus provide insight into the development of communications potential at these very high frequencies (100++ GHz). Also discussed are the required behaviors of antennas, and the need to study the important topic of potential safety aspects of these higher frequencies.

As Ted says, “There is clear sailing up to 800 GHz.”

To learn more, see these links

[1] Y. Xing and T. S. Rappaport, “Terahertz Wireless Communications: Research Issues and Challenges for Active and Passive Systems in Space and on the Ground above 100 GHz (Invited Paper),” submitted to 2021 IEEE Communications Letters, Feb. 2021, pp. 1-5. https://arxiv.org/abs/2103.00604

[2] Y. Xing, T. S. Rappaport, and A. Ghosh, “Millimeter Wave and sub-THz Indoor Radio Propagation Channel Measurements, Models, and Comparisons in an Office Environment (Invited Paper),” submitted to 2021 IEEE Communications Letters, Feb. 2021, pp. 1-5. https://arxiv.org/abs/2103.00385

[3] Y. Xing and T. S. Rappaport, “Propagation Measurements and Path Loss Models for sub-THz in Urban Microcells,” 2021 IEEE International Conference on Communications, June 2021, pp. 1-6. https://arxiv.org/pdf/2103.01151.pdf

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