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November 2020


It is well known that coherent light beams have an angular momentum associated with them. This is the well-known phenomenon of polarization and  is the direction of oscillation of the electric field of the electromagnetic wave.  In the quantum mechanical view of light, it  is associated with the intrinsic spin of the photons. From a communications engineering viewpoint, this enables two orthogonal channels in, for instance satellite television, thus doubling the channel capacity of a given frequency.

In recent years it has been recognized that there is another angular momentum associated with a coherent light beam. This is called orbital angular momentum (OAM) and is also associated with a quantum mechanical parameter. It corresponds to solutions to Maxwell’s equations with helical wavefronts and, unlike polarization, can, in principle, take infinitely many orthogonal states. The OAM of a coherent beam can be any integer. Creation of low integer OAM states is not very difficult with both metamaterials and computer generated holograms being used. Similar devices can be used to filter light beams to detect such states.

 The ability to reliably create and detect such states holds great potential for communications using electromagnetic waves, both in free space and in optic fibres. Effectively, it is possible to create a number of orthogonal communication channels at a given frequency in an optical fibre.

Our speaker will talk about the theoretical ideas behind this new technology, as well as a few practical aspects and uses in communications.


Bill Moran currently serves, since 2017, as Professor of Defence Technology in the University of Melbourne. From 2014 to 2017, he was Director of the Signal Processing and Sensor Control Group in the School of Engineering at RMIT University,  from 2001 to 2014,  a  Professor in the Department of Electrical Engineering, University of Melbourne, Director of Defence Science Institute  in University of Melbourne (2011-14), Professor of Mathematics (1976–1991), Head of the Department of Pure Mathematics (1977–79, 1984–86), Dean of Mathematical and Computer Sciences (1981, 1982, 1989) at the University of Adelaide, and Head of the Mathematics Discipline at the Flinders University of South Australia (1991–95). He was Head of the Medical Signal Processing Program (1995–99) in the Cooperative Research Centre for Sensor Signal and information Processing. He was a member of the Australian Research Council College of Experts from 2007 to 2009.  He was elected to the Fellowship of the Australian Academy of Science in 1984. He holds a Ph.D. in Pure Mathematics from the University of Sheffield, UK (1968), and a First Class Honours B.Sc. in Mathematics from the University of Birmingham (1965). He has been a Principal Investigator on numerous research grants and contracts, in areas spanning pure mathematics to radar development, from both Australian and US Research Funding Agencies, including DARPA, AFOSR, AFRL, Australian Research Council (ARC), Australian Department of Education, Science and Training, and Defence Science and Technology, Australia.  His main areas of research interest are in signal processing both theoretically and in applications to radar, waveform design and radar theory, sensor networks, and sensor management. He also works in various areas of mathematics including harmonic analysis, representation theory, and number theory.

October 2020


Recently, there have been several important regulatory actions in the United States in response to industry developments of the next generation of mobile technologies. Following the release of several GHz of spectrum in the mmwave and sub-mmwave ranges a few years ago, the US FCC embarked upon releasing additional spectrum in the mid-ranges to accelerate the expansion of 5G. These efforts, aside from being exceptionally expeditious, have used novel approaches to arrive at suitable regulatory solutions. From financial incentives to FSS operators in C-band to devising an Automated Frequency Coordination (AFC) vehicle in 6 GHz, these bold solutions are leading to several “first of its kind” solutions, paving the way towards taking full advantage of recent technological developments such as 5G and Wi-Fi 6E.

In this presentation, we look at background and outcome of the FCC’s proceedings related to these bands.

US Spectrum 28 October 2020


Reza Arefi leads Emerging Spectrum Strategies and Planning at Intel. In his role, he develops market-driven spectrum and regulatory strategies that support Intel’s existing and future wireless products. Reza has been actively contributing to standards and various industry and international regulatory groups since 1998, often in leadership roles. These included chairing various activities in ITU-R leading to development of several ITU-R Reports and Recommendations. Reza is currently Vice President of Global mobile Suppliers Association (GSA). Reza has made significant contributions to the development of 5G standards and technologies. He holds several patents in the areas of mm-wave technologies and spectrum sharing. He is a Senior Member of IEEE and has been an IEEE-SA member for more than ten years. He holds an EE bachelor’s degree from Sharif University of Technology and a master’s degree from West Virginia University.

September 2020


With video traffic accounting for more than 60% of the global downstream Internet traffic in 2019, video streaming represents a significant portion of inbound traffic to the home environment. Recently, the Internet Engineering Task Force (IETF) has standardised three Active Queue Management (AQM) schemes – PIE (RFC8033), CoDel (RFC8289) and FQ-CoDel (RFC8290). These schemes are being progressively deployed at the last-mile Internet Service Providers’ (ISP) end-points and home gateways to counteract bufferbloat and will likely impact consumer video streams. This talk presents the benefits of the emerging AQM schemes in broadband networks and their impact on video streaming traffic and an experimentally validated technique that has been proposed for improving streaming performance in typical consumer home broadband environments.


Jonathan Kua received the B.Eng. (First Class Hons.) degree in telecommunications and network engineering and the Ph.D. degree in telecommunications engineering from Swinburne University of Technology, in 2014 and 2019, respectively. He is currently Lecturer in Internet of Things within the School of Information Technology at Deakin University. His research interests are in the broad areas of computer systems and data networking, including network measurements, adaptive multimedia streaming, data transport protocols and bottleneck queue management techniques. He is also interested in emerging communication technologies for the Internet of Things, distributed computing and networked systems.


  • Date: 2 Sept 2020
  • Time: 12:30 PM to 01:45 PM
  • Registration:

The future of Hybrid Fibre Coax (HFC) is very important for Australia’s National Broadband Network (NBN), with HFC passing more than 3 million premises. In this presentation the speaker will discuss a potential future for the HFC, driven by the CableLabs’ “10G project”, leading to DOCSIS 4.0. The stages in an NBN upgrade and some of the likely barriers to implementation will be outlined. All this will be set in a context of changing end-user requirements and evolving network capabilities.


John Goddard  is a Managing Director at C-COR Broadband Australia Pty Ltd. John has over 45 years experience in the Radio, IT and Telecommunications, and HFC CATV industries, with more than fifteen years in direct engineering/support roles in Radio, Voice, Data and HFC networks including both Hardware and Software solutions, and more than thirty years in Senior Management/Executive and Executive Director roles. This experience has included both local and multinational experience with the RAAF, Wandel & Golterman, Dataplex, Philips Public Telecommunications Systems, and C-COR Inc., C-COR Broadband Australia Pty Ltd, where he has worked in Australia and AsiaPacific as Managing Director and Regional Director. C-COR Broadband now operates and has registered subsidiary offices in Singapore, Taiwan and Pakistan, and has a Sales Office in India. Following the management buy-out of C-COR Broadband Australia in 2006, John accepted the CEO role offered, becoming the head of his own company. He provides management and operational control, defining and mapping the strategic direction of the company. John holds a Diploma of Engineering (Telecommunications); a Diploma in Technical Teaching; a Bachelor of Education Studies; a Diploma in Business Administration; is a Member of the Australian Institute of Company Directors; a Fellow of the Australian Institute of Management (now IML), and is a member of TelSoc. Previously a member of The Society of Cable Telecommunication Engineers (SCTE Australia).

August 2020


The world and broadband now evolve to a new normal.  A centennial pandemic suddenly intensifies our broadband dependency and mandates more ubiquitous and reliable communication everywhere, including Australia’s NBN.   What does this mean for broadband evolution plans?  What must change?  What can change? Fiber to everyone’s wristwatch was never an economically viable solution, but there are paths that address need and viably advance into the new altered future.  Existing facilities’ combined intelligent leverage, and best use of advanced, powerful, and distributing computing can indeed provide viable solutions.  This talk investigates such paths, how to measure their advance, and suggests paths that transcend well into tomorrow’s New Broadband Normal.

Cioffi-Slides-26Aug2020-NBN 3.2


Dr. John M. Cioffi – (M76-SM94-F96): BSEE, 1978,  Illinois; PhDEE,  1984, Stanford;  Bell Laboratories, 1978-1984; IBM Research, 1984-1986; EE Prof., Stanford, 1986-present, now called emeritus.  Cioffi founded Amati Com. Corp in 1991 (purchased by TI in 1997) and was officer/director from 1991-1997.  He currently also is on the Board of Directors of ASSIA (Chairman and CEO), Alto Beam, Tinoq, and the Marconi Foundation. Cioffi’s specific interests are in high-performance digital transmission.      Cioffi’s recognition includes: IEEE AG Bell, Kirchmayer Graduate Teaching, and Millenium Medals (2010, 2014, and 2000); Internet (2014) and Consumer Electronics (2018) Halls of Fame; Economist Magazine 2010 Innovations Award (joint with S. Jobs); International Marconi Fellow (2006); Member, US National and UK Royal Academies of Engineering (2001, 2009); IEEE Kobayashi and Armstrong Awards (2001 and 2013); BBWF Lifetime Achievement (2014), IEEE Fellow (1996); IEE JJ Tomson Medal (2000); 1991 and 2007 IEEE Comm. Mag. best paper; and numerous Conference Best-Paper awards.  Cioffi has published over 800 papers and holds over 200 patents, of which many are heavily licensed including key necessary patents for the international standards in ADSL, VDSL, vectored VDSL,, DSM, Cellular 3GPP, Multi-user and Massive-MIMO wireless, and various Wi-Fi methodologies.

July 2020


In 5G networks, mobile service providers will support vertical slices of mobile applications to meet diverse service quality requirements, such as ultra-low latency, densely distributed users and high reliability. Meanwhile, wireless traffic is explosively growing, driven by widespread mobile communication devices and increasing popularity of mobile applications. The wireless network slicing technique, which is built on network function virtualization and software defined network schemes, will support wireless applications on substrate physical facilities with higher flexibility and lower cost.

A scheduling policy for wireless network slicing should maximize the energy efficiency of the network. (Here, we define energy efficiency as the ratio of long-run average throughput of user requests to the long-run average power consumption.) This is a problem of extremely high computational complexity, which prevents direct application of conventional optimization techniques. We have developed a policy called Most Energy-Efficient Resource First (MEERF), which is scalable and priority-based. MEERF is asymptotically optimal in a local wireless environment with highly dense user population and exponentially distributed service times. Our extensive simulations show the robustness of MEERF to different service time distributions. We also show the effectiveness of MEERF compared to benchmark policies in a more general network with potentially geographically distributed users and infrastructures.


Dr Jing Fu received the B.Eng. degree in computer science from Shanghai Jiao Tong University, Shanghai, China, in 2011, and the Ph.D. degree in electronic engineering from the City University of Hong Kong in 2016. She has been with the School of Mathematics and Statistics, the University of Melbourne, as a Post-Doctoral Research Associate from 2016 to 2019. She has been a lecturer in the discipline of Electronic & Telecommunications Engineering, RMIT University, since 2020. Her research interests now include energy-efficient networking/scheduling, resource allocation in large-scale networks, semi-Markov/Markov decision processes, restless multi-armed bandit problems, and stochastic optimization.

June 2020


The presentation will provide a brief introduction to 5G and what it means for electromagnetic (EMF) exposure based on the results of assessments of 5G networks (commercial and pilot) conducted in Australia and overseas.  The international EMF exposure guidelines were updated in March 2020 and one of the major changes was to provide more detailed guidance for frequencies above 6 GHz. Independent public health agencies say that no health risks are expected for 5G but myths and misinformation continue to be spread on social media, including suggestions of a link between wireless technologies and COVID-19. Pointers will be provided to reliable sources of information.



Dr Jack Rowley works in the Advocacy Programme of the GSMA where he is Senior Director, Research & Sustainability. He is responsible for activities related to the safety of mobile communications and responsible environmental practices. He manages relationships with major stakeholders, contributes to government consultations, develops technical advice for members, delivers specialist training and coordinates GSMA scientific and communications activities related to radiofrequency electromagnetic fields (RF-EMFs). Jack has more than 25 years of experience in the telecommunications industry and joined the GSMA in 2000. Previously, he worked for Telstra (Australia), primarily in the Research Laboratories. He holds a B. Eng. degree with first class honours from the University of Limerick (Ireland) and a Ph.D. from the RMIT University (Australia). He is a Senior Member of the IEEE and a member of the Bioelectromagnetics Society.