Turning Full-Duplex Radio Into Reality

Brought to you by The Radio Technology Group

Ever since the beginnings of wireless it has been an article of faith that radio transceivers can’t transmit and receive at the same frequency simultaneously, but over the years that dogma has been challenged.

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About the event

This insightful event will bring together speakers involved in FD research internationally, explore the circuit techniques and signal-processing algorithms required, and give the audience a chance to see full-duplex in action.

Back in the 1970s Plessey launched Groundsat which was an on-channel repeater for combat net radio; and a few years later “division-free” duplexing was proposed for Personal Communications Networks.  Now finally, “full duplex” wireless is starting to make headway as advances in analogue and digital signal processing make it possible to cancel out the severe self-interference it causes.  The benefit it could bring is significantly better spectrum efficiency, and potentially, paradoxically, simplified multi-band RF circuitry.  Full duplex has been proposed for wireless LANs, as an element of in-band relays for small cells, and most recently a technique for downlink capacity improvement in LTE might depend on full-duplex radio operation.  Furthermore, full-duplex techniques applied to frequency-division duplex radios could make the multi-band LTE “world phone” a reality.

You can follow @cambwireless on Twitter and tweet about this event using #CWRadioTech.

Sponsored by Rohde and Schwarz

Rohde & Schwarz is one of the world's leading manufacturers of information and communications technology products for professional users.

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Hosted by University of Bristol (Communication Systems & Networks Research Group)

The Communication Systems & Networks Group was formed in 1985. It performs fundamental academic research with strong levels of industrial application.

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Supported by SETSquared

The SETsquared Partnership is the enterprise collaboration

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The information supplied below may be subject to change before the event.


Registration and networking over lunch


Introduction to Radio Technology SIG from John Haine, u-blox AG


Welcome from host, Mark Beach, Manager, CDT in Communications, University of Bristol


Welcome from John Crute, CEO, The Technology Academy on behalf of sponsor, Rohde & Schwarz


Division Free Duplex in Small Form Factors; Leo Laughlin, PhD Student, University of Bristol

Full duplex transceiver technology will only be deployed in future mobile devices if the self-interference cancellation hardware can meet the demanding low-cost and small form factor requirements of handset applications. Electrical Balance Duplexing enables simultaneous transmission and reception from a single antenna, making it an attractive choice for duplexing in mobile devices. In this talk we present our prototype full-duplex transceiver which combines Electrical Balance Isolation with active analogue cancellation to provide high transmit-to-receive isolation over wide bandwidths using low cost small form factor technologies.




Addressing the LTE Bandwidth Challenge on Small Mobile Terminals: One World, One Radio; Samantha Caporal Del Barrio, Industrial Post-Doc, Aalborg University and WiSpry

This talk concerns frequency-reconfigurable antennas with the aim of addressing the challenge of band proliferation for small mobile terminals. This challenge arose with the worldwide standardization of Long Term Evolution (LTE). Designing a worldwide LTE phone (i.e. a world-phone) with conventional techniques reaches the limit of component integration, given the very tight platforms of typical smart-phones. A shift in architecture is required in order to cover the bandwidth needed for worldwide LTE roaming.




MAC Protocol for In-Band Full-duplex Systems;Dr Mir Ghoraishi, Project Leader 5G Testbed and Proof-of-Concept, Institute for Communication Systems (ICS), University of Surrey

Full-duplex radio has attracted a lot of attention in recent years and with the introduction of novel selfinterference techniques it is proved that the in-band full-duplex operation is possible. Before a fundamental rethinking of the way wireless networks are designed however, the system cannot enjoy the benefits of the full-duplex operation. Specifically, an accurate model for multiple access (MAC) protocol needs to be devised to translate the physical layer full-duplex gains into the overall network improvements. The MAC protocol design for full-duplex is an open area of research which is going to be of interest to both the
industry and the academia as this technology matures in the next few years. This talk will provide an
overview of the topic including related recent works.




Refreshments and Networking


Orbital Angular Momentum Radio: A new possibility for Full Duplex Radio?collaborative work with Alan Tennant, University of Sheffield); Ben Allen, Visiting Fellow, Department of Engineering Science, University of Oxford

Recently Orbital Angular Momentum Radio (OAM-Radio) has been shown to provide huge gains in spectral efficiency for line-of-sight radio links. This has been achieved by means of either using antenna arrays and signal coding (akin to MIMO) or circular phase plates to provide the required signal profile. It may also be possible to use this concept towards enabling full-duplex radio by using the filtering function at the OAM-radio receiver.
This talk introduces and reviews recent work on OAM-radio and then explores the possibility of applying it in the context of full-duplex radio




Operators perspective on full-duplex; David Lister, Research Manager, Vodafone UK

This talk will be discussing the use-cases under which full-duplex can be applied and some of the challenges that will emerge when applied to a system with multiple base stations and terminals.




Air Division Duplexing doubles Transmission Capacity for Microwave Backhaul; Geoff Carey, Director, MIMOtech

The application of full duplex radio techniques as an alternative to line of sight MIMO brings a new dimension to ultra-high capacity transmission for microwave backhaul. MIMOtech has realised a backhaul radio system using the Air Division Duplexing technique to achieve simultaneous transmission and reception on the same frequency. This talk will cover the solution and look at the advantages and challenges of the technology.




Panel session with all speakers chaired by SIG Champion, Diego Giancola, PA Consulting Group


Event closes


Samantha Caporal Del Barrio - Industrial Post-Doc, Aalborg University

Mir Ghoraishi - Wireless Technology Consultant, Gigasys Solutions

Leo Laughlin - Co-Founder, Forefront RF Ltd

Leo’s award-winning research on signal cancellation technology forms the basis of Forefront RF’s product development. He was previously a Research Fellow at the University of Bristol, and has worked in the wireless industry on mobile chipset development. He has a Ph.D in wireless communication, has published in top academic and industry journals, and is named inventor on several patents.

David Lister - Research Manager, Vodafone

SIG Champions

Mark Beach - Professor of Radio Systems Engineering, University of Bristol (Communication Systems & Networks Research Group)

Mark Beach received his PhD for research addressing the application of Smart Antenna techniques to GPS from the University of Bristol in 1989, where he subsequently joined as a member of academic staff. He was promoted to Senior Lecturer in 1996, Reader in 1998 and Professor in 2003. He was Head of the Department of Electrical & Electronic Engineering from 2006 to 2010, then spearheaded Bristol’s hosting of the EPSRC Centre for Doctoral Training (CDT) in Communications. He is the Co-Director of this centre. He leads research in the field of enabling technologies for the delivery of 5G and beyond wireless connectivity; which includes the recent award of an EPSRC Prosperity Partnership in the field of Secure Wireless Agile Networks (SWAN). Mark’s current research activities are delivered through the Communication Systems and Networks Group, forming a key component within Bristol’s Smart Internet Lab. He has over 30 years of physical layer wireless research embracing the application of Spread Spectrum technology for cellular systems, adaptive or smart antenna for capacity and range extension in wireless networks, MIMO aided connectivity for through-put enhancement, experimental evaluation and optimization of Massive MIMO, Millimetre Wave technologies as well as flexible RF technologies for SDR modems. With a strong industrially focused research portfolio, he is also the School Research Impact Director.

Brian Collins - Managing Consultant, BSC Associates

Brian has designed antennas for applications including radio and TV broadcasting, base stations, handsets and consumer products, and has operated his own consultancy firm for the last 12 years. He has published more than 70 papers on antenna topics and contributed chapters to several recent textbooks. He operates a small consultancy company, chairs the Antenna Interface Standards Group and is an Honorary Visiting Professor in the School of Electronic Engineering and Computer Science at Queen Mary, University of London.

Paul Harris - Principal Wireless Architect, VIAVI Solutions

Paul is a wireless technology expert with experience across a range of areas including research, design, implementation and standardisation. He received his PhD from the University of Bristol for evaluating the performance of massive MIMO technology in the lead-up to 5G and is currently a Principal Wireless Architect within the CTO Office at VIAVI Solutions providing thought leadership on new and emerging technologies for 5G, 6G and beyond. In line with this he represents VIAVI within a range of bodies and fora including 3GPP, the O-RAN Alliance, ETSI, the Next G Alliance, the 6G-IA and the UKTIN. His experience prior to joining VIAVI includes representing Vodafone within 3GPP for radio performance aspects, contributing to the development of massive MIMO channel estimation solutions at Cohere Technologies, and working with customers as a domain expert at National Instruments to establish effective research solutions using software-defined radio. He is also a Chartered Engineer, Senior Member of the IEEE, Fellow of the ITP, and an Honorary Industrial Fellow at the University of Bristol.

Peter Kibutu - 5G NTN Market lead, TTP plc

Peter has been working in the cellular industry for over 15 years, specialising in modem system architecture and physical layer development. Before joining TTP, Peter worked in the development of 2G/3G/4G wireless modem products and small-cell base station projects for a number of leading cellular equipment vendors. At TTP Peter has worked with a wide range of clients in the satellite and cellular communication domains, specialising in end-to-end system engineering, modem system development and advising on commercial aspects. Currently Peter is the TTP technical lead for 5G/6G activities and represents the company in range of industry bodies including 3GPP and UKTIN.

Peter Topham - Principal Engineer, Qualcomm Technologies International

Peter has more than 30 years experience of RF and high-speed circuit design, taking chips into production ranging from FM Band II through cellular, Bluetooth and on to UWB at 10GHz. He has been with Qualcomm for 7 years, specialising in low-power RF design for portable and wearable products.

Event Location

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Location info

School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS

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