Multi–band, full-duplex LTE world phone becomes a reality

University of Bristol set to demonstrate prototype for single antenna full–duplex radio that could double capacity of wireless systems at Cambridge Wireless (CW) Radio SIG meeting

The notion of a transceiver that can transmit and receive at the same time and in the same frequency band has long been considered a pipe dream. Severe levels of self-interference during transmission make the signal-to-noise ratio too low for reliable full duplex communications. But a CW event taking place on Wednesday 8 July in the University of Bristol’s School of Chemistrywill showcase recent advances in analogue and digital signal processing that make cancelling this self-interference an achievable reality. It is a breakthrough that has important ramifications for spectral efficiency by potentially doubling the capacity of wireless systems and could allow unrestricted international roaming in LTE phones, as well as being the preferred choice for operators when upgrading to 5G networks.

When it comes to duplexing for devices such as smartphones and tablets, self-interference cancelling technology needs to meet the rigorous low cost requirements of handset applications. Leo Laughlin, PhD student at the University of Bristol’s EPSRC Centre for Doctoral Training (CDT) in Communications and opening speaker at the event, will present a prototype of the full duplex transceiver with electrical balance duplexing that allows transmission and reception from a single antenna. The architecture was designed and built by Laughlin along with MSc student Chunqing Zhang, supervisors Professor Mark Beach and Dr Kevin Morris from the University’s Communication Systems and Networks research group, and CW Radio SIG Champion, Professor John Haine of u-blox AG. The team’s research has been published in this month’s edition of the IEEE Communications Magazine.

During this latest meeting of the CW Radio Special Interest Group, talks will also be heard from Ben Allen, Visiting Fellow, Department of Engineering Science, University of Oxford; Dr Mir Ghoraishi, Project Leader 5G Testbed and Proof-of-Concept, Institute for Communication Systems (ICS), University of Surrey; Samantha Caporal Del Barrio, Industrial Post-Doc, Aalborg University and WiSpry; David Lister, Research Manager at Vodafone UK and Geoff Carey, Director at MIMOtech.

For more information on this event sponsored by Rohde & Schwarzplease visit -

About Cambridge Wireless (CW): CW is the leading international community for companies involved in the research, development and application of wireless & mobile, internet, semiconductor and software technologies. With 400 members from major network operators and device manufacturers to innovative start-ups and universities, CW stimulates debate and collaboration, harnesses and shares knowledge, and helps to build connections between academia and industry. CW's 19 Special Interest Groups (SIGs) provide its members with a dynamic forum where they can network with their peers, track the latest technology trends and business developments and position their organisations in key market sectors.


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