Seminar: 'Power Amplifier Design for Wireless Communications, Beamforming at Millimetre Wave and Machine Learning for Non Orthogonal Multiple Access (NOMA)' & 'High Capacity Quantum Coexistence for Future Secure Applications'

28 July 2020, 11.00 AM - 28 July 2020, 12.00 PM

Dr Manish Nair & Dr Emilio Hugues Salas


Speaker 1: Dr Manish Nair

Title: Power Amplifier Design for Wireless Communications, Beamforming at Millimetre Wave and Machine Learning for Non Orthogonal Multiple Access (NOMA)


Wireless communication standards such as WCDMA and GSM require power amplifiers that wideband, efficient and highly linear. A high linearity Doherty power amplifier for WCDMA and wideband power amplifier for GSM is presented. These design principles are applicable in LTE and 5G. Switched-beam systems offer a promising solution for realising multi-user communications at millimetre wave (mmWave).  Maximum achievable sum data-rates achievable in switched-beam mmWave systems are presented and compared with a practical mmWave lens antenna system. Lastly, the concept of non-orthogonal multiple access (NOMA) is introduced and machine learning approaches for beam-allocation and user selection are discussed.


I am a Senior Research Associate RF Transceiver Architect for the SWAN (Secure Wireless Agile Networks) EPSRC Project.

I completed my Ph.D., which was fully funded through the RAPID 5G EU H2020-Japan Consortium as well as Richard Collier Scholarhip Programme, from the University of Kent in 2019. My research focus was on (i) 5G Massive MIMO, and (ii) millimetre wave (mmWave) hybrid beamforming. It also included experiments on multi-user mmWave radio-over-fiber (RoF) systems for implementing spatial multiplexing and mmWave sub-carrier multiple access [SCMA], and, experiments with mmWave lens antenna systems. I continued as a Research Associate which was partly funded by the 5G DRIVE EU H2020 Consortium, where my research was on (i) non-orthogonal multiple access (NOMA), (ii) advanced antenna systems (AAS) for sub-6GHz massive MIMO, and (iii) vehicle-to-infrastructure (V2I) and vehicle-to-vehicle (V2V) communications.

Before I joined the Academia, I spent a few years in the industry, where I was associated with Nokia Siemens Networks (R&D Engineering Intern during the Summers of 2009 and 2010), Skyworks Solutions Inc. (RF Design Engineer 2 from 2011 until 2013), Samsung Telecommunications America (RF Systems Design Engineer from April 2013 until December 2019), and Qualcomm Technologies India (September 2013 – December 2013), where I mainly worked on (i) R&D of GaAs HBT and LDMOS power amplifiers (waveform shaping, envelope tracking, bias, match and filter design) in quad-band GSM and band-1 WCDMA respectively, (ii) the design of absorptive and tunable filters for LTE-A (carrier aggregation) specifications, and (iii) PA and RF hardware applications.

I completed my MS in Electrical Engineering form the University of Texas at Dallas in 2010 and the Bachelor of Engineering (BE) from VTU, India in 2007.

At heart, I am still a power amplifier design engineer. My other interests are in (i) RFIC (radio frequency integrated circuits) design, (ii) filter design, (iii) microwave design, (iv) RF-MEMS (micro-electro-mechanical systems), and (v) antenna design.

Google Scholar Page: Xplore  

Page: Public  


Speaker 2: Dr Emilio Hugues Salas 

Title: High Capacity Coexistence of Quantum and Carrier-Grade Channels for Future Secure Applications


Quantum key distribution (QKD) is becoming a widely used method for encryption with a variety of applications in today’s telecommunications networks. To become practical, QKD requires to be compatible with optical network infrastructures and several challenges need to be addressed for its suitable implementation. In this Smart Internet Lab seminar talk, I will focus on describing these challenges and present our work of the record-high coexistence of 11.25 terabit per second of standard channels with DV-QKD over a multicore fibre.


Emilio Hugues-Salas received his M.Sc. and Ph.D. degrees from University of Essex, UK. During his Ph.D. research, he was involved in the European-funded projects MUSE and TRIUMPH. He joined the Optical Communications Research Group at Bangor University, UK, where he contributed to the European-funded ALPHA and OCEAN projects. He is a currently a Research Fellow in the High Performance Networks Group at the University of Bristol where he is Co-I of the UNIQORN and Quantum Communications Hub projects. His research interests include the development of flexible, multi-dimensional and multi-domain photonic systems for access, metro and core networks as well as Data Centre and 5G applications secured by Quantum Key Distribution (QKD). This QKD networking research area includes the coexistence of Quantum and Classical channels, the monitoring and physical-layer attack mitigation, the design of multidimensional quantum-ROADMs and Whiteboxes, field-trials of QKD Entanglement networks and hybrid secure end-to-end networks including post-quantum cryptography (PQC) and QKD systems.

Contact information

Please contact Harriet Parks - for more information about this seminar. 

Dr Manish Nair

Dr Emilio Hugues Salas

Edit this page