CR IEEE lunch and learn: Advanced RF Front-End and Transceiver Systems
IEEE Microwave Theory and Techniques Chapter Presents
A Lunch and Learn Distinguished Microwave Lecture (DML) on
“Advanced RF Front-End and Transceiver Systems Design Overview for Carrier Aggregation based 4G/5G Radios”
Monday, December 3, 2018, 12:00 - 2:00 pm
Speaker: Dr. Walid Ali-Ahmad, RF/Analog Systems Lead, Facebook Connectivity, Menlo Park, CA
Abstract: Over the past few years, there has been an explosion in the mobile data usage due to increasing number of tablets and smart phones. To support such demand, wider transmission bandwidths are needed, and hence, the technique of Carrier Aggregation (CA) has been introduced in 4G cellular systems. This enables scalable bandwidth expansion beyond the single LTE carrier by aggregating two or more LTE component carriers of similar or different baseband bandwidth, which can be chosen from the same (intra-band) or different (inter-band) 3GPP frequency bands. Furthermore, CA is supported by both FDD and TDD modes, and this offers the optimum flexibility in the way the spectrum is utilized and how the network scheduling is configured. In order to push towards 5G data rates (>1Gbps), leveraging more antennas and transmitting more bits per symbol to increase spectral efficiency requires the use of MIMO and higher-order modulation techniques. This presentation focuses on discussing the RF system architectural challenges for Advanced-LTE based user equipment (UE) radio, and the resultant increased complexity in the radio due to the use of CA, MIMO, and higher order modulation techniques; furthermore, concurrency and coexistence scenarios with other radio access technologies (RAT) are considered in how they further add to the complexity of the RF front-end and to its linearity requirements.
Speaker: Dr. Walid Ali-Ahmad is currently working with Facebook Connectivity team as RF/Analog System Lead, with focus on 5G, WiGig &mmW Radio Architecture & Design for Connectivity & VR Systems. From July 2014 until December 2017, he was a VP of Technology at Qualcomm, Inc, and was involved in the architecture and RF systems design of advanced RF Front-Ends and transceiver systems for 4G and sub-6GHz 5G User Equipment (UE); during his tenure at Qualcomm, he was a Visiting Professor at UCSD in the ECE department, involved in 5G research and focused on Wireless RF systems engineering. Before July 2014, he was a senior director of Technology at Mediatek, and led the architecture and RF systems design of low-cost 2G/3G/LTE integrated transceivers and SoCs for Chinese feature phones and smartphones. He was an associate professor of Electrical Engineering at American University of Beirut from 2004 to 2007, with focus on applied electromagnetics, and communication circuits and systems. From 1997 to 2004, he was a principal member of Technical staff at Maxim Integrated products, and led the systems development of the first low-cost low-power WCDMA direct-conversion SiGe BiCMOS transceiver IC. He holds several patents on RF front-end tuning, and has published many articles and given many talks on RF systems design for cellular and millimeter-wave radio systems. He is a senior IEEE member and an IEEE DML for 2017–2019. He has been in the IEEE RFIC conference technical program and steering committees since 2004; he was the general chair of RFIC2018.
Date and Time
Location
Hosts
Registration
- Date: 03 Dec 2018
- Time: 12:00 PM to 02:00 PM
- All times are (GMT-06:00) US/Central
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- Cedar Rapids Public Library
- 450 5th Ave. SE
- Cedar Rapids, Iowa
- United States
- Room Number: Beems Auditorium A
- Starts 31 October 2018 09:00 AM
- Ends 03 December 2018 10:00 AM
- All times are (GMT-06:00) US/Central
- No Admission Charge
- Menu: Optional Luch from Greyhound Cafe $10 cash/check