Transmitter Design for Next Generation Wireless Communication Systems

Lecturer: 
Professor Christian Fager
Lecturer's institute: 
Chalmers University of Technology, Sweden
Date: 
7.11.2018 08:30 to 8.11.2018 12:30

 

Place: VTT auditorium, Kaitoväylä 1 (Note the location! Remember to take your ID card/passport with you to prove your identity!)

Time: 7.11 8:30 am-12:30 pm

             8.11 8:30 am-12:30 pm

Abstract

The objective of this intensive two-day (8h lecture) course is to give an overview to recent advances in the area of efficient and linear transmitters for wireless communication applications. Theoretical concepts will be illustrated with practical results obtained from our research at Chalmers.

Lecture 1: Efficient and wideband power amplifiers
The first lecture will address the design of power amplifers, which is one of the most critical components in wireless communication transmitters. Special focus will be on advanced Doherty PA design techniques, by which both high efficiency, good linearity, and large bandwidth can be obtained.

Lecture 2: Wideband nonlinear characterization techniques
The second lecture will review various nonlinear characterization techniques and how they can be used to gain insights about the detailed operation and performance of power amplifiers and transmitters under realistic operating conditions, both .

Lecture 3: Nonlinear effects in active antenna transmitters
The trend towards massive MIMO and phased arrays in 5G make it necessary to understand and predict the operation of power amplifiers in the context of active antenna arrays – from the baseband input to the radiated field characteristics. This lecture will introduce new system analysis techniques, by which we will predict the influence of nonlinear and thermal effects in this context.

Lecture 4: Linearization
The final lecture will concentrate on digital pre-distortion linearization techniques for power amplifiers and transmitters. Focus will be on advanced linearization techniques that will address the needs in future multi-antenna systems.

 

Biography

Christian Fager (IEEE Senior Member) received his Ph.D. degree from Chalmers University of Technology, Sweden, in 2003. Since 2015, he is a Professor at the Microwave Electronics Laboratory at the same university where he also is Vice Director of the GHz Centre for industrial collaborations. During the summer of 2014, he was a Visiting Scholar at University of California, San Diego. His research is mainly in the area of energy efficient and linear transmitters for future wireless communication and sensor systems. His research includes nonlinear transistor modeling, efficient power amplifier architectures, nonlinear distortion analysis and behavioral modeling, digital pre-distortion linearization, nonlinear and wideband measurement techniques. He is co-inventor of 5 patents/patent applications and published more than 130 papers in refereed international journals and conferences. He also co-authored the book: Nonlinear Transistor Model Parameter Extraction Techniques (Cambridge University Press, 2011). He serves as a TPC member of the IEEE IMS and INMMiC conferences, and as a member of the MTT-20 (Wireless Communications) MTT-S technical committee.

Dr. Fager is currently an Associate Editor of IEEE Microwave Magazine.

Last updated: 6.11.2018