IEEE Global Communications Conference
9-13 December 2018 // Abu Dhabi, UAE
Gateway to a Connected World

Keynote Speaker

Title: Full-Duplex Radio Systems – Prospects and Advances in Signal Processing

Prof Mikko Valkama, TUT, Finland 

Abstract:

Simultaneous transmit-receive systems require sufficient isolation between the TX and RX chains to prevent strong transmit signal from desensitizing or blocking the receiver. In inband full-duplex where the TX and RX both operate simultaneously at the same carrier frequency, the TX-RX isolation requirements are most severe, commonly between 100-150 dB, calling for advances in antenna systems, passive isolation methods as well as active self-interference (SI) cancellation solutions at RF and DFE stages. Additonally, in frequency-division duplexing (FDD) based systems, due to the nonlinearities of the involved RF electronics, transmit signal intermodulation products may hit RX passband.  Different active cancellation solutions may thus be deployed also in FDD transceivers, to improve effective TX-RX isolation. In this talk, we discuss and review some of the recent active RF cancellation and DSP cancellation solutions, and demonstrate their performance with RF measurements in both inband full-duplex and FDD system contexts. We also discuss the TX-RX isolation requirements and SI cancellation prospects in the context of radio-based sensing in TDD radio networks, with particular emphasis on OFDM radar concept.

Prof Mikko Valkama TUT, FinlandMikko Valkama (S'00--M'01--SM '15) was born in Pirkkala, Finland, on November 27, 1975. He received the M.Sc. and Ph.D. Degrees (both with honors) in electrical engineering (EE) from Tampere University of Technology (TUT), Finland, in 2000 and 2001, respectively. In 2002, he received the Best Ph.D. Thesis -award by the Finnish Academy of Science and Letters for his dissertation entitled "Advanced I/Q signal processing for wideband receivers: Models and algorithms". In 2003, he was working as a visiting post-doc research fellow with the Communications Systems and Signal Processing Institute at SDSU, San Diego, CA. Currently, he is a Full Professor and Laboratory Head at the Laboratory of Electronics and Communications Engineering at TUT, Finland. His general research interests include radio communications, communications signal processing, estimation and detection techniques, signal processing algorithms for flexible radios, cognitive radio, full-duplex radio, radio localization, radio-based sensing and 5G mobile radio networks.

Star Diamond Patrons

Patrons

Exhibitors