Title: Exposure-Aware Beamforming and Adaptive HARQ for Millimeter-Wave Networks
Date: 8-ene-20
Location: 301 del aulario III
Speaker: Borja Peleato (Purdue Univ.)
Abstract:
The scarcity of the wireless spectrum is a looming threat to future communications. The number of wireless devices is increasing exponentially and expected to continue doing so in the near future, while users and applications demand more data at faster speeds, lower latencies, and higher reliability. This has motivated efforts to exploit the wide bandwidths available in the millimeter wave band.
Millimeter wave communications are expected to provide multi gigabit-per-second data rates by using antenna arrays and highly directional beamforming to overcome path losses. Many studies have proposed precoding methods tailored to millimeter wave channels, but barely any of them have considered the radiation exposure to users. The first part of this talk will introduce a simple quadratic model for exposure and then use it to derive precoding techniques aimed at maximizing SNR subject to both transmit power and exposure constraints.
Millimeter wave networks are also expected to offer extremely high reliability and low latencies. The second part of this talk will propose hybrid ARQ techniques that leverage coded transmissions and cached side information to improve latency and reliability without jeopardizing throughput. They will group codewords into bundles that can be acknowledged together and use a dynamic programming scheme to optimize the type and number of incremental redundancy bits based on the quality of the previously received symbols
Bio:
Borja Peleato is an Assistant Professor and Associate Director of Graduate Admissions in the School of Electrical and Computer Engineering at Purdue University. His current research interests include signal processing and channel coding for wireless communications and non-volatile storage, coded caching, and distributed optimization. He received his B.S. from the Universitat Politecnica de Catalunya in Barcelona, Spain, writing the final thesis as a visiting student at the Massachusetts Institute of Technology in 2006, and received his Ph.D. in Electrical Engineering from Stanford University in 2013. After his Ph.D. work, he spent one year in Proton Digital Systems as a Senior Flash Channel Architect, where he was in charge of flash memory characterization, LDPC code construction, and signal processing routines. Borja is the recipient of a "La Caixa" graduate fellowship award. He is also part of the team that ended in the 11th place in the worldwide DARPA SC2 challenge, resulting in a $1.5M award overall.