John Chih-Hao Liu Email and Phone Number

•Technical lead for 5G sidelink - Lead the Rel-18 5G sidelink unlicensed standardization- Lead the SL-U waveform, physical layer procedure, channel access design and performance evaluation- Lead the 5G sidelink modem design and implementation for FR-2-x•4G/5G modem design in un-license band and standardization- Lead in physical layer and MAC layer design o System level design including frame structure, L1&L2 procedures and performance analysis o Physical waveform design for system acquisition, RACH, preamble, broadcast, control and data channels o Receiver algorithm design for modem and base station: timing/frequency acquisition, TTL, FTL, channel estimation, interference estimation, burst interference handling, preamble detection and decoding. o Shared spectrum medium access, HARQ, system attachment, CSI feedback, scheduling procedure design- Co-lead in the standardization effort in Multefire forum- Co-lead in the system design in Multefire modem trials & commercialization o Provide algorithm designs and design documents for modem and base station implementations o Communicate with firmware, software and hardware teams with design options and implementation plan o Closely work with teams for implementation, verification and testing - C++ Software development in HPC for system level performance simulation & verification•IoT system design in un-license band- Lead in system level, physical and MAC layer design- Main driver for the IoT standardization in Multefire forum•4G/5G massive MIMO communication system- Lead in UL/DL multi-user beamforming system software/hardware architecture design - Antenna self-calibration algorithm design, channel estimation algorithm design - Power amplifier pre-distortion cancellation algorithm design with machine learning algorithms

EE112: Digital Signal Processing; EE111: Signal and Systems; EE150: Applications of Convex Optimization in Signal Processing and Communications• Instructed graduate-level courses; developed patience and interpersonal communication skills.• Received excellent student feedback (4.5/5.0) as a TA through Caltech’s official survey.

• Proposed novel precoder, equalizer and algorithm designs for MIMO communication systems.• Authored 5 refereed journal papers, and 9 international conference papers.

• Lead a group of programmers. Manage and involve in the design projects of the e-Government platforms which facilitate the administrative process and provide web-based services for all coast guard units in Taiwan.

• Proposed the filterbank transceiver which can combats narrowband interference for frequency selective channels.Worked on the projects of low-power micro-controller, Viterbi decoder.• Published 1 journal paper and 2 international conference papers on these results.

• Multirate Signal Procession, Digital Communications and Linear Algebra.