Professor Chao-Kai Wen
Institute of Communications Engineering, Department of Electrical Engineering (joint appointment), Department of Applied Mathematics (joint appointment)
National Sun Yat-sen University, Kaohsiung, Taiwan 804, R.O.C Email: chaokai.wen@mail Please append ".nsysu.edu.tw" to the end of the email.
Hello, there! I am the Professor of Institute of Communications Engineering at National Sun Yat-sen University (NSYSU). I received my PhD from the Institute of Communications Engineering, National Tsing Hua University, Taiwan, in 2004. I joined NSYSU after spending 5 years in industry (Industrial Technology Research Institute, Taiwan and MediaTek Inc., Taiwan). In the five years of industry, I focused on broadband digital transceiver design.
My research style is interdisciplinary and usually combines communication technology, signal processing, data analysis, and prototyping. I am very interested in realizing the results of the research on communication prototypes and test platforms, and most of the technology have been transferred to industry. I have won several awards for Industry-University Cooperation from NSYSU. My papers were selected as the best paper awards by IEEE GLOBECOM 2016 and WCSP 2019.
I am Editor for the IEEE Transactions on Wireless Communications, IEEE Communications Letters, and IEEE Wireless Communications Letters. I received 2018 IEEE COMML Editor Award. My current research interests center around:
Massive MIMO & Terminal devise MIMO testbed
Deep learning for wireless physical layer (Overview in IEEE Wireless Communications)
Compressed sensing
Smart grid
Secrecy
News
2 September, 2020
12x12 MIMO-OFDM OTA Demo at Taipei Nangang Exhibition Center for MOST B5G/6G Wireless Network Research Project
12x12 MIMO-OFDM based on 5G NR frame structure (Rel. 15)
12- Rx antennas in a compact smartphone for the 3.5 GHz
12-Tx spatial streams over 2 distributed BSs
100 MHz channel width
64-QAM
Achieving 42.9 bps/Hz spectral efficiency on a 5.5 inch screens compact smartphone by using
1) Precoding over two distributed BSs,
2) Smart channel estimator with environment sensing,
3) AI-aided MIMO detector,
4) Joint MIMO detector and LDPC decoder (JDD)
14-17 January, 2020
mmWave Fast Antenna and Beam Switching OTA Demo at 2020 Taiwan Telecommunications Annual Symposium
mmWave smartphone with two subarrays for the 28 GHz
NR Frame Structure (Release 15)
100 MHz channel width
From QPSK to 256-QAM
Fast antenna and beam switching (Fast-ABS) mechanism
Efficient and seamless connectivity under hand blockage
24-26 January, 2019
mmWave Beam Tracking OTA Demo at 2019 Taiwan Telecommunications Annual Meeting
mmWave antenna system in a smartphone for the 28 GHz
NR Frame Structure (Release 15)
100 MHz channel width
256-QAM and 1204-QAM
Fast beam tracking mechanism
Support various performance measurement (e.g., EVM, SNR, throughput, beam pattern )
3 August, 2018
20x16 (or 16x16) MIMO OTA Demo
20 (or 16)-antenna array in the compact smartphone for the 3.5 GHz
16 spatial streams
100 MHz channel width
256-QAM for 20-antennas (or 64QAM for 16-antennas)
62.4 bps/Hz (or 49.7 bps/Hz) spectral efficiency on a compact smartphone with 5.5 inch screens
12 December, 2017
20x14 MIMO OTA Demo at 2017 Industry Outlook Technology Forum
20-antenna array in the compact smartphone for the 3.5 GHz
14 spatial streams
100 MHz channel width
256-QAM
59.5 bps/Hz spectral efficiency on a compact smartphone with 5.5 inch screens
11 August, 2017
16x12 MIMO OTA Demo at 2017 IAET Summer Seminar
16-antenna array in the compact smartphone for the 3.5 GHz
12 spatial streams
100 MHz channel width
256-QAM
53.41 bps/Hz spectral efficiency