K. J. Ray Liu

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Professor K. J. Ray Liu

K. J. Ray Liu (Chinese: 劉國瑞; born 1961, Taiwan) is an American scientist/engineer, educator, and entrepreneur. He is the founder and CEO of Origin Wireless, Inc., which pioneers AI analytics for wireless sensing and indoor tracking.[1]

He serves as the 2022 Institute of Electrical and Electronics Engineers (IEEE) President and CEO (2021 President-elect; 2023 Past President) with "Make IEEE Your Professional Home" as a motto for his IEEE Presidency.[2]

He was a Distinguished University Professor, Distinguished Scholar-Teacher, and Christine Kim Eminent Professor of Information Technology at the University of Maryland, College Park, from where he retired in 2021 after over three decades of career in education. His research contributions encompass broad aspects of information and communications technology, with over 800 refereed papers, 70 patents, and 10 books.

He was also the founder and president of Odyssey Technology in 1997-1999, which developed the world's first digital surveillance system through the Internet.[3]

Early life

Liu grew up in Taichung, Taiwan, where he attended St. Viator Catholic Junior High School [4] and Taichung First Senior High School. He then went on to National Taiwan University, graduating in 1983 with a bachelor's degree in electrical engineering.[5] After serving two years in mandatory military services, Liu earned a master's degree from the University of Michigan, Ann Arbor, in 1987,[6] before receiving Ph.D. degree at the University of California, Los Angeles in 1990.[7]

Career

Liu joined University of Maryland, College Park, in 1990,[3] where he was a Distinguished University Professor[8] and a Distinguished Scholar-Teacher[9] and also Christine Kim Eminent Professor of Information Technology[10] at Electrical and Computer Engineering Department of A. James Clark School of Engineering.[3] He has trained over 70 Ph.D. and postdoctoral students,[11] of which 10 are now IEEE fellows.[3] He retired from the University of Maryland at the end of 2021.

Liu is the founder and President of Origin Wireless,[1] which he founded in 2013. His inventions won three prestigious CES Innovation Awards, including CES Best of Innovation in 2021,[12][13] 2017 CEATEC Grand Prix,[14] 2021 Red Dot Design Award,[15] and many other awards. Origin's first product, marketed as the Belkin Linksys Aware, was deployed in 2019 to over 150 countries worldwide as the first-ever Mesh Wi-Fi integrated communications and motion-sensing technology, marking the birth of integrated communications and sensing for mass consumer applications, and it won many prestigious awards.[1][16]

Liu is the 2022 IEEE President and CEO.[17] He strives to "Make IEEE Your Professional Home", a motto that defines his IEEE Presidency. He has served as the 2019 IEEE Vice President - Technical Activities,[18] Division IX Director of IEEE Board of Directors in 2016-17,[19] and the President of IEEE Signal Processing Society in 2012-13.[20] He was also the Editor-in-Chief of IEEE Signal Processing Magazine in 2003-05.[21] Liu was a founder of Asia-Pacific Association of Signal and Information Processing (APSIPA).[22][3]

As the founder and president of Odyssey Technology in 1997-1999, Liu and his team developed the world's first digital surveillance system through the Internet when the only available surveillance systems were analog.[23][3] His vision brought the digital revolution into the surveillance industry, leading to where we are today. Its product, "Remoteeyes", was the world's first digital video surveillance system to monitor and secure home/office through the Internet remotely. The system was immediately adopted worldwide and used by many major chain stores/banks. The impact is everlasting with the ubiquitous use of cameras for surveillance over the Internet nowadays.[24][16]

Awards and Honors

Liu is the recipient of two IEEE Technical Field Awards:[25] the 2021 IEEE Fourier Award for Signal Processing[26] with the citation "For outstanding leadership in and pioneering contributions to signal processing for wireless sensing and communications", and the 2016 IEEE Leon K. Kirchmayer Graduate Teaching Award[27] "for exemplary teaching and curriculum development, inspirational mentoring of graduate students, and broad educational impact in signal processing and communications".[3]

Recognized by Web of Science as a Highly Cited Researcher (2001-2014, 2016-17),[28] Liu is a fellow of the IEEE,[29] American Association for the Advancement of Science,[30] and National Academy of Inventors.[31] He was honored as 2021 Distinguished Alumni of National Taiwan University.[32] His research was featured as one of seven technologies that IEEE believes will have the world changing implications on the way humans interact with machines, the world and each other, in honor of IEEE's 125th Anniversary.[33][3]

He is also the recipient of numerous honors and awards including, IEEE Signal Processing Society 2014 Norbert Wiener Society Award[34] for "influential technical contributions and profound leadership impact" (the highest award bestowed by SPS);[35] IEEE Signal Processing Society 2009 Claude Shannon-Harry Nyquist Technical Achievement Award "for pioneering and outstanding contributions for the advances of signal processing in multimedia forensics, security, and wireless communications";[36] APSIPA 2018 Grand Award; 1994 National Science Foundation Young Investigator Award; IEEE Signal Processing Society Distinguished Lecturer; IEEE Signal Processing Society Meritorious Service Award; EURASIP Meritorious Service Award,[37][3] and over a dozen of best paper/invention awards. He was inducted into the IEEE Technical Activities Board Hall of Honors in 2021 "for starting the financial transparency movement, initializing and realizing of IEEE DataPort and IEEE App".[38]

He also received various research and teaching recognitions from the University of Maryland, including Poole and Kent Senior Faculty Teaching Award (2005), Outstanding Faculty Research Award (2008), and Outstanding Service Award (2012), all from A. James Clark School of Engineering; Invention of the Year Award (three times) from the University's Office of Technology Commercialization, as well as the George Corcoran Award for outstanding contributions to electrical engineering education from the Electrical and Computer Engineering Department, and the Outstanding Systems Engineering Faculty Award in recognition of outstanding contributions in interdisciplinary research from Institute for Systems Research.[3]

Contributions and Impact

Liu's research contributions encompass broad aspects of signal processing and communications, including wireless communications; coding; networking; game theory; multimedia signal processing; information forensics; network security; and signal processing algorithms and architectures. In the recent decade, his focus has been developing AI analytics for wireless sensing and indoor tracking using ambient radio signals.[3]

His fundamental discovery of accurate and robust speed estimation under severe multipath and non-line-of-sight conditions using ambient radio waves was credited as a groundbreaking breakthrough in the nearly two-century-long quest for some new physics that could rival the Doppler Effect,[39][40][24] which works well only under line-of-sight conditions. He showed that when there is a large enough number of multipath signals (such as indoor environments), the time-reversal focusing ball exhibits a stationary behavior in its energy distribution. Specifically, in the limit of large time-resolved multipath signals, the time-reversal spot has a spatially independent structure that follows a Bessel function power distribution. This means that the time-reversal spot structure is inherently location and environment-independent. Thus, the distance an object has moved, as well as its speed, can be determined. This is an unprecedented discovery in that one can now accurately/reliably estimate/detect the speed of a moving object indoors; the more multipaths, the better the performance, contrary to prior beliefs.[24]

Building on that foundation for accurate/reliable wireless sensing using ambient radio waves, Liu and his team at Origin developed an AI platform including many analytic engines with endless applications such as indoor tracking; gait determination; motion detection for security; sleep monitoring; monitoring small motions inside a car; material sensing; monitoring heart rate and breathing; heart rate variability detection; fall detection; recognizing and counting people in hidden spaces; millimeter-wave imaging; millimeter-wave real-time handwriting tracking and analysis; millimeter-wave keyboard tracking; and sound detection.[24][41]

Liu trailblazed the frontier of wireless sensing that makes sense of ambient Wi-Fi radio waves as the new sixth sense to decipher the world around us! The term "wireless" is no longer restricted to communications. Now and in the future, it is a sensing solution that will forever change Wi-Fi as we know it today, as well as future 5G/6G systems. Through his entrepreneurial endeavor, a new industry is emerging. In essence, one can now make sense of and monetize Channel State Information (sort of the Fourier transform of Channel Impulse Response), an unthinkable concept before. From now on, wireless sensing is becoming an integrated part of the technology infrastructure, especially for 5G/6G when bandwidth is large enough to harness more multipaths and most IoT devices are connected to deliver smart home/office/city.[24] He was the first who proposed in 2019 the establishment of an international standard on wireless sensing to the Chair of the IEEE 802 Standard Committee, who facilitated the creation of 802.11bf WLAN Sensing as the world's first wireless sensing standard.[1]

Liu also pioneered cross-layer design using antenna arrays for wireless communications in 1997 by first introducing the seminal concept of duality between uplink and downlink for joint transmit beamforming and power control to increase the number of users in a cellular network by 100x.[42][43] It inspired decades of research and standard development in cross-layer optimization of MIMO wireless networks, dramatically impacting most wireless communications system designs.[24]

In addition, he was among the earliest to recognize and significantly impact cooperative communications beyond physical-layer. He showed the endless possibilities of cooperation in a series of seminal works to establish cooperation as a communication paradigm that can improve communication performance, expand transmission coverage area; improve energy efficiency and extend network lifetime; and increase throughput and stability region for multiple access schemes.[44][24]

Liu was among the first to employ game theory to devise optimal solutions and strategies in cognitive radio for dynamic spectrum access, allocation, sharing, sensing, security, and anti-jamming.[45][24] His pioneering works created the game-theoretic foundation for cognitive networking by developing new framework of joint learning and decision making such as Chinese Restaurant Games.[46] It enabled true cognitive intelligence and adaptation with user interactions, making the dream of cognitive networking possible.

He was also one of the earliest pioneers in multimedia forensics and security. In his 2005 book, "multimedia fingerprinting forensics for traitor tracing",[47] the first of its kind, he has set the foundation and offered new directions for this emerging field. He coined the name “information forensics” when proposing and developing the journal IEEE Transactions on Information Forensics and Security.[3][24]

Liu was the prime architect and proposer of IEEE Trans. on Information Forensics and Security, IEEE Journal on Selected Topics of Signal Processing, and IEEE Trans. on Multimedia. He also initiated the creation of IEEE Trans. on Computational Imaging and IEEE Trans. on Signal and Information Processing over Networks. As Vice President – Publications, he started the Inside Signal Processing eNewsletter for IEEE Signal Processing Society.[3]

As a leader in IEEE, Liu was credited for starting the financial transparency movement, leading to the next-generation financial system at IEEE. He proposed and created the IEEE DataPort to offer data repository services to support open science and reproducible research by hosting data that are citable and useful for our community. He also proposed and co-led the development of the IEEE App that serves as "Your Global Gateway to IEEE" to discover IEEE and network globally.[3][38]

Publications and Patents

Liu has published over 800 refereed papers, 70 patents, and 10 books, including the following:[48]

  • "Reciprocity, Evolution, and Decision Games in Network and Data Science", Cambridge University Press, 2021[46]
  • "Wireless AI: Wireless Sensing, Positioning, IoT, and Communications", Cambridge University Press, 2019[41]
  • "Behavior Dynamics in Media-Sharing Social Networks", Cambridge University Press, 2011[49]
  • "Cognitive Radio Networking and Security – A Game Theoretic View", Cambridge University Press, 2010[45]
  • "Cooperative Communications and Networking", Cambridge University Press, 2009[44]
  • "Resource Allocation for Wireless Networks: Basics, Techniques, and Applications", Cambridge University Press, 2008[50]
  • "Ultra-Wideband Communication Systems: The Multiband OFDM Approach", Wiley, 2007[51]
  • "Network-Aware Security for Group Communications", Springer, 2007[52]
  • "Multimedia Fingerprinting Forensics for Traitor Tracing", Hindawi, 2005[47]
  • "Design of Digital Video Coding Systems: A Complete Compressed Domain Approach", Marcel Dekker, 2001[53]
  • "Handbook on Array Processing and Sensor Networks", Ed., IEEE-Wiley, 2009[54]

References

  1. ^ a b c d "Origin Wireless, Inc". Retrieved 9 July 2022.
  2. ^ "K. J. Ray Liu is 2021 IEEE President-Elect". IEEE Spectrum. 14 October 2020. Retrieved 7 November 2020.
  3. ^ a b c d e f g h i j k l m n "Professor K. J. Ray Liu". University of Maryland. Retrieved 7 November 2020. CC BY-SA icon.svg Text was copied from this source, which is available under a Creative Commons Attribution-ShareAlike 3.0 Unported license and the GNU Free Documentation License.
  4. ^ "St. Viator Catholic Junior High School in Taiwan". Retrieved 7 November 2020.
  5. ^ "NTU Alumnus and Distinguished Chair Professor K. J. Ray Liu elected as 2021 IEEE President-Elect". 14 October 2020. Retrieved 7 November 2020.
  6. ^ "Alumni in Academia". University of Michigan Department of Electrical and Computer Engineering. Retrieved 15 October 2020.
  7. ^ "Dr. K. J. Ray Liu". Mathematics Genealogy Project. Retrieved 10 October 2022.
  8. ^ "Distinguished University Professor". University of Maryland. Retrieved 7 November 2020.
  9. ^ "Distinguished Scholar-Teacher". University of Maryland. Retrieved 7 November 2020.
  10. ^ "Christine Kim Eminent Professor of Information Technology". University of Maryland. Retrieved 7 November 2020.
  11. ^ "Students of K. J. Ray Liu". Retrieved 7 November 2020.
  12. ^ "Origin Wireless News". Retrieved 17 December 2020.
  13. ^ "2021 CES Best of Innovation". Retrieved 17 December 2020.
  14. ^ "2017 CEATEC Grand Prix award". Retrieved 7 November 2020.
  15. ^ "2021 Red Dot Design Award". Retrieved 10 July 2022.
  16. ^ a b "Keynote by IEEE President K. J. Ray Liu at SPS Entrepreneurship Forum at ICASSP, 2022". Retrieved 25 September 2022.
  17. ^ "K. J. Ray Liu is 2021 IEEE President-Elect". IEEE Spectrum. 14 October 2020. Retrieved 7 November 2020.
  18. ^ "K. J. Ray Liu Elected 2019 IEEE Vice President, Technical Activities". Retrieved 7 November 2020.
  19. ^ "K. J. Ray Liu Elected to IEEE Board of Directors". Retrieved 7 November 2020.
  20. ^ "K. J. Ray Liu Elected President-Elect of IEEE Signal Processing Society". Retrieved 7 November 2020.
  21. ^ "K. J. Ray Liu served as the Editor-in-Chief of IEEE Signal Processing Magazine" (PDF). Retrieved 7 November 2020.
  22. ^ "K. J. Ray Liu was a founder of APSIPA". Retrieved 7 November 2020.
  23. ^ "Remote Eyes". Retrieved 7 November 2020.
  24. ^ a b c d e f g h i "IEEE President K. J. Ray Liu, "Follow Multiple Paths," Changing the World With Microwave Time Reversal Focusing, IEEE Journal of Microwaves, 2022". Retrieved 25 September 2022.
  25. ^ "IEEE Technical Field Awards". Retrieved 7 November 2020.
  26. ^ "IEEE IEEE Fourier Award for Signal Processing". Retrieved 7 November 2020.
  27. ^ "IEEE Leon K. Kirchmayer Graduate Teaching Award". Retrieved 7 November 2020.
  28. ^ "Highly Cited Researcher". Retrieved 7 November 2020.
  29. ^ "IEEE Fellow Directoy". Retrieved 7 November 2020.
  30. ^ "AAAS Fellow Directoy". Retrieved 7 November 2020.
  31. ^ "NAI Fellow Directory". Retrieved 7 November 2020.
  32. ^ "2021 Distinguished Alumni of National Taiwan University". Retrieved 10 July 2022.
  33. ^ "IEEE's 125th Anniversary". Retrieved 7 November 2020.
  34. ^ "IEEE Signal Processing Society 2014 Society Award". Retrieved 7 November 2020.
  35. ^ "IEEE Signal Processing Society". Retrieved 7 November 2020.
  36. ^ "IEEE Signal Processing Society 2009 Technical Achievement Award". Retrieved 7 November 2020.
  37. ^ "K. J. Ray Liu's Honors and Awards". Retrieved 7 November 2020.
  38. ^ a b "IEEE Technical Activities Board Hall of Honors" (PDF). Retrieved 10 July 2022.
  39. ^ ""WiBall: A Time-Reversal Focusing Ball Method for Decimeter-Accuracy Indoor Tracking", IEEE Internet of Things Journal, 2018". arXiv:1712.06562. doi:10.1109/JIOT.2018.2854825. S2CID 53435935. Retrieved 9 July 2022. {{cite journal}}: Cite journal requires |journal= (help)
  40. ^ ""WiSpeed: A Statistical Electromagnetic Approach for Device-Free Indoor Speed Estimation," IEEE Internet of Things Journal, 2018". arXiv:1712.00348. doi:10.1109/JIOT.2018.2826227. S2CID 49187664. Retrieved 9 July 2022. {{cite journal}}: Cite journal requires |journal= (help)
  41. ^ a b ""Wireless AI: Wireless Sensing, Positioning, IoT, and Communications", Cambridge University Press, 2019". Retrieved 17 December 2020.
  42. ^ ""Joint optimal power control and beamforming in wireless networks using antenna arrays", IEEE Transactions on Communications, 1998". doi:10.1109/26.725309. hdl:1903/5929. Retrieved 9 July 2022. {{cite journal}}: Cite journal requires |journal= (help)
  43. ^ ""Transmit beamforming and power control for cellular wireless systems", IEEE Journal on Selected Areas in Communications, IEEE Transactions on Communications, 1998". doi:10.1109/49.730452. Retrieved 9 July 2022. {{cite journal}}: Cite journal requires |journal= (help)
  44. ^ a b ""Cooperative Communications and Networking", Cambridge University Press, 2009". Retrieved 17 December 2020.
  45. ^ a b Ray Liu, K. J.; Wang, Beibei (28 October 2010). "Cognitive Radio Networking and Security: A Game Theoretical View", Cambridge University Press, 2010. ISBN 978-0521762311.
  46. ^ a b Chen, Yan; Wang, Chih-Yu; Jiang, Chunxiao; Ray Liu, K. J. (22 July 2021). "Reciprocity, Evolution, and Decision Games in Network and Data Science", Cambridge University Press, 2021. ISBN 978-1108494748.
  47. ^ a b ""Multimedia Fingerprinting Forensics for Traitor Tracing", Hindawi, 2005" (PDF). Retrieved 17 December 2020.
  48. ^ "Publications". Retrieved 24 July 2021.
  49. ^ ""Behavior Dynamics in Media-Sharing Social Networks", Cambridge University Press, 2011". Retrieved 17 December 2020.
  50. ^ ""Resource Allocation for Wireless Networks: Basics, Techniques, and Applications", Cambridge University Press, 2008". Retrieved 17 December 2020.
  51. ^ ""Ultra-Wideband Communication Systems: The Multiband OFDM Approach", Wiley, 2007". Retrieved 17 December 2020.
  52. ^ ""Network-Aware Security for Group Communications", Springer, 2007". Retrieved 17 December 2020.
  53. ^ ""Design of Digital Video Coding Systems: A Complete Compressed Domain Approach", Marcel Dekker, 2001". Amazon. Retrieved 17 December 2020.
  54. ^ ""Handbook on Array Processing and Sensor Networks", Ed., IEEE-Wiley, 2009". Retrieved 17 December 2020.
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