Publications

Books

B1.  K. J. Ray Liu and Beibei Wang, “Wireless AI: Wireless Sensing, Positioning, IoT, and Communications,” Cambridge University Press, 2019. 

B2.  K. J. Ray Liu and Beibei Wang, “Cognitive Radio Networking and Security: A Game Theoretic View,” Cambridge University Press, 2011.

Journal Articles

1.  Jiangyi Deng, Xiaoyu Ji, Beibei Wang, Bin Wang, Wenyuan Xu, “Dr. Defender: Proactive Detection of Autopilot Drones based on CSI,” IEEE Transactions on Information Forensics and Security, to appear.

2.  Mohammed Zahid Ozturk, Chenshu Wu, Beibei Wang, Min Wu, and K. J. Ray Liu, “RadioSES: mmWave-Based Audioradio Speech Enhancement and Separation System,” IEEE/ACM Transactions on Audio Speech, and Language Processing, vol. 31, pp. 1333-1347, Mar. 2023.

3.  Guozhen Zhu, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “EZMap: Boosting Automatic Floor Plan Construction with high-Precision Robotic Tracking,” IEEE Internet of Things Journal, vol. 10, no. 8, pp. 6988-6998, Apr. 2023.

4.  Yuqian Hu, Mohammed Zahid Ozturk, Beibei Wang, Chenshu Wu, Feng Zhang, and and K. J. Ray Liu, “Robust Passive Proximity Detection using Wi-Fi,” vol. 10, no. 7, pp. 6221-6234, Apr. 2023.

5.  Sai Deepika Regani, Beibei Wang, Yuqian Hu, and K. J. Ray Liu, “GWrite: Enabling Through-the-Wall Gesture Writing Recognition Using WiFi,” IEEE Internet of Things Journal, vol. 10, no. 7, pp. 5977-5991, Nov. 2022.

6.  Muhammed Zahid Ozturk, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “RadioMic: Sound Sensing via Radio Signals,” IEEE Internet of Things Journal, vol. 10, no. 5, pp. 4431-4448, Oct. 2022.

7.  Xiaolu Zeng, Beibei Wang, Chenshu Wu, Sai Deepika Regani, and K. J. Ray Liu, “WiCPD: Wireless Child Presence Detection System for Smart Cars,” IEEE Internet of Things Journal, vol. 9, no. 24, pp. 24866-24881, Dec. 2022.

8.  Chenshu Wu, Beibei Wang, Oscar C. Au, and K. J. Ray Liu, “Wi-Fi Can Do More: Toward Ubiquitous Wireless Sensing,” IEEE Communications Standards Magazine, vol. 6, no. 2, pp. 42-49, June 2022.

9. Fengyu Wang, Xiaolu Zeng, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “Driver Vital Signs Monitoring Using Millimeter Wave Radio,” IEEE Internet of Things Journal, vol. 9, no. 13, pp. 11283-11298, July 2022.

10. Yuqian Hu, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “DeFall: Environment-Independent Passive Fall Detection Using WiFi,” IEEE Internet of Things Journal, vol. 9, no. 11, pp. 546-557, June 2022.

11. Xiaolu Zeng, Fengyu Wang, Beibei Wang, Chenshu Wu, K. J. Ray Liu, and Oscar C. Au, “In-Vehicle Sensing for Smart Cars,” IEEE Open Journal of Vehicular Technology, vol. 3, pp. 221-242, May 2022.

12. Mohammed Zahid Ozturk, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “GaitCube: Deep Data Cube Learning for Human Recognition with Millimeter-Wave Radio,” IEEE Internet of Things Journal, vol. 9, no. 1, pp. 546-557, Jan. 2022.

13. Yuqian Hu, Beibei Wang, Chenshu Wu, and K. J. Ray Liu, “mmKey: Universal Virtual Keyboard using A Single Millimeter Wave Radio,” IEEE Internet of Things Journal, vol. 9, no. 1, pp. 510-524, Jan. 2022.

14. Yusen Fan, Chenshu Wu, Feng Zhang, Beibei Wang, and K. J. Ray Liu, "RF-based Indoor Moving Direction Estimation using a Single Access Point", IEEE Internet of Things Journal, vol. 9, no. 1, pp. 462-473, Jan. 2022.

15. Fengyu Wang, Xiaolu Zeng, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, "mmHRV: Contactless Heart Rate Variability Monitoring using Millimeter-Wave Radio", IEEE Internet of Things Journal, vol. 8, no. 22, pp. 16623-16636, Nov. 2021.

16. Sai Deepika Regani, Chenshu Wu, Beibei Wang, Min Wu, and K. J. Ray Liu, "mmWrite: Passive Handwriting Tracking using a Single Millimeter Wave Radio", IEEE Internet of Things Journal, vol. 8, no. 17, pp. 13291-13305, Sep. 2021.

17. Xiaolu Zeng, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “Massive MIMO for High-Accuracy Target Localization and Tracking”, IEEE Internet of Things J., vol. 8, no. 12, pp. 10131-10145, June 2021.

18. Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “mmEye: Super-Resolution Millimeter Wave Imaging”, IEEE Internet of Things J., vol. 8, no. 8, pp. 6995-7008, Apr. 2021.

19. Fengyu Wang, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “ViMo: Multi-person Vital Sign Monitoring using Commodity Millimeter Wave Radio”, IEEE Internet of Things J., vol. 8, no. 3, pp. 1294-1307, Feb. 2021.

20. Chenshu Wu, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “mSense: Towards Mobile Material Sensing with a Single Millimeter-Wave Radio”, Proc. ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), September 2020.

21. Fengyu Wang, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “Respiration Tracking for People Counting and Recognition”, IEEE Internet of Things J., vol. 7, no. 6, pp. 5223-5245, June 2020.

22. Chenshu Wu, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “EasiTrack: Decimeter-Level Indoor Tracking with Graph-based Particle Filtering”, IEEE Internet of Things J., vol. 7, no. 3, pp. 2397-2411, Mar. 2020.

23. Sai Deepika Regani, Qinyi Xu, Beibei Wang, Min Wu, and K. J. Ray Liu, "Driver Authentication for Smart Car Using Wireless Sensing", IEEE Internet of Things J., vol. 7, no. 3, pp. 2235-2246, Mar. 2020.

24. Xiaolu Zeng, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “Radio Frequency Based Direction Sensing Using Massive MIMO”, IEEE Access, vol. 8, pp. 26827-26838, Jan 2020.

25. Feng Zhang, Chenshu Wu, Beibei Wang, Hung-Quoc Lai, and K. J. Ray Liu, "WiDetect: A Statistical Electromagnetic Framework for Robust Presence Detection", Proc. of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), vol. 3, no. 3, Article 122:1-24, Sep. 2019.

26. Feng Zhang, Chenshu Wu, Beibei Wang, Min Wu, Dan Bugos, Hangfang Zhang, and K. J. Ray Liu, "SMARS: Sleep Monitoring via Ambient Radio Signals", IEEE Trans. on Mobile Computing.

27. Qinyi Xu, Yi Han, Beibei Wang, Min Wu, and K. J. Ray Liu, “Indoor Events Monitoring using Channel State Information Time Series,” IEEE Internet of Things J., vol. 6, no. 3, pp. 4977 - 4990, June 2019.

28. Feng Zhang, Chen Chen, Beibei Wang, Yi Han, and K. J. Ray Liu, "WiBall: A Time-Reversal Focusing Ball Method for Decimeter-Accuracy Indoor Tracking", IEEE Internet of Things J., vol. 5, no. 5, pp. 4031-4041, Oct. 2018.

29. Feng Zhang, Chen Chen, Beibei Wang, and K. J. Ray Liu, “WiSpeed: A Statistical Electromagnetic Approach for Device-Free Indoor Speed Estimation,” IEEE Internet Things J., vol. 5, no. 3, pp. 2163-2177, Jun. 2018. (Best Paper Award)

30. Beibei Wang, Qinyi Xu, Chen Chen, Feng Zhang, and K. J. Ray Liu, “The Promise of Radio Analytics: A Future Paradigm for Wireless Positioning, Tracking, and Sensing,” IEEE Signal Process. Mag., vol. 35, no. 3, pp. 59-80, May 2018.

31. Qinyi Xu, Zoltan Safar, Yi Han, Beibei Wang, and K. J. Ray Liu, “Statistical Learning over Time-Reversal Space for Indoor Monitoring System,” IEEE Internet Things J., vol. 5, no. 2, pp. 970-983, Apr. 2018.

32. Chen Chen, Yi Han, Yan Chen, Hung-Quoc Lai, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “TR-BREATH: Time-Reversal Breathing Rate Estimation and Detection,” IEEE Trans. on Biomed. Eng., vol. 65, no. 3, pp.489 - 501, March 2018.

33. Meng-Lin Ku, Yi Han, Beibei Wang, and K. J. Ray Liu, “Joint Power Waveforming and Beamforming for Wireless Power Transfer,” IEEE Trans. on Signal Process., vol. 65, no. 24, pp. 6409-6422, Dec 2017.

34. Ke Xiong, Beibei Wang, Chunxiao Jiang, and K. J. Ray Liu, “A Broad Beamforming Approach for High-Mobility Communications,” IEEE Trans. on Vehicular Technology, vol. 66, no. 11, pp.10546-10550, Nov. 2017.

35. Ke Xiong, Beibei Wang, and K. J. Ray Liu, “Rate-Energy Region of SWIPT for MIMO Broadcasting under Nonlinear Energy Harvesting Model,” IEEE Trans. on Wireless Commun., vol. 16, no. 8, pp. 5147 - 5161, Aug. 2017.

36. Chunxiao Jiang, Beibei Wang, Yi Han, Zhung-Han Wu, and K. J. Ray Liu, “Exploring Spatial Focusing Effect for Spectrum Sharing and Network Association,” IEEE Trans. Wireless Commun., vol. 16, no. 7, pp. 4216-4231, July 2017.

37. Zhung-Han Wu, Beibei Wang, Chunxiao Jiang, and K. J. Ray Liu, “Downlink MAC Scheduler for 5G Communications with Spatial Focusing Effects,” IEEE. Trans. Wireless Commun., vol. 16, no. 6, pp. 3968-3980, Jun. 2017.

38. Qinyi Xu, Yan Chen, Beibei Wang, and K. J. Ray Liu, “TRIEDS: Wireless Events Detection Through the Wall,” IEEE Internet of Things Journal, vol. 4, no. 3, pp.723 - 735, June 2017.

39. Qinyi Xu, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Radio Biometrics: Human Recognition Through a Wall,” IEEE Trans. on Information Forensics and Security, vol. 12, no. 5, pp. 1141-1155, May 2017.

40. Yi Han, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Enabling Heterogeneous Connectivity in Internet of Things: A Time-Reversal Approach,” IEEE Internet of Things Journal, vol. 3, no. 6, pp. 1036-1047, Dec. 2016.

41. Yi Han, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Time-Reversal Massive Multipath Effect: A Single-Antenna “Massive MIMO” Solution,” IEEE Trans. Commun., vol. 64, no. 8, pp. 3382-3394, Aug. 2016.

42. Yan Chen, Beibei Wang, Yi Han, Hung-Quoc Lai, Zoltan Safar, and K. J. Ray Liu, “Why Time-Reversal for Future 5G Wireless?” IEEE Signal Process. Mag., vol. 33, no. 2, pp. 17-26, Mar. 2016.

43. Yu-Han Yang, Beibei Wang, Wan-Yi Lin, and K. J. Ray Liu, “Near-Optimal Waveform Design for Sum Rate Optimization in Time-Reversal Multiuser Downlink Systems,” IEEE Trans. Wireless Commun., vol. 12, no. 1, pp. 346-357, Jan. 2013.

44. Feng Han, Yu-Han Yang, Beibei Wang, Yongle Wu, and K. J. Ray Liu, “Time-Reversal Division Multiple Access over Multi-path Channels,” IEEE Trans. Commun., vol. 60, no. 7, pp. 1953-1965, July 2012.

45. Yongle Wu, Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “Anti-Jamming Games in Multi-Channel Cognitive Radio Networks,” IEEE J. Sel. Areas Commun., vol. 30, no. 1, pp. 4-15, Jan. 2012.

46. Beibei Wang, Yongle Wu, Feng Han, Yu-Han Yang, and K. J. Ray Liu, “Green Wireless Communications: A Time-Reversal Paradigm,” IEEE J. Sel. Areas Commun., vol. 29, no. 8, pp. 1698-1710, Sep. 2011.

47. Beibei Wang, Yongle Wu, and K. J. Ray Liu, “An Anti-Jamming Stochastic Game for Cognitive Radio Networks,” IEEE J. Sel. Areas Commun., vol. 29, no. 4, pp. 877-889, Apr. 2011.

48. Beibei Wang and K. J. Ray Liu, “Advances in Cognitive Radio Networks: A Survey,” IEEE J. Sel. Top. Sign. Proces., vol. 5, no. 1, pp. 5-23, Feb. 2011. (2015 IEEE Signal Processing Society Overview Paper Award)

49. Beibei Wang, Yongle Wu, and K. J. Ray Liu, “Game Theory for Cognitive Radio Networks: An Overview,” Computer Networks (Elsevier) Journal, vol. 54, no. 14, pp. 2537-2561, Oct. 2010.

50. Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “Evolutionary Cooperative Spectrum Sensing Game: How to Collaborate?” IEEE Trans. Commun., vol. 58, no. 3, pp. 890-900, Mar. 2010.

51. Yongle Wu, Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “A Scalable Collusion-Resistant Multi-Winner Cognitive Spectrum Auction Game,” IEEE Trans. Commun., vol. 57, no. 12, pp. 3805-3816, Dec. 2009.

52. Beibei Wang, Z. Han, and K. J. Ray Liu, “Distributed Relay Selection and Power Control for Multiuser Cooperative Communication Networks Using Stackelberg Game,” IEEE Trans. Mob. Comput., vol. 8, no. 7, pp. 975-990, Jul. 2009.

53. Yongle Wu, Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “Repeated Open Spectrum Sharing Game with Cheat-Proof Strategies,” IEEE Trans. Wireless Commun., vol. 8, no. 4, pp. 1922-1933, Apr. 2009.

54. Beibei Wang, Zhu Ji, K. J. Ray Liu, and T. Charles Clancy, “Primary-Prioritized Markov Approach for Dynamic Spectrum Allocation,” IEEE Trans. Wireless Commun., vol. 8, no. 4, pp. 1854-1865, Apr. 2009.

55. Beibei Wang, Yongle Wu, Zhu Ji, K. J. Ray Liu, and T. Charles Clancy, “Game Theoretical Mechanism Design Methods: Suppressing Cheating in Cognitive Radio Networks,” IEEE Signal Process Mag., vol. 25, no. 6, pp. 74-84, Nov. 2008.

Conference Papers

1. Sakila S. Jayaweera, Sai Deepika Regani, Yuqian Hu, Beibei Wang, and K. J. Ray Liu, “mmID: High-Resolution mmWave Imaging for Human Identification,” 2023 IEEE World Forum on Internet of Things, Aveiro, 2023.

2. Yuqian Hu, Guozhen Zhu, Beibei Wang, and K. J. Ray Liu, “Robust Proximity Detection using On-Device Gait Monitoring,” 2023 IEEE World Forum on Internet of Things, Aveiro, 2023.

3. Sakila S. Jayaweera, Beibei Wang, Xiaolu Zeng, Wei-Hsiang Wang, and K. J. Ray Liu, “WiFi-based Robust Child Presence Detection for Smart Cars,” Proc. IEEE ICASSP, June 2023.

4. Wei-Hsiang Wang, Xiaolu Zeng Beibei Wang, Yexin Cao, and K. J. Ray Liu, “Improved WiFi-based Respiration Tracking via Contrast Enhancement,” Proc. IEEE ICASSP, June 2023.

5. Sai Deepika Regani, Yuqian Hu, Beibei Wang, and K. J. Ray Liu, “WiFi-based Robust Indoor Localization for Daily Activity Monitoring,” 1st ACM Workshop on Mobile and Wireless Sensing for Smart Healthcare, Australia, Oct. 2022.

6. Guozhen Zhu, Chenshu Wu, Xiaolu Zeng, Beibei Wang, and K. J. Ray Liu, “Who Moved My Cheese? Humand and Non-human Motion Recognition with WiFi,” Proc. IEEE International Conference on Mobile Ad-Hoc and Smart Systems (MASS), Denver, Oct. 2022.

7. Mohammed Zahid Ozturk, Chenshu Wu, Beibei Wang, Min Wu, and K. J. Ray Liu, “Beyond Microphone: mmWave-Based Interference-Resilient Voice Activity Detection,” 1st ACM International Workshop on Intelligent Acoustic Systems and Applications (IASA), July 2022.

8. Mohammed Zahid Ozturk, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “Toward mmWave-Based Sound Enhancement and Separation,” Proc. IEEE ICASSP, Singapore, May 2022.

9. Guozhen Zhu, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “Floor Plan Reconstruction with High-Precision RF-based Tracking,” Proc. IEEE ICASSP, Singapore, May 2022.

10. Xiaolu Zeng, Beibei Wang, Chenshu Wu, Sai Deepika Regani, and K. J. Ray Liu, “Intelligent Wi-Fi Based Child Presence Detection System,” Proc. IEEE ICASSP, Singapore, May 2022.

11. Yuqian Hu, Beibei Wang, Chenshu Wu, and K. J. Ray Liu, “Universal Virtual Keyboard Using 60 GHz mmWave Radar,” 2021 IEEE World Forum on Internet of Things, New Orleans, June 2021. (Best Paper Award)

12. Mohammed Zahid Ozturk, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “Gait-Based Identification with Millimeter-Wave Radio,” 2021 IEEE World Forum on Internet of Things, New Orleans, June 2021.

13. Fengyu Wang, Xiaolu Zeng, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, "Radio Frequency Based Heart Rate Variability Monitoring", Proc. IEEE ICASSP, Toronto, June 2021.

14. Sai Deepika Regani, Beibei Wang, and K. J. Ray Liu, "WIFI-Based Device-Free Gesture Recognition Through-The-Wall", Proc. IEEE ICASSP, Toronto, June 2021.

15. Xiaolu Zeng, Feng Zhang, Beibei Wang, and K. J. Ray Liu, "High Accuracy Tracking for Outdoor Targets Using Massive MIMO", Proc. IEEE ICASSP, Toronto, June 2021.

16. Mohammed Zahid Ozturk, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, "Sound Recovery from Radio Signals", Proc. IEEE ICASSP, Toronto, June 2021.

17. Yuqian Hu, Mohammed Zahid Ozturk, Feng Zhang, Beibei Wang, and K. J. Ray Liu, "Robust Device-Free Proximity Detection Using WIFI", Proc. IEEE ICASSP, Toronto, June 2021.

18.  Xiaolu Zeng, Beibei Wang, and K. J. Ray Liu, "Driver Arrival Sensing for Smart Car using WiFi Fine Time Measurements", APSIPA ASC, Dec 2020.

19. Sai Deepika Regani, Beibei Wang, Min Wu, and K. J. Ray Liu, “Time Reversal Based Robust Gesture Recognition using WiFi”, Proc. IEEE ICASSP, Barcelona, May 2020.

20. Yusen Fan, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “Indoor Heading Direction Estimation using RF Signals”, Proc. IEEE ICASSP, Barcelona, May 2020.

21. Fengyu Wang, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “VIMO: Vital Sign Monitoring using Commodity Millimeter Wave Radio”, Proc. IEEE ICASSP, Barcelona, May 2020.

22. Yuqian Hu, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, “A WiFi-based Passive Fall Detection System”, Proc. IEEE ICASSP, Barcelona, May 2020.

23. Fengyu Wang, Feng Zhang, Chenshu Wu, Beibei Wang, and K. J. Ray Liu, "Passive People Counting using Commodity WiFi", Proc. IEEE 6th World Forum on Internet of Things, New Orleans, April 2020.

24. Sai Deepika Regani, Chenshu Wu, Feng Zhang, Beibei Wang, Min Wu, and K. J. Ray Liu, "Handwriting Tracking using 60 GHz mmWave Radar", Proc. IEEE 6th World Forum on Internet of Things, New Orleans, April 2020.

25. Chenshu Wu, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “mmTrack: Passive Multi-Person Localization Using Commodity Millimeter Wave Radio”, Proc. IEEE INFOCOM, Beijing, April 2020.

26. Sai Deepika Regani, Qinyi Xu, Beibei Wang, Min Wu, and K. J. Ray Liu, “Smart Car: Driver Authentication Using Wireless Sensing,” Proc. IEEE ICASSP, Brighton, May 2019.

27. Feng Zhang, Chen Chen, Beibei Wang, Hung Quoc Lai, Yi Han, and K. J. Ray Liu, “WiDetect: A Robust and Low Complexity Wireless Monition Detector,” Proc. IEEE ICASSP, Calgary, April 2018.

28. Qinyi Xu, Yi Han, Beibei Wang, Min Wu, and K. J. Ray Liu, “Real-Time Indoor Event Monitoring Using CSI Time Series,” Proc. IEEE ICASSP, Calgary, April 2018.

29. Qinyi Xu, Feng Zhang, Beibei Wang, and K. J. Ray Liu, “Time-Reversal Indoor Tracking with Centimeter Accuracy,” Proc. IEEE ICASSP, Calgary, April 2018.

30. Chunxiao Jiang, Beibei Wang, Yi Han, Zhung-Han Wu, and K. J. Ray Liu, “Spatial Focusing Inspired 5G Spectrum Sharing,” Proc. IEEE ICASSP, New Orleans, March 2017.

31. Feng Zhang, Chen Chen, Beibei Wang, Hung Quoc Lai, and K. J. Ray Liu, “A Time-Reversal Spatial Hardening Effect for Indoor Speed Estimation,” Proc. IEEE ICASSP, New Orleans, March 2017.

32. Qinyi Xu, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Time Reversal based Wireless Events Detection,” Proc. IEEE ICASSP, New Orleans, March 2017.

33.  Hang Ma, Beibei Wang, Yan Chen, and K. J. Ray Liu, “Interference Alleviation for Time-Reversal Cloud Radio Access Network,” Proc. IEEE Globecom, Washington DC, Dec. 2016.

34. Yi Han, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Realizing Massive MIMO Effect Using a Single Antenna: A Time-Reversal Approach,” Proc. IEEE Globecom, Washington DC, Dec. 2016.

35. Qinyi Xu, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Radio Shot: Through-the-Wall Human Recognition,” Proc. IEEE GlobalSIP, Washington DC, Dec. 2016.

36. Beibei Wang, Haitong Sun, Rohit Kapoor, Sharad Sambhwani, and Mario Scipione, “Performance Analysis of HSPA Multi-Carrier Heterogeneous Networks,” Proc. IEEE ICC, Ottawa, June 2012.

37. Haitong Sun, Beibei Wang, Rohit Kapoor, Sharad Sambhwani, and Mario Scipione, “Introducing Heterogeneous Networks in HSPA,” Proc. IEEE ICC, Ottawa, June 2012.

38. Feng Han, Yu-Han Yang, Beibei Wang, Yongle Wu, and K. J. Ray Liu, “Time Reversal Division Multiple Access in Multi-path Channels,” Proc. IEEE Globecom, Houston, Dec. 2011.

39. Yu-Han Yang, Beibei Wang, and K. J. Ray Liu, “Waveform Design for Sum Rate Optimization in Time-Reversal Multiuser Downlink Systems,” Proc. IEEE Globecom, Houston, Dec. 2011.

40. Yongle Wu, Beibei Wang, and K. J. Ray Liu, “Optimal Defense Against Jamming Attacks in Cognitive Radio Networks using the Markov Decision Process Approach,” Proc. IEEE Globecom, Miami, FL, Dec. 2010.

41. Yan Chen, Beibei Wang, Wan-Yi Lin, Yongle Wu, and K. J. Ray Liu, “Evolutionary Games for Cooperative P2P Video Streaming,” Proc. IEEE ICIP, Hong Kong, Sep. 2010.

42. Yan Chen, Yongle Wu, Beibei Wang, and K. J. Ray Liu, “An Auction-Based Framework for Multimedia Streaming Over Cognitive Radio Networks,” Proc. IEEE ICASSP, Dallas, Mar. 2010.

43. Yongle Wu, Beibei Wang, and K. J. Ray Liu, “Optimal Power Allocation Strategy Against Jamming Attacks Using the Colonel Blotto Game,” Proc. IEEE Globecom, Honolulu, Hawaii, Nov. 2009.

44. Yan Chen, Beibei Wang, and K. J. Ray Liu, “A Game-Theoretic Framework for Multi-User Multimedia Rate Allocation,” Proc. IEEE ICASSP, Taipei, Taiwan, Apr. 2009.

45. Beibei Wang, Zhu Han, and K. J. Ray Liu, “Peer-to-Peer File Sharing Game Using Correlated Equilibrium,” CISS, Baltimore, MD, Mar. 2009.

46. Yongle Wu, Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “Collusion-Resistant Multi-Winner Spectrum Auction for Cognitive Radio Networks,” Proc. IEEE Globecom, New Orleans, Nov. 2008.

47. Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “Evolutionary Game Framework for Behavior Dynamics in Cooperative Spectrum Sensing,” Proc. IEEE Globecom, New Orleans, Nov. 2008.

48. Yongle Wu, Beibei Wang, K. J. Ray Liu, and T. Charles Clancy, “A Multi-Winner Cognitive Spectrum Auction Framework with Collusion-Resistant Mechanisms,” Proc. IEEE DySPAN, Chicago, Oct. 2008.

49. Yongle Wu, Beibei Wang, and K. J. Ray Liu, “Repeated Spectrum Sharing Game with Self-Enforcing Truth-Telling Mechanism,” Proc. IEEE ICC, pp. 3583-3587, Beijing, May 2008.

50. Beibei Wang, Chia-Chin Chong, Fujio Watanabe, and K. J. Ray Liu, “Dynamic Frequency-Intelligent Reserve-and-Switch Technique (D-FIRST) to Combat Inter-Operator Interference,” Proc. IEEE ICC, pp. 4003-4008, Beijing, May 2008.

51. T. Charles Clancy, Zhu Ji, Beibei Wang, and K. J. Ray Liu, “Planning Approach to Dynamic Spectrum Access in Cognitive Radio Networks,” Proc. IEEE Globecom, Washington DC, Nov. 2007 (invited paper).

52. Beibei Wang, Zhu Ji, and K. J. Ray Liu, “Self-Learning Repeated Game Framework for Distributed Primary-Prioritized Dynamic Spectrum Access,” Proc. IEEE Workshop on Networking Technologies for Software Defined Radio (SDR) Networks, pp. 631-638, San Diego, Jun. 2007.

53. Beibei Wang, Zhu Han, and K. J. Ray Liu, “Distributed Relay Selection and Power Control for Multiuser Cooperative Communication Networks Using Buyer/Seller Game,” Proc. IEEE INFOCOM, pp. 544-552, Anchorage, May 2007.

54. Beibei Wang, Zhu Ji, and K. J. Ray Liu, “Primary-Prioritized Markov Approach for Dynamic Spectrum Access,” Proc. IEEE DySPAN, pp. 507-515, Dublin, Ireland, Apr. 2007.

55. Beibei Wang, Zhu Han, and K. J. Ray Liu, “Stackelberg Game for Distributed Resource Allocation over Multiuser Cooperative Communication Networks,” Proc. IEEE Globecom, San Francisco, Nov. 2006.

Selected Patent Applications 

1. Muhammed Zahid Ozturk, Sai Deepika Regani, Yuqian Hu, Beibei Wang, K. J. Ray Liu, Yi Han, David N. Claffey, Hung-Quoc Duc Lai, Linghe Wang, Chun-I Chen, Jack Chun-Chia Shih, Oscar Chi-Lim Au, “Method, Apparatus, and System for Wireless Monitoring, Sensing and Localization”, JP Patent Application No. 2023-101874, filed June 21, 2023.

2. Muhammed Zahid Ozturk, Sai Deepika Regani, Yuqian Hu, Beibei Wang, K. J. Ray Liu, Yi Han, David N. Claffey, Hung-Quoc Duc Lai, Linghe Wang, Chun-I Chen, Jack Chun-Chia Shih, Oscar Chi-Lim Au, “Method, Apparatus, and System for Wireless Monitoring, Sensing and Localization”, EP Patent Application No. 23180767.8, filed June 21, 2023.

3. Oscar Chi-Lim Au, Beibei Wang, Hung-Quoc Duc Lai, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING MEASUREMENT AND REPORTING”, U.S. Patent Application No. 18/199,963, filed May 21, 2023.

4. Sai Deepika Regani, Yuqian Hu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “Method, Apparatus, and System for Correlation-based Wireless Monitoring and Localization”, U.S. Patent Application No. 18/211,567, filed June 19, 2023.

5. Chen Chen, Feng Zhang, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Periodic Motion Detection and Monitoring”, Europe Patent Application No. 23180318.0, filed June 20, 2023.

6. Chen Chen, Feng Zhang, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Periodic Motion Detection and Monitoring”, Japan Patent Application No. 2023-076862, filed May 8, 2023.

7. Muhammed Zahid Ozturk, Sai Deepika Regani, Beibei Wang, K, J. Ray Liu, Hung-Quoc Duc Lai, Yi Han, Oscar Chi-Lim Au, “Method, Apparatus, and System for Wireless Monitoring with Improved Accuracy”, U.S. Patent Application No. 18/144,321, filed May 8, 2023.

8. David N. Claffey, Hung-Quoc Duc Lai, Linghe Wang, Chun-I Chen, Chun-Chia Jack Shih, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING BASED ON MULTIPLE GROUPS OF WIRELESS DEVICES”, U.S. Patent Application No. 18/108,563, filed Feb. 10, 2023.

9. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Object Tracking and Navigation”, Japan Patent Application No. 2023-020188, filed Feb 13, 2023.

10.  Beibei Wang, Chenshu Wu, Guozhen Zhu, Muhammed Zahid Ozturk, Fengyu Wang, K. J. Ray Liu, Hung-Quoc Duc Lai, Sakila S. Jayaweera, Sai Deepika Regani, Xiaolu Zeng, Wei-Hsiang Wang, Oscar Chi-Lim Au, Min Wu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING, MONITORING AND TRACKING”, Japan Patent Application No. JP 2022-161967, filed October 6, 2022.

11. Beibei Wang, Chenshu Wu, Guozhen Zhu, Muhammed Zahid Ozturk, Fengyu Wang, K. J. Ray Liu, Hung-Quoc Duc Lai, Sakila S. Jayaweera, Sai Deepika Regani, Xiaolu Zeng, Wei-Hsiang Wang, Oscar Chi-Lim Au, Min Wu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING, MONITORING AND TRACKING”, EP Patent Application No. 22200097.8, filed October 6, 2022.

12. Oscar Chi-Lim Au, Beibei Wang, K. J. Ray Liu, Hung-Quoc Duc Lai, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING MEASUREMENT AND REPORTING”, PCT Patent Application No. PCT/US22/45708, filed October 4, 2022.

13. Beibei Wang, Sakila S. Jayaweera, Xiaolu Zeng, Wei-Hsiang Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR ENHANCED WIRELESS MONITORING OF VITAL SIGNS”, U.S. Patent Application No. 17/960,080, filed October 4, 2022.

14. Muhammed Zahid Ozturk, Chenshu Wu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, Min Wu, “METHOD, APPARATUS, AND SYSTEM FOR VOICE ACTIVITY DETECTION BASED ON RADIO SIGNALS”, U.S. Patent Application No. 17/959,487, filed October 4, 2022.

15. Fengyu Wang, Beibei Wang, Xiaolu Zeng, Chenshu Wu, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS VITAL MONITORING USING HIGH FREQUENCY SIGNALS”, U.S. Patent Application No.  17/945,995, filed September 15, 2022.

16. Guozhen Zhu, Chenshu Wu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR MAP RECONSTRUCTION BASED ON WIRELESS TRACKING”, U.S. Patent Application No.  17/891,037, filed August 18, 2022.

17. Chenshu Wu, Beibei Wang, Oscar Chi-Lim Au, Hung-Quoc Duc Lai, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR RADIO BASED SLEEP TRACKING”, U.S. Patent Application No.  17/888,429, filed August 15, 2022, allowed May 24, 2023.

18. Beibei WANG, Muhammed Zahid OZTURK, Chenshu WU, Xiaolu ZENG, Sai Deepika REGANI, Yuqian HU, K. J. Ray LIU, Oscar Chi-Lim AU, Yi HAN, Hung-Quoc Duc LAI, David N. CLAFFEY, Chun-I CHEN, Dan BUGOS and Peng ZAN, “METHOD, APPARATUS, AND SYSTEM FOR SOUND SENSING AND WIRELESS SENSING”, Japan Patent Application No. 2022-095307, filed June 13, 2022.

19. Beibei WANG, Muhammed Zahid OZTURK, Chenshu WU, Xiaolu ZENG, Sai Deepika REGANI, Yuqian HU, K. J. Ray LIU, Oscar Chi-Lim AU, Yi HAN, Hung-Quoc Duc LAI, David N. CLAFFEY, Chun-I CHEN, Dan BUGOS and Peng ZAN, “METHOD, APPARATUS, AND SYSTEM FOR SOUND SENSING AND WIRELESS SENSING”, EP Patent Application No. 22178761.7, filed June 13, 2022.

20. Yuqian Hu, Beibei Wang, Sai Deepika Regani, Peng Zan, Chenshu Wu, Dan Bugos, Xiaolu Zeng, Hung-Quoc Duc Lai, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING BASED ON LINKWISE MOTION STATISTICS”, U.S. Patent Application No. 17/838,244, filed June 12, 2022.

21. Beibei Wang, Yuqian Hu, Sai Deepika Regani, Yi Han, Hung-Quoc Duc Lai, David N. Claffey, Chun-I Chen, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR IDENTIFYING AND QUALIFYING DEVICES FOR WIRELESS SENSING”, U.S. Patent Application No. 17/838,231, filed June 12, 2022.

22. Xiaolu Zeng, Beibei Wang, Chenshu Wu,Sai Deepika Regani, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING BASED ON CHANNEL INFORMATION”, U.S. Patent Application No. 17/838,228, filed June 12, 2022.

23. Muhammed Zahid Ozturk, Chenshu Wu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR SPEECH ENHANCEMENT AND SEPARATION BASED ON AUDIO AND RADIO SIGNALS”, U.S. Patent Application No. 17/827,902, filed May 30, 2022.

24. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Object Tracking and Navigation”, Japan Patent Application No. 2021-178960, filed Dec. 22, 2021.

25. Chao-Lun Mai, Jeng-Feng Lee, David N. Claffey, Hangfang Zhang, Hung-Quoc Duc Lai, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR POSITIONING AND POWERING A WIRELESS MONITORING SYSTEM”, U.S. Patent Application No.  17/540,156, field December 1, 2021.

26. Sai Deepika Regani, Qinyi Xu, Beibei Wang, Min Wu, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR HUMAN IDENTIFICATION BASED ON HUMAN RADIO BIOMETRIC INFORMATION”, U.S. Patent Application No. 17/539,058, filed November 30, 2021. 

27. Chao-Lun Mai, Jeng-Feng Lee, Hung-Quoc Duc Lai, Dan Bugos, Hangfang Zhang, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR AUTOMATIC AND ADAPTIVE WIRELESS MONITORING AND TRACKING”, U.S. Patent Application No. 17/537,432, filed November 29, 2021.

28. Chao-Lun Mai, Beibei Wang, Chenshu Wu, K. J. Ray Liu, Hung-Quoc Duc Lai, Dan Bugos, Spencer Maid, Oscar Chi-Lim Au, Sai Deepika Regani, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING TO ENSURE SECURITY”, Japan Patent Application No. 2021-163689, filed October 4, 2021.

29. Chenshu WU; Beibei WANG; Oscar Chi-Lim AU; K.J. Ray LIU; Chao-Lun MAI; Dan BUGOS; Hung-Quoc Duc LAI; Spencer MAID; Yuqian HU; Sai Deepika REGANI; Muhammed Zahid OZTURK; Xiaolu ZENG; Fengyu WANG; Jeng-Feng LEE and Peng ZAN, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING TO ENSURE SECURITY”, EP Patent Application No. 21200823.9, filed October 4, 2021.

30. Chenshu Wu, Beibei Wang, Xiaolu Zeng, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR MOVEMENT TRACKING”, U.S. Patent No. 11,639,981, filed October 3, 2021, granted May 2, 2023.

31. Muhammed Zahid Ozturk, Chenshu Wu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR SOUND SENSING BASED ON WIRELESS SIGNALS”, U.S. Patent No. 11,448,728, filed October 2, 2021, granted September 20, 2022.

32. Muhammed Zahid Ozturk, Chenshu Wu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR HUMAN RECOGNITION BASED ON GAIT FEATURES”, U.S. Patent No. 11,448,727, filed October 2, 2021, granted September 20, 2022.

33. Chao-Lun Mai, Dan Bugos, Hung-Quoc Duc Lai, Spencer Maid, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING TO ENSURE SECURITY”, U.S. Patent Application No. 17/352,306, filed June 20, 2021.

34. Chenshu Wu, Beibei Wang, Peng Zan, Sai Deepika Regani ,Xiaolu Zeng, Hung-Quoc Duc Lai,K. J. Ray Liu,Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MICRO MOTION MONITORING ”, U.S. Patent Application No. 17/352,185, filed June 18, 2021.

35. Fengyu Wang, Beibei Wang, Xiaolu Zeng, Chenshu Wu, Yuqian Hu, Muhammed Zahid Ozturk, Feng Zhang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS VITAL MONITORING USING HIGH FREQUENCY SIGNALS”, Japan Patent Application No. 2021-055725, filed March 29, 2021.

36. Fengyu Wang, Beibei Wang, Xiaolu Zeng, Chenshu Wu, Yuqian Hu, Muhammed Zahid Ozturk, Feng Zhang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS VITAL MONITORING USING HIGH FREQUENCY SIGNALS”, Europe Patent Application No. 21165729.1, filed March 29, 2021.

37. Qinyi Xu, Beibei Wang, Hung-Quoc Duc Lai, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “APPARATUS, SYSTEMS AND METHODS FOR EVENT DETECTION AND RECOGNITION BASED ON A WIRELESS SIGNAL”, Europe Patent Application No. 21161604.0, filed March 9, 2021.

38. Feng Zhang, Beibei Wang, Chen Chen, Hung-Quoc Duc Lai, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS AND SYSTEM FOR WIRELESS MOTION MONITORING”, Europe Patent Application No. 21168895.7, filed April 16, 2021.

39. Chao-Lun Mai, Hung-Quoc Duc Lai, David N. Claffey, Dan Bugos, Hangfang Zhang, Feng Zhang, Beibei Wang, Oscar Chi-Lim Au, Masato Marumo, Jeng-Feng Lee, and K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING”, Japan Patent Application No. 2021-026655, filed February 22, 2021.

40. Chenshu Wu, Beibei Wang, Deepika Regani, Feng Zhang, Yuqian Hu, Hung-Quoc Duc Lai, Oscar Chi-Lim Au, Dan Bugos, Wenchao Xi, Min Wu, and K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SENSING, MONITORING AND RECOGNITION”, Japan Patent Application No. 2021-026650, filed February 22, 2021.

41. Chao-Lun Mai, Hung-Quoc Duc Lai, David N. Claffey, Dan Bugos, Hanfang Zhang, Feng Zhang, Beibei Wang, Oscar Chi-Lim Au, Masato Marumo, Jeng-Feng Lee, and K. J. Ray Liu, “Method, Apparatus, and System for Wireless Monitoring”, Europe Patent Application No. 21158554.2, filed February 23, 2021.

42. Chenshu Wu, Beibei Wang, Sai Deepika Regani, Feng Zhang, Yuqian Hu, Hung-Quoc Duc Lai, Oscar Chi-Lim Au, Dan Bugos, Wenchao Xi, Min Wu, and K. J. Ray Liu, “Method, Apparatus, and System for Wireless Sensing, Monitoring and Recognition”, Europe Patent Application No. 21158553.4, filed February 23, 2021.

43. Sai Deepika Regani, Beibei Wang, Min Wu and K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR Wireless Motion Recognition”, U.S. Patent Application No. 17/180,766, filed February 20, 2021.

44. Yuqian Hu, Beibei Wang, Chenshu Wu, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESSLY TRACKING KEYSTROKES”, U.S. Patent No. 11,500,057, filed March 27, 2021, granted November 15, 2022.

45. Yuqian Hu, Beibei Wang, M. Zahid Ozturk, Feng Zhang, K. J. Ray Liu, Oscar Chi-Lim Au, Xiaolu Zeng, Chenshu Wu, Fengyu Wang, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS PROXIMITY SENSING”, U.S. Patent No. 11,500,058, filed February 20, 2021, granted November 15, 2022

46. Fengyu Wang, Beibei Wang, Xiaolu Zeng, Chenshu Wu, K. J. Ray Liu, Oscar Chi-Lim Au, , “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS VITAL MONITORING USING HIGH FREQUENCY SIGNALS”, U.S. Patent No. 11340328, filed March 27, 2021, granted May 24, 2022.

47. Yuqian Hu, Feng Zhang, Beibei Wang, Chenshu Wu, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR FALL-DOWN DETECTION BASED ON A WIRELESS SIGNAL”, U.S. Patent No. 11,531,087, filed February 20, 2021, granted December 20, 2022.

48. Sai Deepika Regani, Chenshu Wu, Beibei Wang, Min Wu and K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS WRITING TRACKING”, U.S. Patent No. 11,592,913, filed February 20, 2021, granted February 28, 2023.

49. Chao-Lun Mai, Beibei Wang, Dan Bugos, Oscar Chi-Lim Au, Hung-Quoc Duc Lai, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING WITH FLEXIBLE POWER SUPPLY”, U.S. Patent Application No. 17/149,667, filed January 14, 2021.

50. Feng Zhang, Beibei Wang, Hung-Quoc Duc Lai, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING WITH MOTION LOCALIZATION”, U.S. Patent Application No. 17/149,625, filed January 14, 2021.

51. Feng Zhang, Beibei Wang, Hung-Quoc Duc Lai, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR ACCURATE WIRELESS MONITORING”, U.S. Patent Application No.  17/113,023, filed December 5, 2020, allowed May 1, 2023.

52. Masato Marumo, Beibei Wang, Oscar Chi-Lim Au, Hung-Quoc Duc Lai, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR PROVIDING AUTOMATIC ASSISTANCE BASED ON WIRELESS MONITORING”, U.S. Patent No.  11202215, filed December 5, 2020, granted Dec. 14, 2021.

53. Chao-Lun Mai, Jeng-Feng Lee, David N. Claffey, Hangfang Zhang, Feng Zhang, Hung-Quoc Duc Lai, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR VEHICLE WIRELESS MONITORING”, U.S. Patent Application No.  17/019,270, filed September 13, 2020.

54. Feng Zhang, Beibei Wang, Chenshu Wu, Min Wu, Dan Bugos, Hangfang Zhang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS SLEEP MONITORING”, U.S. Patent No. 11,439,344, filed August 1, 2020, granted September 13, 2022.

55. Dan Bugos, Feng Zhang, Chun-Chia Jack Shih, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR PROCESSING AND PRESENTING LIFE LOG BASED ON A WIRELESS SIGNAL”, U.S. Patent No. 11,444,710, filed August 1, 2020, granted September 13, 2022.

56. Oscar Chi-Lim Au, Beibei Wang, K. J. Ray Liu, Hung-Quoc Duc Lai, Feng Zhang, Chenshu Wu, David N. Claffey, “METHOD, APPARATUS, AND SYSTEM FOR QUALIFIED WIRELESS SENSING”, U.S. Patent No. 11,391,830, filed June 23, 2020, granted July 19, 2022.

57. David N. Claffey, Zhung-Han Wu, Hung-Quoc Duc Lai, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, Jeng-Feng Lee, Chao-Lun Mai, Feng Zhang, “METHOD, APPARATUS, AND SYSTEM FOR IMPROVING TOPOLOGY OF WIRELESS SENSING SYSTEMS”, U.S. Patent Application No. 16/909,913, filed June 23, 2020.

58. Chenshu Wu, Feng Zhang, Beibei Wang, Yusen Fan, K. J. Ray Liu, Oscar Chi-Lim Au, Fengyu Wang, Sai Deepika Regani, Dan Bugos, Chun-Chia Jack Shih, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS TRACKING, SCANNING AND MONITORING”, Europe Patent Application No. 20174194.9, filed May 12, 2020.

59. Chenshu Wu, Feng Zhang, Beibei Wang, Yusen Fan, K. J. Ray Liu, Oscar Chi-Lim Au, Fengyu Wang, Sai Deepika Regani, Dan Bugos, Chun-Chia Jack Shih, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS TRACKING, SCANNING AND MONITORING”, Japan Patent Application No. 2020-084122, filed May 12, 2020.

60. Fengyu Wang, Beibei Wang, Chenshu Wu, Feng Zhang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR VITAL SIGNS MONITORING USING HIGH FREQUENCY WIRELESS SIGNALS”, U.S. Patent No. 11,408,978, filed May 10, 2020, granted August 9, 2022.

61. Fengyu Wang, Beibei Wang, Sai Deepika Regani, Feng Zhang, Chenshu Wu, Dan Bugos, Chun-Chia Jack Shih, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR PEOPLE COUNTING AND RECOGNITION BASED ON RHYTHMIC MOTION MONITORING”, U.S. Patent Application No. 16/871,004, filed May 10, 2020.

62. Chenshu Wu, Feng Zhang, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR Wireless Material Sensing”, U.S. Patent No. 11181486, filed February 20, 2021, granted Nov. 23, 2021.

63. Chenshu Wu, Feng Zhang, Yusen Fan, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS INERTIAL MEASUREMENT”, U.S. Patent No. 10866302, filed May 10, 2020, granted December 15, 2020.

64. Chenshu Wu, Feng Zhang, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS TRACKING WITH GRAPH-BASED PARTICLE FILTERING”, U.S. Patent No. 11,500,056, filed May 10, 2020, granted November 15, 2022.

65. Chenshu Wu, Feng Zhang, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS OBJECT TRACKING”, U.S. Patent No. 11340345, filed February 22, 2020, granted May 24, 2022.

66. Feng Zhang, Chenshu Wu, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, “Method, Apparatus, and System for Wireless Object Scanning”, U.S. Patent No. 10,845,463, filed Feb 22, 2020, granted Nov. 24, 2020.

67. Chenshu Wu, Feng Zhang, Beibei Wang, Yuqian Hu, K. J. Ray Liu, Oscar Chi-Lim Au, Xiaolu Zeng, Hung-Quoc Duc Lai, David N Claffey, Jeng-Feng Lee, Chao-Lun Mai, Zhung-Han Wu, Dan Bugos, Chun-Chia Jack Shi, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS GAIT RECOGNITION”, Europe Patent Application No. 20157771.5, filed February 17, 2020.

68. Feng Zhang, Beibei Wang, Yuqian Hu, K. J. Ray Liu, Oscar Chi-Lim Au, Xiaolu Zeng, Hung-Quoc Duc Lai, David N Claffey, Jeng-Feng Lee, Chao-Lun Mai, Zhung-Han Wu, Dan Bugos, Chun-Chia Jack Shi, “METHOD, APPARATUS, AND SYSTEM FOR WIRELESS GAIT RECOGNITION”, Japan Patent Application No. 2020-024532, filed February 17, 2020.

69. Xiaolu Zeng, Feng Zhang, Beibei Wang, K. J. Ray Liu, Oscar Chi-Lim Au, Chenshu Wu, “METHOD, APPARATUS, AND SYSTEM FOR OUTDOOR TARGET TRACKING”, U.S. Patent No. 11,397,258, filed February 13, 2020, granted July 26, 2022.

70. Chenshu Wu, Feng Zhang, Beibei Wang, Yuqian Hu, K. J. Ray Liu, METHOD, APPARATUS, AND SYSTEM FOR WIRELESS GAIT RECOGNITION, U.S. Patent Application No. 16/790,610, filed February 13, 2020.

71. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Zoltan Safar, Yi Han, Hung-Quoc Duc Lai, K. J. Ray Liu, “METHOD, APPARATUS, AND SYSTEM FOR TARGET POSITIONING”, Japan Patent Application No. 2019-212505, filed November 25, 2019, allowed Jun 23, 2023.

72. Qinyi Xu, Yi Han, Hung-Quoc Duc Lai, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Wireless Proximity and Presence Monitoring”, U.S. Patent No. 11035940, filed Oct. 29, 2019, granted June 15, 2021.

73. Hung-Quoc Duc Lai, David N. Claffey, Chen Chen, Feng Zhang, Chenshu Wu, Chau-Wai Wong, Beibei Wang, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Object Tracking and Sensing Using Broadcasting”, U.S. Patent No. 10742344, filed June 19, 2019, granted Aug. 11, 2020.

74. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Apparatus, Systems and Methods for Event Recognition based on a Wireless Signal”, Europe Patent No. 3492944, filed Dec. 3, 2018, granted May 5, 2021.

75. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Object Tracking and Navigation”, Europe Patent No. 3492946, filed Dec. 3, 2018, granted May 12, 2021.

76. Chen Chen, Feng Zhang, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Periodic Motion Detection and Monitoring”, Europe Patent No. 3492945, filed Dec. 3, 2018, granted Aug 9, 2023.

77. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Apparatus, Systems and Methods for Fall-Down Detection based on a Wireless Signal”, Japan Patent Application No. 2018-226508, filed Dec. 3, 2018.

78. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Apparatus, Systems and Methods for Event Recognition based on a Wireless Signal”, Japan Patent Application No. 2018-226507, filed Dec. 3, 2018.

79. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Object Tracking and Navigation”, Japan Patent No. 7228375, filed Dec. 3, 2018, granted May 11, 2023.

80. Chen Chen, Feng Zhang, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Periodic Motion Detection and Monitoring”, Japan Patent No. 7278682, filed Dec. 3, 2018, granted Apr. 10, 2023.

81. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Apparatus, Systems and Methods for Fall-Down Detection based on a Wireless Signal”, U.S. Patent No. 10397039, filed Nov. 28, 2018, granted Aug. 27, 2019.

82. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Apparatus, Systems and Methods for Event Recognition based on a Wireless Signal”, U.S. Patent No. 10374863, filed Nov. 28, 2018, granted Aug. 5, 2019.

83. Feng Zhang, Chen Chen, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, Server and System for Vital Sign Detection and Monitoring”, U.S. Patent No. 10495725, filed Nov. 26, 2018, granted Dec. 3, 2019.

84. Chen Chen, Feng Zhang, Qinyi Xu, Beibei Wang, Chenshu Wu, Hangfang Zhang, Chau-Wai Wong, David N. Claffey, Chun-I Chen, Hung-Quoc Duc Lai, Zhung-Han Wu, Min Wu, Yi Han, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, Server and System for Vital Sign Detection and Monitoring”, U.S. Patent No. 10735298, filed Nov. 26, 2018, granted Aug. 4, 2020.

85. Chen Chen, Beibei Wang, Yi Han, Feng Zhang, Hung-Quoc Duc Lai, Yan Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Vital Signs Detection and Monitoring”, Japan Patent No. 6900390, filed Sep. 10, 2018, granted June 18, 2021.

86. Feng Zhang, Chen Chen, Yi Han, Beibei Wang, Hung-Quoc Duc Lai, Zhung-Han Wu, Chun-I Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Object Tracking”, Japan Patent No. 6971254, filed Oct. 12, 2018, granted November 4, 2021.

87. Feng Zhang, Chen Chen, Yi Han, Beibei Wang, Hung-Quoc Duc Lai, Zhung-Han Wu, Chun-I Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Object Tracking”, Europe Patent Application No. 17783028.8, filed Oct. 8, 2018.

88. Feng Zhang, Chen Chen, Yi Han, Beibei Wang, Hung-Quoc Duc Lai, Zhung-Han Wu, Chun-I Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Object Tracking”, China Patent No. 109073389B, filed Nov. 8, 2018, granted Apr. 11, 2023.

89. Qinyi Xu, Yan Chen, Beibei Wang, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Human Identification based on Human Radio Biometric Information”, Japan Patent No. 6931790, filed Sep. 10, 2018, granted Aug. 19, 2021. 

90. Qinyi Xu, Yan Chen, Beibei Wang, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Human Identification based on Human Radio Biometric Information”, Europe Patent No. 3426148, filed Sep. 7, 2018, granted Sep 28, 2022.

91. Chen Chen, Beibei Wang, Yi Han, Feng Zhang, Hung-Quoc Duc Lai, Yan Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Vital Signs Detection and Monitoring”, Europe Patent Application No. 17764257.6, filed Sep. 6, 2018.

92. Chen Chen, Beibei Wang, Yi Han, Feng Zhang, Hung-Quoc Duc Lai, Yan Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Vital Signs Detection and Monitoring”, China Patent No. 108778106, filed Sep. 5, 2018, granted Sep 7, 2021.

93. Chen Chen, Beibei Wang, Yi Han, Feng Zhang, Hung-Quoc Duc Lai, Yan Chen, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Vital Signs Detection and Monitoring”, U.S. Patent No. 11012285, filed Sep. 10, 2018, granted May 18, 2021.

94. Qinyi Xu, Yan Chen, Beibei Wang, K. J. Ray Liu, “Methods, Apparatus, Servers, and Systems for Human Identification based on Human Radio Biometric Information”, U.S. Patent No. 10476730, filed Sep. 10, 2018, granted Nov. 12, 2019.

95. Oscar Chi-Lim Au, Masato Marumo, Beibei Wang, Hung-Quoc Duc Lai, K. J. Ray Liu, Chen Chen, Qinyi Xu, Yi Han, Zhung-Han Wu, Feng Zhang, Zoltan Safar, Jeng-Feng Lee, Thomas Buttermore, “Methods, Devices, Servers, Apparatus, and Systems for Wireless Internet of Things Applications”, U.S. Patent No. 10,833,912, filed Sep. 9, 2018, granted Nov. 10, 2020.

96. Feng Zhang, Chen Chen, Beibei Wang, Hung-Quoc Duc Lai, Oscar Chi-Lim Au, K. J. Ray Liu, “Method, Apparatus, and System for Wireless Motion Monitoring”, U.S. Patent No. 10291460, filed Aug. 11, 2018, granted May 14, 2019.

97. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Zoltan Safar, Yi Han, Hung-Quoc Duc Lai, K. J. Ray Liu, “Methods, Apparatus, and Systems for Wireless Event Detection and Monitoring”, U.S. Patent No. 10380881, filed Jun. 8, 2018, granted Aug. 13, 2019.

98. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Zoltan Safar, Yi Han, Hung-Quoc Duc Lai, K. J. Ray Liu, “Methods, Apparatus, and Systems for Wireless Event Detection and Monitoring”, Japan Patent No. 6623298, filed Jun. 7, 2018, granted Dec. 18, 2019.

99. Feng Zhang, Hung-Quoc Duc Lai, Chun-I Chen, Chau-Wai Wong, Beibei Wang, Chen Chen, Oscar Chi-Lim Au, Yi Han, K. J. Ray Liu, “Method, Apparatus, and System for Object Tracking and Navigation”, U.S. Patent No. 10270642, filed Jan. 17, 2018, granted Apr. 23, 2019.

100. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Zoltan Safar, Yi Han, Hung-Quoc Duc Lai, K. J. Ray Liu, “Methods, Apparatus, and Systems for Wireless Event Detection and Monitoring”, Europe Patent Application No. 16874008.2, filed Jul. 9, 2018.

101. Qinyi Xu, Feng Zhang, Chen Chen, Beibei Wang, Zoltan Safar, Yi Han, Hung-Quoc Duc Lai, K. J. Ray Lui, “Methods, Apparatus, and Systems for Wireless Event Detection and Monitoring”, China Patent No. 108700652B, filed Jun. 7, 2018, granted Apr. 21, 2023.

102. K. J. Ray Liu, Hung-Quoc Duc Lai, Beibei Wang, Chen Chen, Oscar Chi-Lim Au, “Method, Apparatus, Server, and Systems of Time-Reversal Technology”, U.S. Patent No. 11025475, filed Jan. 3, 2018, granted June 1, 2021.

103. Zhung-Han Wu, Beibei Wang, Chunxiao Jiang, Zoltan Safar, K. J. Ray Liu, “Methods, Devices, Apparatus, and Systems for Medium Access Control in Wireless Communication Systems Utilizing Spatial Focusing Effect”, U.S. Patent No. 10129862, filed Feb. 16, 2017, granted Nov. 13, 2018.

104. K. J. Ray Liu, Hung-Quoc Duc Lai, Beibei Wang, Qinyi Xu, Chen Chen, Feng Zhang, Yi Han, Zhung-Han Wu, Zoltan Safar, and Oscar Chi-Lim Au, “Method, Apparatus, Server, and Systems of Time-Reversal Technology,” U.S. Patent No. 10440705, filed Dec. 19, 2016, granted Oct. 8, 2019.

105. Meng-Lin Ku, Yi Han, Hung-Quoc Duc Lai, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Method, System, and Apparatus for Wireless Power Transmission based on Power Waveforming,” U.S. Patent No. 10447094, filed May 2, 2017, granted Oct. 15, 2019.

106. Yi Han, Yu-Han Yang, Yan Chen, K. J. Ray Liu, Hang Ma, Beibei Wang, Hung-Quoc Duc Lai, Zoltan Safar, Qinyi Xu, Chen Chen, “Time Reversal Communication Systems”, U.S. Patent No. 10327213, filed Oct. 3, 2016, granted Jun. 18, 2019.

107. Yi Han, Yan Chen, Beibei Wang, and K. J. Ray Liu, “Methods, Devices and Systems of Heterogeneous Time-Reversal Paradigm Enabling Direct Connectivity in Internet of Things”, U.S. Patent No. 9887864, filed Sep. 16, 2016, granted Feb. 6, 2018.

108. Yu-Han Yang, Beibei Wang, K. J. Ray Liu, “Waveform Design for Time-Reversal Systems”, U.S. Patent No. 9883511, filed Dec. 5, 2012, granted Jan. 30, 2018.

109. Saurabha Rangrao Tavildar, Bilal Sadiq, Shreeshankar Ravishankar Bodas, Qiao Li, Beibei Wang, “Control Signaling for Enabling Two-Hop Orthogonalization for Device-to-Device Broadcasts”, U.S. Patent No. 9584291, filed July 22, 2014, granted Feb. 28, 2017.

110. Beibei Wang, Saurabha Rangrao Tavildar, Qiao Li, Bilal Sadiq, Shreeshankar Ravishankar Bodas, “IBE Aware Channel Selection”, U.S. Patent No. 9185667, filed July 15, 2014, granted Nov. 10, 2015.

111. Feng Han, Yu-Han Yang, Beibei Wang, Yongle Wu, K. J. Ray Liu, “System and Methods for Time-Reversal Division Multiple Access Wireless Broadband Communications”, U.S. Patent No. 10122409, filed Dec. 3, 2013, granted Nov. 6, 2018.

112. Haitong Sun, Beibei Wang, Sharad Deepak Sambhwani, Rohit Kapoor, “Method and Apparatus for Managing Mobility Events in a Dual-frequency Dual-Cell Wireless Communication Network”, U.S. Patent No. 9137717, filed July 30, 2012, granted Sep. 15, 2015.