Welcome to

Tsung-Hui Chang WEBSITE

Biography

Tsung-Hui Chang received the B.S. degree in electrical engineering and the Ph.D. degree in communications engineering from the National Tsing Hua University (NTHU), Hsinchu, Taiwan, in 2003 and 2008, respectively. From 2012 to 2015, he was an Assistant Professor with the Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology (NTUST), Taipei, Taiwan. In August 2015, Dr. Chang joined the School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, China, as an Assistant Professor, and since August 2018, as an Associate Professor. Prior to being a faculty member, Dr. Chang held research positions with NTHU, from 2008 to 2011, and the University of California, Davis, CA, USA, from 2011 to 2012. During his PhD study, Dr. Chang was a visiting student and research assistant in the University of Minnesota, Minneapolis, MN, USA. His research interests include signal processing and optimization problems in data communications, machine learning and big data analysis.

Dr. Chang received the Young Scholar Research Award of NTUST in 2014, IEEE ComSoc Asian-Pacific Outstanding Young Researcher Award in 2015, and the IEEE Signal Processing Society (SPS) Best Paper Award in 2018. He has served as an Associate Editor of IEEE TRANSACTIONS ON SIGNAL PROCESSING (2014/08-2018/12) and IEEE TRANSACTIONS ON SIGNAL AND INFORMATION PROCESSING OVER NETWORKS (2015/01-2018/12). Currently, he is an Associate Editor of IEEE OPEN JOURNAL OF SIGNAL PROCESSING (2020/01-). He is also an elected member of IEEE SPS Signal Processing for Communications and Networking Technical Committee (SPCOM TC) (2020/01-).

Research

General research interests are the applications of signal processing and optimization theories to data communications, machine learning and big data analysis.

**Selected Publications**

**(1) Distributed Optimization/Optimization for Machine Learning**

9. S. Wang and **T.-H. Chang**, "Federated clustering via matrix factorization models: From model averaging to gradient sharing," submitted for publication, 2020.

8. S. Wang, **T.-H. Chang**, Y. Cui and J.-S. Pang, "Clustering by orthogonal NMF model and non-convex penalty optimization," submitted for publication, 2019.

**7. T. -H. Chang*, M. Hong*, H.-T. Wai*, X. Zhang and S, Lu, "Distributed learning in the non-convex world: From batch to streaming data and beyond," accepted by IEEE Signal Process. Mag., 2020 (* equal contribution)**

6. M. Hong and T. -H. Chang, “ Stochastic Proximal Gradient Consensus Over Random Networks," *IEEE Trans. Signal Process*., vol. 65, no. 11, pp. 2933-2948, June 2017.

5. T.-H. Chang," A proximal dual consensus ADMM method for multi-agent constrained optimization ", *IEEE Trans. Signal Process.*, vol. 64, no. 14, pp. 3719-3734, July 2016.

4. **T.-H. Chang**, W.-C. Liao, M. Hong and X. Wang," Asynchronous Distributed ADMM for Large-Scale Optimization PartII: Linear Convergence Analysis and Numerical Performance ", *IEEE Trans. **Signal Process.,* vol. 64, no. 12, pp. 3131-3144, June 2016.

**3. T.-H. Chang**, M. Hong, W.-C. Liao and X. Wang," Asynchronous Distributed ADMM for Large-Scale Optimization- Part I: Algorithm and Convergence Analysis,”* IEEE Trans. Signal Process.*, vol. 64, no. 12, pp. 3118-3130, June 2016.

2. **T.-H. Chang**, M. Hong and X. Wang," Multi-agent distributed optimization via inexact consensus ADMM ”, *IEEE Trans. Signal Process.*, vol. 63, no. 2, pp. 482-497, Jan. 2015.

1. **T.-H. Chang**, A. Nedich, and A. Scaglione," Distributed constrained optimization by consensus-based primal-dual perturbation method ”, *IEEE Trans. Automatic Control*, vol. 59, no. 6, pp. 1524-1538, June 2014.

**(2) UAV Communications**

3. L. Li, **T.-H. Chang** and S. Cai, "UAV Positioning and Power Control for Two-Way Wireless Relaying," *IEEE Trans. Wireless Commun.*, vol. 19, no. 2, 1008-1024, Feb. 2020.

2. C. Shen, **T.-H. Chang**, J. Gong, Y. Zeng and R. Zhang," Multi-UAV Interference Coordiation via Joint Trajectory and Power Control," *IEEE Trans. Signal Process.,* vol. 68, pp. 843-858, Jan. 2020

1. Jie Gong, T. -H. Chang, Chao Shen and Xiang Chen, “ Flight Time Minimization of UAV for Data Collection over Wireless Sensor Networks," *IEEE J. Sel. Area Commun.* , vol. 36, no. 10, 1-13, Oct. 2018.

**(3) Transmit Beamforming Optimization**

1. T.-H. Chang, Y.-F. Liu and S.-C. Lin, “ QoS-Based Linear Transceiver Optimization for Full Duplex Multi-User Communications,” *IEEE Trans. Signal Process., *vol. 66, no. 9, pp. 2300-2313, May. 2018.

2. K.-Y. Wang, A. M.-C. So, T.-H. Chang, W.-K. Ma and C.-Y. Chi*," *Outage constrained robust transmit optimization for multiuser MISO downlinks: Tractable approximations by conic optimization ", *IEEE Trans. Signal Process.*, vol. 62, no. 21, pp. 5690-5705, Nov. 2014. (**2018 IEEE SPS Best Paper Award,** **ESI Highly Cited Paper**)

3. W.-C.Li, **T.-H. Chang**, Che Lin and C.-Y.Chi," Coordinated beamforming for multiuser MISO interference channel under rate outage constraints ", *IEEE Trans. Signal Process.*, vol. 61, no. 5, pp. 1087-1103, March 2013.

4. C. Shen, T. -H. Chang, K. -Y. Wang, Zhengding Qiu and C. -Y. Chi, " Distributed robust multicell coordinated beamforming with imperfect CSI: An ADMM approach," *IEEE Trans. Signal Process. *, vol. 60. no. 6, pp. 2988-3003, June 2012.

5. **T.-H. Chang**, Z.-Q. Luo and C.-Y. Chi," Approximation bounds for semidefinite relaxation of Max-Min-Fair multicast transmit beamforming problem ", *IEEE Trans. Signal Process.*, vol. 56, no. 8, pp. 3932-3943, August 2008.

**(4) Physical-Layer Security**

1. W.-C. Liao, **T.-H. Chang**, W.-K. Ma, and C.-Y. Chi," QoS-based transmit beamforming in the presence of eavesdroppers: Anoptimized artificial-noise-aided approach ", *IEEETrans. Signal Process.*, vol. 59, no. 3, pp. 1202-1216, March 2011. (**ESI Highly Cited Paper**)

2. **T.-H. Chang**, W.-C. Chiang, Y.-W. Peter Hong, and C.-Y. Chi," Training sequence design for discriminatory channel estimation in wireless MIMO systems ", *IEEE Trans. Signal Process.*, vol. 58, no. 12, pp. 6223-6237, Dec. 2010.

**(5) Smart Grid Control**

1. S.-C. Tsai, Y.-H. Tseng and **T.-H. Chang**, " Communication-efficient distributed demand response: A randomized ADMM approach,” *IEEE Trans. Smart Grid*, vol. 8, no. 3, pp. 10851095, May 2017.

2. **T.-H. Chang**, M. Alizadeh, and A. Scaglione," Real-time power balancing via decentralized coordinated home energy scheduling ", *IEEE Trans. Smart Grid*, vol. 4, no. 3, pp. 1490-1504, Sept. 2013.

Book Chapters

5. W. -S. Lai, **T.-H. Chang**, T.-S. Lee and K.- H. Yeh, " Dynamic Enhanced Inter-cell
Interference Coordination Strategy with Quality of Service Guarantees for
Heterogeneous Networks," Chapter 6 in *Backhauling/Fronthauling for Future
Wireless Systems*, Editors: Kazi Mohammed, Saidul Huq and Jonathan Rodriquez,
Wiley, 2016.

4. W. -S . Lai, **T.-H. Chang**** **and T.-S. Lee, " Distributed Dynamic Resource
Allocation for OFDMA -Based Cognitive Small Cell Networks Using a
Regret-Matching Game Approach," Chapter 9 in *Game Theory Framework
Applied to Wireless Communication Networks*, Editors: Chunguang Yang and
Jiandong Li, Publisher, IGI Global, 2015.

3. Y. -W. Peter Hong and **T. -H. Chang**, " Discriminatory Channel
Estimation for Secure Wireless Communication," in *Physical Layer Security in
Wireless Communications*, Editors: Sean Zhou, LingyangSong, and Yan Zhang, Publisher:
Auerbach Publications, CRC Press, Taylor & Francis Group, 2013.

2. Yin Sun, X. Zhong, **T. -H. Chang**, S. Zhou, J. Wang, and C.- Y. Chi, " Spectrum Sharing Between
Dynamic Ad-Hoc and Cooperative Relay Networks," Chapter 15 in *Dynamic Ad-hoc Networks*, Edited by Habib. F. Rashvand and Han-Chieh Chao,
Institution of Engineering and Technology (IET), 2013.

1. Z. -Q. Luo and **T.-H. Chang****, " SDP relaxation of homogeneous
quadratic optimization: Approximation bounds and applications," Chapter 4
(pp. 117-165) in ***Convex Optimization in Signal Processing and Communications*,
Edited by D. P. Palomar and Y. Eldar, Cambridge, UK: Cambridge University
Press, April 2010.

Journal Paper

**52. T. -H. Chang*, M. Hong*, H.-T. Wai*, X. Zhang and S, Lu, "Distributed learning in the non-convex world: From batch to streaming data and beyond,****" accepted by IEEE Signal Process. Mag., 2020 (* equal contribution)**

**51. S. Wang, T. -H. Chang, Y. Cui and J.-S. Pang, "Clustering by orthogonal NMF and non-convex penalty optimization,****" submitted for publication.**

50. K.-M. Chen, **T.-H. Chang**, K.-C. Wang and T.-S. Lee, "Machine learning based automatic diagnosis in mobile communication networks," *IEEE Trans. Vehicular Tech.*, vol. 68, no. 10, 10081-10093, Oct. 2019

49. L. Li, **T.-H. Chang** and S. Cai, "UAV Positioning and Power Control for Two-Way Wireless Relaying," *IEEE Trans. Wireless Commun*., vol. 19, no. 2, 1008-1024, Feb. 2020.

48. Q. Shi, M. Hong, X. Fu and **T.-H. Chang**, "Penalty Dual Decomposition Method For Nonsmooth Nonconvex Optimization: Part II," submitted for publication.

47. C. Shen, **T.-H. Chang**, J. Gong, Y. Zeng and R. Zhang," Multi-UAV Interference Coordination via Joint Trajectory and Power Control,"* **IEEE Trans. Signal Process.*, vol. 68, pp. 843-858, Jan. 2020

46. Yanqing Xu, Chao Shen, **T. -H. Chang**, Shih-Chun Lin, Yajun Zhao, Gang Zhu, “Transmission Energy Minimization for Heterogeneous Low-Latency NOMA Downlink," *IEEE Trans. Wireless Commun., vol. 19, no. 2, 1054-1069, Feb. 2020*

45. Xiaozhou Zhang, **T. -H. Chang**, Ya-Feng Liu, Chao Shen and Gan Zhu, “ Max-Min Fairness User Scheduling and Power Allocation in Full-Duplex OFDMA Systems," *IEEE Trans. Wireless Commun.*, *vol. 18, no. 6, pp. 3078-3092, June 2019*

44. M. Hong, T. -H. Chang, X. Wang, M. Razaviyayn, S. Ma and Z. -Q. Luo, “ A Block Successive Upper Bound Minimization Method of Multipliers for Linearly Constrained Convex Optimization," accepted by *Mathematics of Operations Research. *

43. Ying Cui, **T. -H. Chang**, Mingyi Hong and
Jong-Shi Pang, “ A Study of Piecewise LinearQuadratic Programs," submitted for publication.

42. Jianhua Tang, Tony Q. S. Quek, **T. -H. Chang**, and Byonghyo Shim, “ Systematic Resource Allocation in Cloud RAN with Caching as a Service under Two Timescale," *IEEE Trans. Commun.*, vol. 67, no. 11, pp. 7755-7770, Nov. 2019

41. Jie Gong, **T. -H. Chang**, Chao Shen and Xiang Chen, “ Flight Time Minimization of UAV for Data Collection over Wireless Sensor Networks," *IEEE J. Sel. Area Commun. *, vol. 36, no. 10, 1-13, Oct. 2018.

40. **T. -H. Chang**, Y.-F. Liu and S. -C. Lin, “ QoS-Based Linear Transceiver Optimization for Full-Duplex Multiuser Communications," *IEEE Trans. Signal Process.*, vol. 66, no. 9, pp. 2300-2313, May. 2018.

39. N. Zhang, Y.- F. Liu, H. Farmanbar,**T. -H. Chang**, M. Hong, and Z. -Q. Luo, “ Network Slicing for Service-Oriented Networks Under Resource Constraints," *IEEE J. Sel. Area Commun. (JSAC)*, vol. 35. , no. 11, pp. 2512-2521, Nov. 2017.

38. Q. Chen, D. Kang, Y. He, **T.-H. Chang**, and Y. - F. Liu, “ Joint Power and Admission Control based on Channel Distribution Information: A Novel Two-Time-Scale Approach," *IEEE Signal Processing Letters,* vol. 24, no. 2, pp. 196-201, Feb. 2017.

37. M. Hong and** T. -H. Chang**, “ Stochastic Proximal Gradient Consensus Over Random Networks," *IEEE Trans. Signal Process*. , vol. 65, no. 11, pp. 2933-2948, June 2017.

36. W. -K. Ma, Jianxian Pan, Anthony M. -C. So and **T. -H. Chang**, " Unraveling the Rank-One Solution Mystery of Robust MISO Downlink Transmit Optimization: A Verifiable Sufficient Condition via a New Duality Result," *IEEE Trans. Signal Process*. , vol. 65, no. 7, pp. 19091924, April 2017.

35. S. -C. Tsai, Y.-H. Tseng and **T. -H. Chang**, " Communication-efficient distributed demand response: A randomized ADMM approach," *IEEE Trans. Smart Grid, *vol. 8, no. 3, pp. 1085-1095, May 2017.

34. S. Xu, **T. -H. Chang**, S. -C. Lin, C. Shen and G. Zhu, “ Energy-efficient packet scheduling with finite blocklength codes: Convexity analysis and efficient algorithms," *IEEE Trans. Wireless Commun*. , vol. 15, no. 8, pp. 5527-5540, Aug. 2016.

33. **T. -H. Chang**, " A proximal dual consensus ADMM method for multi-agent constrained optimization," *IEEE Trans. Signal Process*. , vol. 64, no. 14, pp. 3719-3734, July 2016.

32. **T. -H. Chang**, W.-C. Liao, M. Hong and X. Wang, " Asynchronous Distributed ADMM for Large-Scale Optimization- PartII: Linear Convergence Analysis and Numerical Performance," *IEEE Trans. Signal Process. *, vol. 64, no. 12, pp. 3131-3144, June 2016.

31. **T. -H. Chang**, M. Hong, W. -C. Liao and X. Wang, " Asynchronous Distributed ADMM for Large-Scale Optimization- Part I: Algorithm and Convergence Analysis," *IEEE Trans. Signal Process. *, vol. 64, no. 12, pp. 3118-3130, June 2016.

30. W. -S. Lai, **T. -H. Chang**, and T. -S. Lee, " Joint Power and Admission Control for Spectral and Energy Efficiency Maximization in OFDMA-Based Heterogeneous Networks," *IEEE Trans. Wireless Commun. *, vol. 15, no. 5, pp. 3521-3547, May 2016.

29. Y.-W. Peter Hong, W. -C. Li,**T.- H. Chang** and C. -H. Lee, " Coordinated multicasting with opportunistic user selection in multicell wireless systems," *IEEE Trans. Signal Process. *, vol. 63, no. 13, pp. 3506-3521, July 2015.

28. W. -C. Li, **T. -H. Chang**, and C.- Y. Chi, " Multicell Coordinated Beamforming with Rate Outage Constraint Part I- Complexity Analysis," *IEEE Trans. Signal Process. *, vol. 63, no. 11, pp. 2749-2762, June 2015.

27. W. -C. Li, **T. -H. Chang**, and C. -Y. Chi, " Multicell Coordinated Beamforming with Rate Outage Constraint Part II- Efficient Approximation Algorithms," *IEEE Trans. Signal Process*. , vol. 63, no. 11, pp. 2763-2778, June 2015.

26. Y. Yang, **T. -H. Chang**, Meilu Lin, Jianhua Ge and Yangheng Ji, " Efficient solutions to distributed beamforming for two-way relay network sunder individual relay power constraints," *IEEE Trans. Vehicular Tech*. , vol. 64, no. 4, pp. 1643-1649, April 2015.

25. **T. -H. Chang**, M. Hong and X. Wang, " Multi-agent distributed optimization via inexact consensus ADMM," *IEEE Trans. Signal Process. *, vol. 63, no. 2, pp. 482-497, Jan. 2015.

24. C. Shen, W. -C. Li and **T. -H. Chang**, " Wireless information and energy transfer in multiantenna interference channel," *IEEE Trans. Signal Process. *, vol. 62, no. 23, pp. 6249-6264, Dec. 2014.

23. Q. Shi, W. Xu, **T. -H. Chang**, Y. Wang and E. Song, " Joint beamforming and power splitting for MISO interference channel with SWIPT: An SOCP relaxation and decentralized algorithm," *IEEE Trans. Signal Process. *, vol. 62, no. 23, pp. 6194-6208, Dec. 2014.

22. K. -Y. Wang, A. M.-C. So, **T. -H. Chang**, W. -K. Ma and C. -Y. Chi, " Outage constrained robust transmit optimization for multiuser MISO downlinks: Tractable approximations by conic optimization," *IEEE Trans. Signal Process. *, vol. 62, no. 21, pp. 5690-5705, Nov. 2014.

**(2018 IEEE SPS Best Paper Award, ESI Highly Cited Paper) **

21. **T. -H. Chang**, A. Nedich, and A. Scaglione, " Distributed constrained optimization by consensus-based primal-dual perturbation method," *IEEE Trans. Automatic Control*, vol. 59, no. 6, pp. 1524-1538, Jun. 2014.

20. X. Li, A. Scaglione and **T. -H. Chang**, " A Framework for Phasor Measurement Placement in Hybrid State Estimation Via GaussNewton," *IEEE Trans. Power Systems*, vol. 29, no. 2, pp. 824-832, Mar. 2014.

19. S. -H. Wu, L. -K. Chiu, K. -Y. Lin and **T. -H. Chang**, " Robust hybrid beamforming with phased antenna arrays for downlink SDMA in indoor 60 GHz channels," *IEEE Trans. Wireless Commun*. , vol. 12, no. 9, pp. 4542-4557, Sept. 2013.

18. **T. -H. Chang**, M. Alizadeh, and A. Scaglione, " Real-time power balancing via decentralized coordinated home energy scheduling," *IEEE Trans. Smart Grid*, vol. 4, no. 3, pp. 1490-1504, Sept. 2013.

17. H. Qin, Yi Sun, **T. -H. Chang**, X. Chen, C.-Y. Chi, M. Zhao and J. Wang, " Power allocation and time-domain artificial noise design for wiretap OFDM with discrete inputs," *IEEE Trans. Wireless Commun*. , vol. 12, no. 6, pp. 2717-2729, June 2013.

16. C.-W. Huang, **T.-H. Chang**, X. Zhou, and Y.-W. Peter Hong, " Two-way training for discriminatory channel estimation in wireless MIMO systems," *IEEE Trans. Signal Process*. , vol. 61, no. 10, 2724-2738, May 2013.

15. W. -C. Li, **T. -H. Chang**, Che Lin and C.- Y. Chi, " Coordinated beamforming for multiuse rMISO interference channel under rate outage constraints," *IEEE Trans. Signal Process. *, vol. 61, no. 5, pp. 1087-1103, March 2013.

14. Y. Yang, **T. - H. Chang**, W. - K. Ma, J. Ge, C.- Y. Chi, and P. C. Ching, " Noncoherent bit interleaved coded OSTBC-OFDM with maximum spatial-frequency diversity," *IEEE Trans. Wireless Commun. *, vol. 11, no. 9, pp. 3335-3347 , Sept. 2012.

13. **T. -H. Chang**, W. -K. Ma, C. -Y. Huang and C. -Y. Chi, " Noncoherent OSTBC-OFDM for MIMO and cooperative communications: Perfect channel identifiability and achievable diversity order," *IEEE Trans. Signal Process. *, vol. 60, no. 9, pp. 4849-4863 , Sept. 2012.

12. C. Shen, **T. -H. Chang**, K. -Y. Wang, Zhengding Qiu and C. -Y. Chi, " Distributed robust multicell coordinated beamforming with imperfect CSI: An ADMM approach," *IEEE Trans. Signal Process. *, vol. 60. no. 6, pp. 2988-3003, June 2012.

11. Y. Sun, X. Zhong, **T. -H. Chang**, S. Zhou, J. Wang, and C. Y. Chi, " Optimal real-time transmission control for spectrum sharing between cooperative relay and Ad hoc networks," *IEEE Trans. Signal Process. *, vol. 60, no. 4, pp. 1971-1985, April 2012.

10. S. -C. Lin, **T. -H. Chang**, Y. -L. Liang, Y. -W. Peter Hong, and C. -Y. Chi, " On the impact of quantized channel feedback in guaranteeing secrecy with artificial noise: The noise leakage problem," *IEEE Trans. Wireless Commun*. , vol. 10, no. 3, pp. 901-915, March 2011.

9. W. -C. Liao, **T. -H. Chang**, W. -K. Ma, and C.-Y. Chi, " QoS-based transmit beamforming in the presence of eavesdroppers: An optimized artificial-noise-aided approach," *IEEETrans. Signal Process. *, vol. 59, no. 3, pp. 1202-1216, March 2011. **(ESI Highly Cited Paper)**

8. **T. -H. Chang**, W. -C. Chiang, Y. -W. Peter Hong, and C. -Y. Chi, " Training sequence design for discriminatory channel estimation in wireless MIMO systems," *IEEE Trans. Signal Process. *, vol. 58, no. 12, pp. 6223-6237, Dec. 2010.

7. **T. -H. Chang**, C. -W. Hsin, W. -K. Ma and C. Y. Chi, " A Linear Fractional Semidefinite Relaxation Approach to Maximum-Likelihood Detection of Higher-Order QAM OSTBC in Unknown Channels," *IEEETrans. Signal Process*., vol. 58, no. 4, pp. 2315-2326, April 2010,

6. W. -K. Ma, Chao-Chen Su, J. Jalden, **T. -H. Chang**, and C. -Y. Chi, " The equivalence of semidefinite relaxation MIMO detectors for higher-order QAM," *IEEE Journal of Selected Topicsin Signal Processing*, vol. 3, no. 6, pp. 1038-1052, Dec. 2009.

5. P. De, **T. -H. Chang**, and C. -Y. Chi," Linear prediction based semiblind channel estimation for multiuser OFDM with insufficient guard interval," *IEEE Trans. Wireless Commun*. , vol. 8, no. 12, pp. 5728-5736, Dec. 2009.

4. X. Chen, C.-Y. Chi, **T. -H. Chang**, and C. -W. Wong, " Non-cancellation multistage Kurtosis maximization with prewhitening for blind source separation," *EURASIP Journal on Advances in Signal Processing*, vol. 2009, ArticleI ID 534137, 13 pages, April 2009.

3. **T. -H. Chang**, Z.- Q. Luo and C. Y. Chi, " Approximation bounds for semidefinite relaxation of max-min-fair multicast transmit beamforming problem," *IEEE Trans. Signal Process. *, vol. 56, no. 8, pp. 3932-3943, August 2008.

2. **T. -H. Chang**, W. -K. Ma and C. -Y. Chi, " Maximum-likelihood detection of
orthogonal space-time block coded OFDM in unknown block fading channels," *IEEE Trans.
Signal Process. *, vol. 56, no. 4, pp.
1637-1649, April 2008.

1. **T. -H. Chang**, C. -Y. Chi and Y. -J. Chang," Space-time selective RAKE receiver with finger selection strategies for UWB overlay communications," *IEEE Trans. Microwave Theory and Techniques*, vol. 54, no. 4, pp. 1731-1744, April 2006.

Refereed Conference Proceedings

- 67. J. Zong, C. Shen, J. Cheng, J. Gong,
**T.-H. Chang**, L. Chen and B. Ai, "Flgiht time minimization via UAV's trajectory design for ground sensor data collection," ISWCS, Oulu, Finland, Aug. 27-30, 2019, pp. 255-259. - 66. S. Cai,
**T.-H. Chang**and H. Zhu "Joint symbol level precoding and receive beamforming for multiuser MIMO downlink," in Proc. IEEE SPAWC, Cannes, France, July 2-5, 2019, pp. 1-5 - 65. L. Li,
**T.-H. Chang**and S. Cai, "UAV positioning and power control for wireless two-way relaying," in Proc. IEEE SPAWC, Cannes, France, July 2-5, 2019, pp. 1-5

- 65. L. Li,
- 64. S. Wang,
**T.-H. Chang**, Y. Cui and J.-S. Pang, “Clustering by orthogonal non-negative matrix factorization: A sequential non-convex penalty approach,” in*Proc. IEEE ICASSP*, Brighton, UK, May 12-17, 2019, pp. 5576 – 5580. - 63. J. Tang, B. Shim,
**T.-H. Chang**and T. Q. S. Quek," Incorporating URLLC and Multicast eMBB in Sliced Cloud Radio Access Network ", in Proc.*IEEE ICC,*Shanghai, China, May 20-24, 2019, pp. 1-6. - 62. Nan Zhang, Ya-Feng Liu, Hamid Farmanbar, T. -H. Chang, Mingyi Hong, Zhi-Quan Luo, “ Software Defined Resource Allocation for Service-Oriented Networks ”, in
*Proc. IEEE ICASSP,*Calgory, Canada, April 15-20, 2018. - 61. Shuai Wang, Peng Wu, Manqi Zhou, T. -H. Chang, Song Wu, “ Cell Subclass Identification in Single-Cell RNA-Sequencing Data Using Orthogonal Non-negative Matrix Factorization ”, in
*Proc. IEEE ICASSP,*Calgory, Canada, April 15-20, 2018. - 60. Jinghong Tan, T. -H. Chang and Tony Quek, “ Minimum Energy Resource Allocation in Fog Radio Access Network with Fronthaul and Latency Constraints ”, in
*Proc. IEEE SPAWC,*Kalamata, Greece, June 25-28, 2018. - 59. Xiaofang Sun, Chao Shen, T.- H. Chang and Zhangdui Zhong, “ Joint Resource Allocation and Trajectory Design for UAV-Aided Wireless Physical Layer Security ”, in
*Proc. IEEE GLOBECOM,*Abu Dhabi, UAE, Dec. 9-13, 2018. - 58. Jie Gong, Jingjing Lin, T. -H. Chang，Chao Shen, Xiang Chen, “ Distributed Power Allocation for UAV-Assisted Multi- User Relay Networks ”, in
*Proc. International Symposium on Communication Systems, Networks, and Digital Signal Processing,*Budapest, Hungary, July 18-20, 2018. - 57. Chao Shen, T. -H. Chang, Hanqing Xu, and Yajun Zhao, “ Joint Uplink and Downlink Transmission Design for URLLC Using Finite Blocklength Codes ", in
*Proc. ISWCS,*Lisbon, Portugal, Aug. 27-30, 2018. - 56. Jie Gong, T. -H. Chang, Chao Shen and Xiang Chen, “ Aviation Time Minimization of UAV for Data Collection from Energy Constrained Sensor Networks ”, in
*Proc. IEEE WCNC,*2018. - 55. Y. Xu, S. Chao, T. -H. Chang, S. -C. Lin, Y. Zhao and G. Zhu, “ Energy-Efficient Non- Orthogo nal Transmission under Reliability and Finite Blocklength Constraints ”, to appear in
*IEEE GLOBECOM, Workshop on Ultra-Reliable Low-Latency Communications in Wireless Networks,*Singapore, Dec.4-8, 2017. - 54. T. -H. Chang, Y. - F. Liu and S. - C. Lin, “ Max- Min- Fairness Linear Transceiver Design for Full Duplex Multiuser Systems ”, in
*Proc. IEEE SPAWC, Hokkaido,*Japan, July 3-6, 2017. - 53. J. Tang, L. Teng, Tony Q. S. Quek, T. -H. Chang, and B. Shim, “ Exploring the Interactions of Communication, Computing and Caching in Cloud RAN under Two Timescale ”, in
*Proc. IEEE SPAWC, Hokkaido,*Japan, July 3-6, 2017. - 52. X. Zhang, T. -H. Chang, Y.-F. Liu, C. Shen and G. Zhu, “ Uplink and downlink user pairing in full-duplex multi-user systems: Complexity and algorithms ”, in
*Proc. IEEE ICASSP,*New Orleans, USA, March 3-8, 2017. - 51. C. -W. Wu and T. -H. Chang, “ ADMM Approach to Asynchronous Distributed Frequency Based Load Control ”, in
*Proc. IEEE GLOBALSIP,*Washington DC, USA, Dec 7-9, 2016. - 50. C. -H. Lee, T. -H. Chang and S. -C. Lin, “ Transmit- Receive Beamforming Optimization for Full-Duplex Cloud Radio Access Networks ”, in
*Proc. IEEE GLOBECOM,*Washington DC, USA, Dec 4-8, 2016. - 49. M. Hong and T. -H. Chang, “ Stochastic Proximal Gradient Consensus over time-varying networks ”, in Proc. IEEE ICASSP, Shanghai, China, March 20-25, 2016
- 48. Davood Hajinezhad, T. -H. Chang, X. Wang, Qinagjiang Shi, M. Hong, “ Nonnegative Matrix Factorization using ADMM: Algorithm and Convergence Analysis ”, in
*Proc. IEEE ICASSP*, Shanghai, China, March 20-25, 2016. - 47. T. -H. Chang, M. Hong, W. -C. Liao and X. Wang, “ Asynchronous Distributed Alternating Direction Method of Multipliers: Algorithm and Convergence Analysis ”, in
*Proc. IEEE ICASSP*, Shanghai, China, March 20-25, 2016. - 46. S. Xu, T. -H. Chang, Shi- Chun Lin, C. Shen and Gang Zhu, “ On the convexity of energyefficient packet scheduling problem with finite blocklength codes ”, in
*Proc. IEEE GLOBLECOM*, San Diego, CA, USA, Dec. 6-10, 2015. - 45. Hoi-To Wai, T. -H. Chang and A. Scaglione, “ A consensus-based decentralized algorithm for non-convex optimization with application to dictionary learning ”, in
*Proc. IEEE ICASSP*, Brisbane, Australia, April 19-24, 2015. - 44. T. -H. Chang, “ A randomized dual Consensus ADMM method for multi- agent distributed optimization ”, in
*Proc. IEEE ICASSP*, Brisbane, Australia, April 19-24, 2015. - 43. Yi-Hen Tseng and T. -H. Chang, “ Evaluating the impact of distributed solar powers on coordinated demand side management ”, in
*Proc. 1st IGBSG,*Taipei, Taiwan, April 23- 25, 2014. - 42. X. Wang, M. Hong, T. -H. Chang, M. Razaviyayn, Z. - Q. Luo, “ Joint day- ahead power procurement and load scheduling using stochastic alternating direction method of multipliers ”, in
*Proc. IEEE ICASSP*, Florence, Italy, May 4-9, 2014. - 41. M. Hong, T. -H. Chang, X. Wang, M. Razaviyayn, S. Ma and Z.- Q. Luo, “ A block coordinate decent method of multipliers: Convergence analysis and applications ”, in
*Proc. IEEE ICASSP*, Florence, Italy, May 4- 9, 2014. - 40. T. -H. Chang, M. Hong and X. Wang, “ Multi-agent distributed large-scale optimization by inexact consensus alternating direction method of multipliers ”, in
*Proc. IEEE ICASSP*, Florence, Italy, May 4-9, 2014. - 39. W. -C. Li, T. -H. Chang, and C.-Y. Chi, “ On the complexity of SINR outage constrained maxmin-fairness multicell coordinated beamforming problem ”, in
*Proc. IEEE ICASSP*, Florence, Italy, May 4-9, 2014. - 38. T. -H. Chang, A. Nedich and A. Scaglione, “ Distributed sparse regression by consensusbased primal-dual perturbation optimization ”, in
*Proc. IEEE Global Conf. on Signal and Info. Process. (GlobalSIP)*, Austin, Texas, Dec. 3-5, 2013. - 37. Xiao Li, A. Scaglione and T. -H. Chang, “ Optimal sensor placement for hybrid state estimation in smart grid ”, in
*Proc. IEEE ICASSP,*Vancouver, Canada, May 26-31, 2013. - 36. W. -C. Li, T. -H. Chang, Che Lin and C. -Y. Chi, “ Outage constrained weighted sum rate maximization for MISO interference channel by pricing based optimization ”, in
*Proc. IEEE ICASSP*, Vancouver, Canada, May 26-31, 2013. - 35. Ye Yang, T. -H. Chang, Jianhua Ge, W.-K. Ma and P. C. Ching, “ Achieving full cooperative and frequency diversity in bit-interleaved coed two-way relay networks ”, to appear in
*Proc. IEEE WCNC*, Shanghai, China, April 7-10, 2013. - 34. M. Alizadeh, T. -H. Chang, A. Scaglione, “ Marketing the demand flexibility of deferrable loads under a best-effort service model ”, in
*Proc. 46 th Hawaii Int’l conf. on system science (HICSS)*, Maui, Hawaii, USA, Jan. 7-10, 2013. - 33. Ye Yang, Jianhua Ge, T. -H. Chang and Yi Sun, “ Noncoherent amplify-and-forward cooperative OFDM in block fading channels ”, in
*Proc. IEEE WCSP*, Huangshan, Anhui, China, Oct. 25-27, 2012. - 32. M. Alizadeh, T. -H. Chang, A. Scaglione, “ Grid integration of distributed renewables through coordinated demand response ”, in
*Proc. IEEE Int. Conf. Decision and Control (CDC)*, Maui,Hawaii, USA, Dec. 10-13, 2012. - 31. C. Shen, W.-C. Li and T. -H. Chang, “ Simultaneous information and energy transfer: A twouser MISO interference channel case ”, in
*Proc. IEEE GLOBECOM,*Anaheim, CA, USA, Dec. 3-7, 2012. - 30. C. Shen, T. -H. Chang, K. -Y. Wang, Zhengding Qiu and C.-Y. Chi, “ Chance-constrained robust beamforming for multi-cell coordinated downlink ”, in
*Proc. IEEE GLOBECOM*, Anaheim, CA, USA, Dec. 3-7, 2012. - 29. T. -H. Chang, M. Alizadeh, and A. Scaglione, “ Coordinated home energy management for real-time power balancing ”, in
*Proc. IEEE Power & Energ Society (PES) General Meeting*, San Diego, CA, USA, July 22-26, 2012 (8 pages). - 28. M. Alizadeh, T. -H. Chang, A. Scaglione, Chen Chen and Shalinee Kishore, “ The emergence of deferrable energy requests and a greener future: What stands in the way ? ”, in
*Proc. Int. Symp. Commun. Control and Signal Process.*, Rome, Italy, May 2-4, 2012. - 27. Ta-Yuan Liu, S. -C. Lin, T. -H. Chang, Y.-W. Peter Hong, “ How much training is enough for secrecy beamforming with artificial noise ? ”, in Proc.
*IEEE ICC,**Ottawa*, Canada, June 10-15,2012. - 26. Kung-Yu Wang, T. -H. Chang, W.- K. Ma and C. -Y. Chi, “ Optimal transmission strategy for outage rate maximization in MISO fading channels with training ”, in
*Proc. IEEE ICASSP*, Kyoto, Japan, March 25-30, 2012. - 25. T. -H. Chang, W. -K. Ma and C. -Y. Chi, “ Worst-case robust multiuser transmit beamforming using semidefinite relaxation: Duality and Implications ”, in
*Proc. Asilomar Conference on Signals, systems, and Computers*,*Pacific Glove*, CA, USA, Nov. 6-9, 2011. - 24. C. -W. Huang, T. -H. Chang, X. Zhou, Y.-W. Peter Hong, “ Two-way discriminatory channel estimation for non-reciprocal wireless MIMO channels ”, in
*Proc. Asilomar Conference on Signals, systems, and Computers, Pacific Glove*, CA, USA, Nov. 6-9, 2011. - 23. W. -C. Li, T. -H. Chang, Che Lin and C. -Y. Chi, “ A convex approximation approach to weighted sum rate maximization of multiuser MISO interference channel under outage constraints ”, in
*Proc. IEEE ICASSP*, Prague, Czech, May 22-27, 2011. - 22. K. -Y. Wang, T. -H. Chang, W.-K. Ma, A. M.-C. So and C. -Y. Chi, “ Probabilistic SINR constrained robust transmit beamforming: A Bernstein-type inequality based conservative approach ”, in
*Proc. IEEE ICASSP*, Prague, Czech, May 22-27, 2011. - 21. C. -W. Huang, X. Zhou, T. -H. Chang, Y. -W. Peter Hong, “ Two-way training design for discriminatory channel estimation in wireless MIMO systems ”, in
*Proc. IEEE Int. Conf. Commun. (ICC),*Kyoto, Japan, June 5-9, 2011. - 20. C. Shen, K. -Y. Wang, T. -H. Chang, Zhengding Qiu, and C. -Y. Chi, “ Worst-case SINR constrained robust coordinated beamforming for multicell wireless systems ”, in
*Proc. IEEE Int. Conf. Commun. (ICC)*, Kyoto, Japan, June 5-9, 2011. - 19. T. -H. Chang, Wei-Cheng Chaing, Y. -W. Peter Hong, and C. -Y. Chi, “ Joint training and beamforming design for performance discrimination using artificial noise ”, in
*Proc. IEEE Int. Conf. Commun. (ICC)*, Kyoto, Japan, June 5-9, 2011. - 18. K. -Y. Wang, T. -H. Chang, W.-K. Ma, and C. -Y. Chi, “ A semidefinite relaxation based conservative approach to robust transmit beamforming with probabilistic SINR constraints ”, in
*Proc. European Signal Process. Conf. (EUSIPCO)*, Aalborg, Denmark, Aug. 23-27, 2010. - 17. W. -J. Huang, Y. -S. Wang, Y. -W. Peter Hong, and T. -H. Chang, “ Decentralized Reduced-Rank Multiuser Relaying for Cooperative Uplink CDMA Networks ”, in
*Proc. IEEE Vehicular Tech. Conf., Spring (VTC2010-Spring)*, Taipei, Taiwan, May 16-19, 2010. - 16. S. -C. Lin, T. -H. Chang, Yan-Liang Liang, Y.-W. Peter Hong and C.-Y. Chi, “ On the impact of quantized channel direction feedback in multiple-antenna wiretap channels ”, in
*Proc. IEEE Int. Conf. Commun. (ICC)*, Cape Town, South Africa, May 23-27, 2010. - 15. W. -C. Liao, T. -H. Chang, W. -K. Ma and C.-Y. Chi, “ Joint transmit beamforming and artificial noise design for QoS discrimination in wireless downlink ”, in
*Proc. IEEE International Conf. on Acoustics, Speech and Signal Process. (ICASSP)*, Dallas, Texas, USA, March 14-19, 2010, pp. 2562-2565. - 14. T. -H. Chang, Y.-W. Peter Hong, and C.-Y. Chi, “ Training signal design for discriminatory channel estimation ”, to appear in
*Proc. IEEE Global Commun Conf. (GLOBECOM)*, Honolulu, Hawaii, USA, Nov. 30- Dec. 4, 2009, pp. 1-6. - 13. J. Du, C.-Y. Chi, T. -H. Chang and J. Liu, “ Parallel blind source separation by Kurtosis maximization with successive prewhitening ”, in
*Proc. Int. Conf. on Wireless Commun. & Signal Process. (WCSP)*, Nanjing, China, Nov. 13- 15, 2009, pp. 1-5. - 12. T. -H. Chang, W.-K. Ma, Chao-Yi Kuo, and C.-Y. Chi, “ Blind maximum-likelihood detection for decode-and-forward randomized distributed OSTBC ”, in
*Proc. IEEE Int. Workshop Signal Process. Adv. in Wireless Commun. (SPAWC)*, Perugia, Italy, June 21-24, 2009, pp. 260-264. - 11. Y. -L. Liang, Y.-S. Wang, T. -H. Chang, Y. -W. Peter Hong, and C. -Y. Chi, “ On the impact of quantized channel feedback in guaranteeing secrecy with artificial noise ”, in
*Proc. IEEE Int. Symp. Inform. Theory (ISIT),*Seoul, Korea, June 28-July 3, 2009, pp. 2351-2355. - 10. T. -H. Chang, W. -K. Ma, C. -Y. Huang and C. -Y. Chi, “ On perfect channel identifiability of semiblind ML detection of orthogonal space-time block coded OFDM ”, in Proc. IEEE International Conf. on Acoustics, Speech and Signal Process. (ICASSP), Taipei, Taiwan, April 19-24, 2009, pp. 2713-2716.
- 9. T. -H. Chang, Z. -Q. Luo, Xiaoping Wu, C. Akgun, J. Vaughan, K Ugurbil and P. -F. Van de Moortele, “ Transmit B1 shimming at high field with SAR constraints: A two stage optimization method Independent of the Initial set of RF phases and amplitudes ”, in
*Proc. 16th Int. Society for Magnetic Resonance in Medicine (ISMRM)*, Toronto, Ontario, Canada, May 3-9, 2008. - 8. Xiaoping Wu, T. -H. Chang, Z. -Q. Luo, C. Akgun, J. Vaughan, K. Ugurbil and P. -F. Van de Moortele, “ Worst case SAR scenario as a new metric for SAR analysis in B1 phase shim ”, in
*Proc. 16th ISMRM*, Toronto, Ontario, Canada, May 3-9, 2008. - 7. Chien-Wei Hsin, T. -H. Chang, W. -K. Ma and C. -Y. Chi, “ A linear fractional semidefinite relaxed ML approach for blind detection of 16-QAM orthogonal space time block codes ”, in
*Proc. IEEE Int. Conf. Commun. (ICC)*, Beijing, China, May 19-23, 2008, pp. 790-794. - 6. T. -H. Chang, Z. -Q. Luo, Li Deng and C. -Y. Chi, “ A convex optimization method for joint mean and variance parameter estimation of large-margin CDHMM ”, in
*Proc. IEEE International Conf. on Acoustics, Speech and Signal Process. (ICASSP)*, Las Vegas, Nevada, USA, March 30-April 4, 2008, pp. 4053-4056. - 5. T. -H. Chang, Z. -Q. Luo and C. -Y. Chi, “ Approximation bound for semidefinite relaxation based multicast transmit beamforming ”，in
*Proc. IEEE Int. Workshop.on Computational Advances in Multi-sensor Adaptive Processing (CAMSAP)*, St. Thomas, U.S. Virgin Islands, Dec. 12-14, 2007, pp. 193-196. - 4. T. -H. Chang, W. -K. Ma and C. -Y. Chi, “ Semiblind ML OSTBC-OFDM detection in block fading channels ”, in
*Proc. IEEE International Conf. on Acoustics, Speech and Signal Process. (ICASSP)*, Honolulu, Hawaii, USA, April 15-20, 2007, pp.III-309-312. - 3. T. -H. Chang, W. -K. Ma and C. -Y. Chi, “ Group-wise blind OFDM ML detection for complexity reduction ”, in
*Proc. 14th European Signal Processing Conference (EUSIPCO),*Florence, Italy, Sept. 4-8, 2006. - 2. T. -H. Chang, Yu-Jung Chang, Chun-Hsien Peng, Yu-Hang Lin and C.-Y. Chi, “ Space time MSINR-SRAKE receiver with finger assignment strategies in UWB multipath channels ”, in
*Proc. IEEE Int. Conf. on UWB*, Zurich, Switzerland, Sept. 5-8, 2005. - 1. Chun-Hsien Peng, Chia-Chin Lin, T. -H. Chang and C. -Y. Chi, “ Turbo space-time receiver by kurtosis maximization for CCIISI reduction in cellular wireless communications ”, in
*Proc. IEEE Int. Workshop on Computational Advances in Multi-sensor Adaptive Processing (CAMSAP)*, Puerto Vallarta, Mexico, Dec. 13-15, 2005.

- 61. Shuai Wang, Peng Wu, Manqi Zhou, T. -H. Chang, Song Wu, “ Cell Subclass Identification in Single-Cell RNA-Sequencing Data Using Orthogonal Non-negative Matrix Factorization ”, in