Tsung-Hsien Liu received his B.S. from National Taiwan University, Taiwan, in 1988, and Ph.D. from the University of Southern California, Los Angeles, USA, in 1998, both in electrical engineering.  He joined the Department of Communications Engineering, National Chung Cheng University, Chiayi, Taiwan, in August 1999, where he is now a professor. He also served as the chairperson for the Tainan Chapter, IEEE Communication Society, from 2018 to 2019. His research interests lie in the application of statistical signal processing techniques to wireless communications, with emphasis on developing fast implementation algorithms, designing baseband hardware architectures, and analyzing statistical performance for the multiple antenna baseband receivers.

Contact Information

Address: Department of Communications Engineering, 

                National Chung Cheng University 

           168 University Rd., Min-Shiung, Chiayi, Taiwan, R.O.C.

Phone: +886-5-2720411 ext. 33539

Email: comtsliu@ccu.edu.tw

Courses that I teach

Undergraduate level: Principles of Communications

Graduate level: Detection and Estimation, Orthogonal Frequency Division Multiplexing Technique, Simulation of Communication Systems

Publications

• Journal Papers

1.  T.-H. Liu and Z.-C. Chen, “Fast two-stage Max-Log MAP detection schemes for the soft-input soft-output detection of coded generalized spatial modulation signals,” accepted by IEEE Trans. Wireless Commun., Dec. 2023.

2.  T.-H. Liu, P.-Y. Chen, A.-H. Li, Y.-Y. Fang, R.-S. Lin, and Y.-S. Chu, “ASIC design and implementation of the real-time collision detection for machine tool automation,” vol. 11, pp. 21192-21198, IEEE Access, 2023.

3.  T.-H. Liu, J.-Z. Chi, B.-L. Wu, Y.-S. Chen, C.-H. Huang, Y.-S. Chu, “Design and implementation of machine tool life inspection system based on sound sensing,” Sensors, vol. 23, 284, 2023.

4. T.-H. Liu, T.-X. Jiang, C.-C. Chung, and Y.-S. Chu, “A maximum logarithmic maximum a posteriori probability based soft-input soft-output detector for the coded spatial modulation systems,” IEEE Trans. Circuits and Systems I: Regular Papers, vol. 69, no. 9, pp. 3816-3828, Sept. 2022.

5.  T.-H. Liu, S.-L. Wang, Y.-J. Lin, Y.-T. Hwang, C.-E. Chen, and Y.-S. Chu, “Fixed-complexity tree search schemes for detecting generalized spatially modulated signals: algorithms and hardware architectures,” IEEE Trans. Circuits and Systems I: Regular Papers, vol. 68, no. 2, pp. 904-917, Feb. 2021.  

6.  T.-H. Liu, Y.-Z. Ye, C.-K. Huang, C.-E. Chen, Y.-T. Hwang, and Y.-S. Chu, “A low-complexity maximum likelihood detector for the spatially modulated signals: algorithm and hardware implementation,” IEEE Trans. Circuits and Systems II: Express Briefs, vol. 66, no. 11, pp. 1820-1824, Nov. 2019.

7.  C.-H. Tseng, T.-H. Liu, Y.-C. Lin, and Y.-S. Chu, “Hardware implementation of the joint precoding sub-system and MIMO detection preprocessor in IEEE 802.11n/ac WLAN,” Journal of Signal Processing Systems, vol. 91, no.8, pp 875-884, Aug. 2019. 

8.  T.-H. Liu, C.-E. Chen, and C.-H. Liu, “Fast maximum likelihood detection of the generalized spatially modulated signals using successive sphere decoding algorithms,” IEEE Commun. Letters, vol. 23, no. 4, pp. 656-659, Apr. 2019. 

9.  T.-H. Liu, Y.-K. Ko, Y.-J. Chiu, W.-Y. Lin, and Y.-S. Chu, ”Hardware implementation of the preprocessing QR-decomposition for the soft-output MIMO detection with multiple tree traversals,” IEEE Trans. Circuits and Systems II: Express Briefs, vol. 65, no. 2, pp. 186-190, Feb. 2018. 

10.  T.-H. Liu, Y.-J. Chen, Y.-K. Ko, Y.-C. Lin, and Y.-S. Chu, “Hardware implementation of the compressed beamforming weights calculation for the practical wireless MIMO-OFDM communication system,” IEEE Trans. Circuits and Systems II: Express Briefs, vol. 65, no. 1, pp. 46-50, Jan. 2018. 

11.  C.-P. Chou, T.-H. Liu, and C.-H. Wu, “Robust training symbol assisted least squares estimation for direct conversion receivers with oscillator IQ-imbalance,” Wireless Personal Communications, vol. 95, no. 2, pp.1397-1406, July 2017.

12.  T.-H. Liu, “Analysis of the Alamouti STBC MIMO system with spatial division multiplexing over the Rayleigh fading channel,” IEEE Trans. Wireless Commun., vol. 14, no. 9, pp. 5156-5170, Sept. 2015.

13. T.-H. Liu, C.-N. Chiu, P.-Y. Liu, and Y.-S. Chu, “Block-wise QR-decomposition for the layered and hybrid Alamouti STBC MIMO systems: algorithms and hardware architectures,” IEEE Trans. Signal Process., vol. 62, no. 18, pp. 4737-4747, Sept. 2014.

14. T.-H. Liu and C.-N. Chiu, “On fast preprocessing schemes for the real-valued spatially multiplexed MIMO detectors,” Int. Journal Commun. Systems, vol. 27, no. 2, pp. 357–376, Feb. 2014.

15. T.-H. Liu, “Comparisons of two real-valued MIMO signal models and their associated ZF-SIC detectors over the Rayleigh fading channel,” IEEE Trans. Wireless Commun., vol. 12, no. 12, pp. 6054-6066, Dec. 2013.

16. T.-H. Liu, C.-N. Chiu, and C.-Y. Lin , “Fast codeword selection for limited feedback beamforming MIMO systems using breadth-first tree search,” IET-Commun., vol. 7, no. 6, pp. 531-537, June 2013.

17. M.-S. Shiu and T.-H. Liu, “Practical signal recovery of WLAN OFDM signals in the presence of IQ imbalance, phase noise, and unknown channel frequency response,” Wireless Personal Communications, vol. 68, no. 3, pp. 779-788, Feb. 2013.

18. T.-H. Liu, “Two efficient and stable MMSE detection algorithms for the V-BLAST system,” Int. Journal of Commun. Systems, vol. 26, no. 2, pp. 236-249, Feb. 2013.

19. W.-Y. Lin, C.-R. Tsai, and T.-H. Liu, “Computationally-efficient complex QR-decomposition architecture design for MIMO detection,” Int. Journal Electrical Eng., vol. 18, no. 5, pp. 197-208, Oct. 2011.

20. T.-H. Liu, J.-Y. Jiang, and Y.-S. Chu, “A low-cost MMSE-SIC detector for the MIMO system: algorithm and hardware implementation,” IEEE Trans. Circuits and Systems II: Express Brief, vol. 58, no. 1, pp. 56-61, Jan. 2011.

21. T.-H. Liu, “Some results for the fast MMSE-SIC detection in spatially multiplexed MIMO systems,” IEEE Trans. Wireless Commun., vol. 8, no. 11, pp. 5443-5448, Nov. 2009.

22. T.-H. Liu and Y.-L. Yeh Liu, “Modified fast recursive algorithm for efficient MMSE-SIC detection of the V-BLAST system,” IEEE Trans. Wireless Commun., vol. 7, no. 10, pp. 3713-3717, Oct. 2008.

23. T.-H. Liu, “Analysis of the principal component combining with weight estimation for DPSK signals,” IEEE Trans. Wireless Commun., vol. 6. no. 3, pp. 822-826, Mar. 2007.

24. T.-H. Liu, Y.-C. Li, and C.-C. Chang, “Comparisons of three blind channel estimation methods for CDMA systems from array signal processing perspectives,” European Trans. Telecommun., vol. 17, no. 4, pp. 461-471, July/Aug. 2006.

25. C.-Y. Chang and T.-H. Liu, “Comparisons of two clipping structures for efficient PAPR reduction in the IEEE 802.11a system,” Int. Journal Electrical Eng., vol. 13, no. 2, pp. 193-198, Feb. 2006.

26. T.-H. Liu, “Principal component combining with differential detection for DPSK signals over Rayleigh fading channels,” IEE Proc. Commun., vol. 152, no. 6, pp. 1015-1020, Dec. 2005.

27. T.-H. Liu, “Decision-feedback multiuser detection with orthogonal feedforward transformation,” IEEE Trans. Vehic. Technol., vol. 53, no. 5, pp. 1370-1378, Sept. 2004.

28. T.-H. Liu, “Linearly constrained minimum variance filters for blind multiuser detection,” IEEE Trans. Commun., vol. 51, no. 10, pp. 1649-1652, Oct. 2003.

29. T.-H. Liu and J. M. Mendel, “A subspace-based direction finding algorithm using fractional lower-order statistics,” IEEE Trans. Signal Process., vol. 49, no. 8, pp. 1605-1613, Aug. 2001.

30. T.-H. Liu and J. M. Mendel, “Cumulant-based subspace tracking,” Signal Process., vol. 76, no. 3, pp. 237-252, Aug. 1999.

31. T.-H. Liu and J. M. Mendel, “Gradient-based implementation of virtual-ESPRIT algorithm for target tracking,” Applied Signal Process., vol. 6, no. 3, pp. 144-154, 1999.

32. T.-H. Liu and J. M. Mendel, “Application of cumulants to array signal processing, Part V: sensitivity issues,” IEEE Trans. Signal Process., vol. 47, no. 3, pp. 746-759, Mar. 1999.

33. T.-H. Liu and J. M. Mendel, “Azimuth and elevation direction finding using arbitrary array geometries,” IEEE Trans. Signal Process., vol. 46, no. 7, pp. 2061-2065, July 1998.

• Conference Papers

• 1. T.-H. Liu, J.-Y. Wu, and Y.-S. Chu, “Parallel tree traversals for soft-output MIMO detection using multiple bit flippings,” in Proc. IEEE VTC 2019-Spring, Apr. May, 2019, pp. 1-5. 

  2.  C.-H. Chung, T.-H. Liu, and Y.-S. Chu, “Implementation of the precoder matrix indicator selection using MMSE trace criterion for the downlink transmission in 3GPP-LTE,” in Proc. IEEE Int. Conf. Acoustics, Speech, Signal Processing (ICASSP), Shanghai, China, 2016, pp. 1006-1010.

  3. Y.-C. Lin, T.-H. Liu, C.-P. Chou, and Y.-S. Chu, “Implementation of the SVD-based precoding sub-system for the compressed beamforming weights feedback in IEEE 802.11n/ac WLAN,” in. Proc. IEEE Int. Conf. Acoustics, Speech, Signal Processing (ICASSP), Brisbane, Australia, 2015, pp. 1081-1085.

  4. C.-P. Chou, T.-H. Liu, and C.-H. Wu, “Least squares estimation for direct conversion receivers with IQ-imbalance, “ in Proc. The IEEE Asia Pacific Wireless Commun. Symp. (APWCS), Ken-Ting, Taiwan, Aug. 2014. 

  5. C.-N. Chiu and T.-H. Liu, “Fast block-wise signal processing for layered STBC systems,” in Proc. IEEE Wireless Commun. and Networking Conf. (WCNC), Apr. 2013, pp. 2655-2660.

  6. T.-H. Liu and C.-N. Chiu, “Fast preprocessing schemes for the real-valued spatially multiplexed MIMO detectors,” in Proc. The IEEE Asia Pacific Wireless Commun. Symp. (APWCS), Singapore, Aug. 2011.

  7. T.-H. Liu, J.-Y. Jiang, and Y.-S. Chu, “MMSE-SIC detection for the MIMO system using backward substitution,” in Proc. The IEEE Asia Pacific Wireless Commun. Symp. (APWCS), Kao-Shiung, Taiwan, May 2010.

  8. C.-N. Chiu and T.-H. Liu, “Exact SER and diversity gain analysis of SDM-STBC MIMO systems over flat fading channels,” in Proc. IEEE Vehicular Technol. Conf. (VTC)-Spring, May 2010, pp. 1-5.

  9. C.-P. Chou, C.-H. Wu, T.-H. Liu, and Y.-T. Huang, “Space-frequency-coded MIMO OFDM receivers based on Gaussian message passing,” in Proc. IEEE Int. Conf. Commun. (ICC), Dresden, Germany, 2009, pp. 1-4.

  10. M.-S. Shiu and T.-H. Liu, “Practical signal recovery of WLAN OFDM signals in the presence of IQ imbalance, phase noise, and unknown channel frequency response,” in Proc. The 4th IEEE Asia Pacific Wireless Commun. Symp. (APWCS), Hsin-Chu, Taiwan, Aug. 2007.

  11. C.-C. Hu, H.-Y. Lin, T.-H. Liu, and Y.-S. Cheng, “Time-hopping UWB multiuser detection using adaptive multistage matrix Wiener filtering schemes,” in Proc. IEEE Int. Conf. Commun. (ICC), Glasgow, United Kingdom, June 2007, pp. 2540-2544.

  12. T.-H. Liu, “Efficient and stable MMSE detection of the V-BLAST system,” in Proc. IEEE Global Commun. (GLOBECOM) Conf., San Francisco, USA, Nov. 2006, pp. 1-5.

  13. T.-H. Liu, “Analysis of the principal component combining with weight estimation for DPSK signals,” in Proc. IEEE Int. Conf. Commun. (ICC), Istanbul, Turkey, June 2006, pp. 5053-5057.

  14. T.-H. Liu, “Principal component combining with differential detection for the demodulation of DPSK signals,” in Proc. IEEE Int. Conf. Commun. (ICC), Seoul, Korea, May 2005, pp. 2483-2487.

  15. T.-H. Liu, Y.-C. Li, and C.-C. Chang, “Application of array signal processing techniques to code division multiple access systems for blind channel estimation,” in Proc. The 14th IEEE 2003 Personal Indoor Mobile Radio Conf. (PIMRC), Beijing, China, Sept. 2003, pp. 2120-2124.

  16. T.-H. Liu, “Blind multiuser detection using linearly constrained minimum variance filters,” in Proc. IEEE Int. Symp. Inform. Theory (ISIT), Lausanne, Switzerland, July 2002, p. 492.

  17. C.-S. Hsu and T.-H. Liu, “Two-stage groupwise successive interference cancellation for the WCDMA system over frequency selective fading channels,” in Proc. The 2001 Int. Symp. Comm. (ISCOM01), Tainan, Taiwan, Nov. 2001.

  18. T.-H. Liu, “Approximate bit error probability calculation of decision-feedback linear multiuser detectors,” in Proc. IEEE Global Commun. (GLOBECOM) Conf., San Antonio, USA, Nov. 2001, pp. 851-855.

  19. T.-H. Liu, “Decision-feedback multiuser detection with feedforward orthogonal transformation,” in Proc. IEEE Int. Conf. Commun. (ICC), Helsinki, Finland, June 2001, pp. 837-841.

  20. T.-H. Liu and J. M. Mendel, “A gradient-based target tracking method using cumulants,” in Proc. The 32nd Asilomar Conf. Signals, Systems, and Computers, Monterey, U.S.A., Nov. 1998, pp. 702-706.

  21. T.-H. Liu and J. M. Mendel, “The robustness of virtual-ESPRIT against model errors,” in Proc. The 31st Asilomar Conf. Signals, Systems, and Computers, Monterey, U.S.A., Nov. 1997, pp. 458-462.

  22. T.-H. Liu and J. M. Mendel, “Azimuth/elevation direction finding using cumulants,” in Proc. The 30th Asilomar Conf. Signals, Systems, and Computers, Monterey, U.S.A., Nov. 1996, pp. 360-364.

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