Publications

In Journal:

  1. X. Li, F. Ng, and T. Han, "Carrier frequency offset mitigation in asynchronous cooperative OFDM transmissions," IEEE Trans. Signal Processing, vol. 56, no. 2, pp. 675-685, Feb. 2008.
  2. X. Li, J. Hwu and E. P. Ratazzi, "Using antenna array redundancy and channel diversity for secure wireless transmissions," Journal of Communications, vol. 2, no. 3, pp. 24-32, May 2007.
  3. N. E. Wu, S. Thavamani and X. Li, "Reliability and feedback of multiple hop wireless networks," International Journal of Automation and Computing, 04(2), pp. 125-134, April 2007.
  4. T. Han, X. Li and J. Lee, "Smart random channel access in OFDM systems by joint signal processing and packet scheduling,"  IJCSNS International Journal of Computer Science and Network Security, vol. 5, no. 9, Sept. 2005.
  5. X. Li, "Blind channel estimation and equalization in wireless sensor networks based on correlations among sensors," IEEE Trans. Signal Processing, vol. 53, no. 4, pp. 1511-1519, April 2005.
  6. X. Li, M. Chen and W. Liu, "Application of STBC-encoded cooperative transmissions in wireless sensor networks," IEEE Signal Processing Letters, vol. 12, no. 2, pp. 134-137, Feb. 2005.
  7. X. Li, "Space-time coded multi-transmission among distributed transmitters without perfect synchronization," IEEE Signal Processing Letters, vol. 11, no. 12, pp. 948-951, Dec. 2004.
  8. X. Li, "Contention resolution in random access wireless networks based on orthogonal complementary codes," IEEE Transactions on Communications, vol. 52, no. 1, pp. 82-89, Jan. 2004.
  9. X. Li, "Energy efficient wireless sensor networks with transmission diversity," Electronics Letters, vol. 39, no. 24, pp. 1753-1755, Nov. 27, 2003.
  10. X. Li, "Blind sequence detection without channel estimation," IEEE Transactions on Signal Processing, vol. 50, no. 7, pp. 1735-1746, July 2002.
  11. X. Li and H. Fan, "Blind channel identification: subspace tracking method without rank estimation", IEEE Transactions on Signal Processing, vol. 49, no. 10, pp. 2372-2382, Oct. 2001.
  12. X. Li and H. Fan, "Direct blind equalization with best delay by channel output whitening", IEEE Transactions on Signal Processing, vol 49, no. 7, pp. 1556-1563, July 2001.
  13. X. Li and H. Fan, "Direct blind multiuser detection for CDMA in multipath without channel estimation,'' IEEE Transactions on Signal Processing, vol 49, no. 1, pp. 63-73, January 2001. [pdf]
  14. H. Fan and X. Li, "Linear prediction approach for joint blind equalization and blind multiuser detection in CDMA systems,'' IEEE Transactions on Signal Processing, vol 48, no. 11, pp. 3134-3145 , November 2000. [pdf]
  15. X. Li and H. Fan, "Direct estimation of blind zero-forcing equalizers based on second order statistics,'' IEEE Transactions on Signal Processing, vol 48, no. 8, pp. 2211-2218, August 2000.  [pdf]
  16. X. Li and H. Fan, "Linear prediction methods for blind fractionally spaced equalization,'' IEEE Transactions on Signal Processing, vol 48, no. 6, pp. 1667-1675, June 2000. [pdf]
  17. X. Li and H. Fan, "QR factorization based blind channel identification and equalization with second-order statistics,''  IEEE Transactions on Signal Processing , vol 48, No. 1, pp. 60-69, January 2000. [pdf]
  18. X. Li  and T. Han, "Blind channel identification and equalization utilizing precoder correlations," submitted.
  19. X. Li and W. Liu, "Schedule random access of ad hoc wireless networks by multiuser detection principles, " submitted.
  20. X. Li and N. E. Wu, "Multi-transmission sensor networks for power efficiency and fault-to
    21. lerance," submitted.

In Conference:

  1. X. Li and J. Hwu, "A frequency hopping spread spectrum transmission scheme for uncoordinated cognitive radios," Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP'2009), Taipei, Taiwai, April 19-24, 2009. (slides)
  2. X. Li, "Efficient algorithm for hop optimization in multi-hop ad hoc wireless networks," Proceedings of 2008 ICST Second International Conference on Networks for Grid Applications and Workshops -- Wireless Grids, Beijing, China, Oct. 8-10, 2008. (slides)
  3. X. Li, J. Chen and J. Hwu, "Secondary transmission power of cognitive radios for dynamic spectrum access," 2008 International Workshop on Cognitive Networks and Communications (COGCOM2008), Hangzhou, China, Aug. 28, 2008.
  4. J. Hwu, J. Chen and X. Li, "Sum transmission power of multiple cooperative secondary transmitters in dynamic spectrum access networks," the 42nd Annual Conference on Information Sciences and Systems (CISS'2008), Princeton University, Mar. 19-21, 2008.
  5. X. Li, J. Chen and F. Ng, "Secure transmission power of cognitive radios for dynamic spectrum access applications," the 42nd Annual Conference on Information Sciences and Systems (CISS'2008), Princeton University, Mar. 19-21, 2008.
  6. X. Li, J. Hwu and F. Ng, "Transmission power and capacity of secondary users in a dynamic spectrum access network," IEEE Military Communications Conference (MILCOM'2007), Orlando, FL, Oct. 29-31, 2007. (slides)
  7. X. Li, "An efficient method for hop selection and capacity enhancement in multi-hop wireless ad-hoc networks," IEEE Military Communications Conference (MILCOM'2007), Orlando, FL, Oct. 29-31, 2007. (slides)
  8. F. Ng and X. Li, "CFO-resistant receiver for asynchronous MC-DS-CDMA systems," Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP'2007), Honolulu, Hawai'i, April 15-20, 2007.
  9. X. Li and F. Ng, "Using cyclic prefix to mitigate carrier frequency and timing asynchronism in cooperative OFDM transmissions," in Proceedings of the 40th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Oct. 29-Nov. 1, 2006.
  10. X. Li and J. Hwu, "Performance of cooperative transmissions in flat fading environment with asynchronous transmitters," IEEE Military Communications Conference (MILCOM'2006), Washington, DC, Oct. 23-25, 2006.
  11. X. Li, J. Hwu and E. P. Ratazzi, "Array redundancy and diversity for wireless transmissions with low probability of interception," Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP'2006), Toulouse, France, May 14-19, 2006.
  12. F. Ng and X. Li, "Cooperative STBC-OFDM transmissions with imperfect synchronization in time and frequency," in Proceedings of the 39th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Oct. 30-Nov. 2, 2005. (slides)
  13. X. Li, F. Ng, J. Hwu and M. Chen, "Channel equalization for STBC-encoded cooperative transmissions with asynchronous transmitters," in Proceedings of the 39th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Oct. 30-Nov. 2, 2005. (slides)
  14. X. Li and E. P. Ratazzi, "MIMO transmissions with information-theoretic secrecy for secret-key agreement in wireless networks," IEEE Military Communications Conference (MILCOM'2005), Atlantic City, NJ, Oct. 17-20, 2005. (slides)
  15. F. Ng, J. Hwu, M. Chen and X. Li, "Asynchronous space-time cooperative communications in sensor and robotic networks,"  the 2005 IEEE International Conference on Mechatronics and Automation (IEEE ICMA'2005), Niagara Falls, Ontario, Canada, July 29-August 1, 2005.
  16. X. Li, M. Chen and E. P. Ratazzi, "Array-transmission based physical-layer security techniques for wireless
    sensor networks    ," the 2005 IEEE International Conference on Mechatronics and Automation (IEEE ICMA'2005), Niagara Falls, Ontario, Canada, July 29-August 1, 2005.
  17. X. Li, M. Chen and E. P. Ratazzi, "Space-time transmissions for wireless secret-key agreement with information-theoretic secrecy," the 6th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC'05), The Italian Academy at Columbia University, New York, June 5-8, 2005. (slides)
  18. X. Li, M. Chen and E. P. Ratazzi, "A randomized space-time transmission scheme for secret-key agreement," the 39th Annual Conference on Information Sciences and Systems (CISS'2005), Johns Hopkins University, Mar. 16-18, 2005. (slides)
  19. N. E. Wu, X. Li and T. Busch, "Fault-tolerance in multihop wireless networks with and without feedback,'' Proc. IFAC World Congress, 2005.
  20. W. Liu, X. Li and M. Chen, "Energy efficiency of MIMO transmissions in wireless sensor networks with diversity and multiplexing gains," Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP'2005), Philadelphia, PA, Mar. 18-23, 2005. (slides)
  21. X. Li, M. Chen and W. Liu, "Cooperative transmissions in wireless sensor networks with imperfect synchronization," in Proceedings of the 38th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Nov. 2004. (slides)
  22. X. Li, "Blind channel identification and equalization in dense wireless sensor networks with distributed transmissions," in Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP'2004), Montreal, Quebec, Canada, May 17-21, 2004. (slides)
  23. T. Han and X. Li, "Blind adaptive equalization of OFDM transmission with insufficient cyclic prefix," in Proceedings of the 6th International Conference on Modern Problems of Radio Engineering, Telecommunications and Computer Science (TCSET'2004), Lviv-Slavsko, Ukraine, February 24-28, 2004.
  24. M. Chen and X. Li, "Transmitter-based channel equalization and MUI suppression for UWB systems," In Proceedings of the 6th International Conference on Modern Problems of Radio Engineering, Telecommunications and Computer Science (TCSET'2004), Lviv-Slavsko, Ukraine, February 24-28, 2004.
  25. X. Li and N. E. Wu, "Power efficient wireless sensor networks with distributed transmission-induced space spreading," in Proceedings of the 37th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Nov. 2003. (slides)
  26. T. Han and X. Li, "Smart random channel access in OFDM systems by joint signal processing and packet scheduling," in Proceedings of IEEE International Workshop on Soft Computing in Industrial Applications (SMCia/03), Binghamton, NY, June 13-25, 2003.
  27. X. Li, "Make random access contentions transparent by orthogonal complementary
    28. codes in wireless communications," in Proceedings of the IEEE International Conference on Communications (ICC 2003), vol. 3, pp. 2159-2163, Anchorage, AK, May 11-15, 2003. (slides)
  28. X. Li and W. Liu, "Smart contention resolution in random access wireless networks with unknown multiple users: a joint layer design approach," in Proceedings of the IEEE International Conference on Communications (ICC 2003), vol. 2, pp. 1243-1247, Anchorage, AK, May 11-15, 2003. (slides)
  29. T. Han and X. Li, "Minimum-output-energy method for blind equalization of OFDM and systems with sufficient or insufficient cyclic prefix," in Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP), vol. 4, pp. 225-228, Hong Kong, April 6-10, 2003.
  30. X. Li, "Channel independent Viterbi Algorithm for DNA sequencing," in 37th Annual Conference on Information Sciences and Systems (CISS), Baltimore, MD, March 12-14, 2003. presentation.
  31. X. Li, "Integration of system design and standard development in digital communication education," in the Proceedings of the Zone I Conference of the American Society for Engineering Education (ASEE), The United States Military Academy at West Point, NY, April 5-6, 2002. presentation.
  32. X. Li, "Utilizing channel coding information in CIVA-based blind sequence detectors," in Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP), vol. 3, pp. 2461-2464, Orlando, FL, May 13-17, 2002. (ppt)
  33. X. Li and T. Han, "Blind channel identification and equalization for precoded communication systems," in Proceedings of the IEEE International Conference on Communications (ICC), vol. 1, pp. 124-128, New York City, NY, April 29-May 1, 2002.
  34. X. Li, "Channel independent Viterbi algorithm (CIVA) for blind sequence detection with near MLSE performance," in Proceedings of the 35th Asilomar Conference on Signals, Systems and Computers, vol. 1, pp. 737-741, Pacific Grove, CA, Oct. 2001. Presentation[ppt]
  35. X. Li and H. Fan, "Blind Channel Identification by Subspace Tracking and Successive Cancellation," vol. 4, ICASSP'2001, Salt Lake City, UT, May 2001.
  36. X. Li and H. Fan, "Blind Multiuser Detection for CDMA with Multipath: A Direct Method," in Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, vol. 5, pp. 2901-2904, Istanbul, Turkey, June 5-9, 2000. [ postscript / pdf ]
  37. X. Li and H. Fan, "Blind zero-forcing equalization without channel estimation,"  33rd Asilomar Conference on Signals, Systems and Computers, vol. 2, pp. 1022-1026, Pacific Grove, CA, Oct. 24-27, 1999.   [pdf]
  38. H. Fan and X. Li, "An adaptive linear prediction algorithm for joint blind equalization and blind multiuser detection in CDMA,"  33rd Asilomar Conference on Signals, Systems and Computers, vol. 1, pp. 644-648, Pacific Grove, CA, Oct. 24-27, 1999.  [ pdf ]
  39. X. Li and H. Fan, "Recursive blind channel identification and equalization by ULV decomposition'', ICASSP'99, vol. 5, pp. 2639-2642, Arizona, Mar 1999.  [ pdf ]
  40. X. Li and H. Fan, "QR decomposition based blind channel identification and equalization,''32nd Asilomar Conference on signals, systems, and computers, vol. 2, pp. 1484-1488, Pacific Grove, CA, Nov. 1998.  [ pdf ]
  41. H. Fan and X. Li, "Joint blind multiuser detection and blind channel equalization in CDMA by linear prediction," 36th Annual Allerton Conference on Communication, Control, and Computing,  Urbana, IL, Sept. 1998.

Invited talks:

  1. X. Li, "Advanced antenna array transmission technology and wireless information assurance," the Mohawk Valley Section IEEE AP/MTT Society Chapter, the Griffiss Institute Center for Information Assurance, Aug. 2007.
  2. X. Li, "Collaborative communications in wireless networks without perfect synchronization," AFOSR program review, June 2004. Also available online: http://www.if.afrl.af.mil/tech/programs/CITE/afosr/index.html

Others (Technical Reports):

  1. N. E. Wu, X. Li and M. Ruschmann, "Robust resource allocation in an air operation model and robust tasking of wireless airborne networks," AFRL, contract FA8750-08-1-0223
  2. X. Li, "Secure cooperative communications and testbed development," AFRL-IF-RS-TS-2007, May 2007, Contract FA8750-06-0167.
  3. X. Li, "Wireless IA and cooperative communications," AFRL-IF-RS-TR-2006-104, March 2006.
  4. X. Li, "Cooperative communications for wireless information assurance," AFRL-IF-RS-TR-2005-279, Contract FA8750-04-1-0213, Air Force Research Laboratory, Information Directorate, Rome, NY, July 2005.

Some selected papers in Chinese:

  1. J. Chen, X. Li, B. Chen and F. Cai, "Research on smart residential wiring," Industrial Construction (in Chinese), to appear in July 2009.
  2. J. Chen, X. Li, B. Chen and F. Cai, "Discission of the application of cognitive radios," Communications Technology (in Chinese), to appear in October 2009.
  3. J. Chen, X. Li, B. Chen, F. Cai, X. Wang and G. Zheng, "Research on sensor network-based wireless switch," Electronic Devices (in Chinese), April 2009.
  4. J. Chen, X. Li, B. Chen, G. Zheng and X. Wang, "Availability analyses of CR in gray spectrum," Chinese Scientifi Papers On-line, #200811-488, Nov. 18, 2008. (http://www.paper.edu.cn)
  5. X. Li and S. Shi, "Robustness analysis and design of systems with an observer that are subject to perturbations of matrix elements (Chinese),'' J. Shanghai Jiao Tong Univ., vol. 28, No. 3, pp. 40-45, May 1994.
  6. X. Li and S. Shi, "Robust design of systems with an observer on the basis of eigenstructure assignment (Chinese),'' J. Fuzhou Univ. Nat. Sci. Ed., vol. 21, No. 5, pp. 12-17, Oct 1993.
  7. X. Li and J. Xu, "Research and development of DSP-based hearing aids,'' National BME Conference, Beijing, China, Oct. 1995.
  8. X. Li, "Speech processing using wavelet in multi-channel cochlear implant,'' National Youth BME Conference, China, 1994.
  9. X. Li and S. Shi, "Robust design: optimal approach to the ideal eigenstructure of the closed-loop system,'' National Control Conference, Shuzhou, China, 1993.
  10. X. Li and S. Shi, "Robust optimization of the static observer error of the system with an observer'', National Control Conference, 1994 (?)
  11. X. Li and J. Xu, "Filter's robust stability analysis'', National BME Conference, 1993(?)