Publications

Journals and CS Conferences

Machine Learning Conferences

3. Seungyul Han and Youngchul Sung, "AMBER: Adaptive Multi-Batch Experience Replay for Continuous Action Control ," to be presented at the 2nd Workshop on Scaling Up Reinforcement Learning (SURL) in conjunction with the 28th International Joint Conference on Artificial Intelligence (IJCAI) 2019, Macao, China, Aug. 2019

2. Seungyul Han and Youngchul Sung, "Dimension-Wise Importance Sampling Weight Clipping for Sample-Efficient Reinforcement Learning," the 36th International Conference on Machine Learning (ICML) 2019, Long Beach, CA, USA, Jun. 2019

1. Woojun Kim, Myungsik Cho, and Youngchul Sung, "Message-dropout: An efficient training method for multi-agent deep reinforcement learning," the 33rd AAAI Conference on Artificial Intelligence (AAAI ) 2019, Honolulu, Hawaii, Jan. 2019

Journals

Submitted (Asterisks denotes corresponding authors.)

41. Jungho So, Youngchul Sung*, and Yong H. Lee, "Tomlinson-Harashima precoding-aided multi-antenna non-orthogonal multiple access," submitted to IEEE Journal of Selected Topics in Signal Processing, Aug. 2018

Published or Accepted

40. Junyeong Seo, Youngchul Sung*, and Hamid Jafarkhani, "A high-diversity transceiver design for MISO broadcast channels," IEEE Transactions on Wireless Communications, vol. 18, no. 5, pp. 2591 - 2606, May 2019

39. Junyeong Seo and Youngchul Sung*, "Beam design and user scheduling for non-orthogonal multiple access with multiple antennas based on Pareto-optimality" IEEE Transactions on Signal Processing, vol. 66, no. 11, pp. 2876 - 2891, Jun. 2018.

38. Gilwon Lee and Youngchul Sung*, "A new approach to user scheduling in massive multi-user MIMO broadcast channels," IEEE Transactions on Communications, vol. 66, no. 4, pp. 1481 – 1495, Apr. 2018

37. Seungyul Han, Youngchul Sung*, and Yong H. Lee, "Filter design for generalized frequency-division multiplexing," IEEE Transactions on Signal Processing, vol. 65, no. 7, pp. 1644 - 1659, Apr. 2017.

36. Jungho So and Youngchul Sung*, "Improving non-orthogonal multiple access by forming relaying broadcast channels," IEEE Communications Letters, vol. 20, no. 9, pp. 1816 - 1819, Sep. 2016. An extended version is available at arXiv.

35. Gilwon Lee, Youngchul Sung*, and Marios Kountouris, "On the performance of random beamforming in sparse millimeter wave channels," IEEE Journal of Selected Topics in Signal Processing, vol. 10, no. 3, pp. 560 - 575, Apr. 2016.

34. Junyeong Seo, Youngchul Sung*, Gilwon Lee, and Donggun Kim, "Training beam sequence design for millimeter-wave MIMO systems: A POMDP framework," IEEE Transactions on Signal Processing, vol. 64, no. 5, pp. 1228 - 1242, Mar. 2016

33. Gilwon Lee, Youngchul Sung*, and Junyeong Seo, "Randomly-directional beamforming in mm-wave multi-user MISO downlink," IEEE Transactions on Wireless Communications, vol. 15, no. 2, pp. 1086 - 1100, Feb. 2016

32. Donggun Kim, Gilwon Lee, and Youngchul Sung*, "Two-stage beamformer design for massive MIMO downlink by trace quotient formulation," IEEE Transactions on Communications, vol. 63, no. 6, pp. 2200- 2211, Jun. 2015.

31. Jungho So, Donggun Kim, Yuni Lee, and Youngchul Sung*, "Pilot signal design for massive MIMO systems: A received signal-to-noise-ratio-based approach," IEEE Signal Processing Letters, vol. 52, no. 5, pp. 549 - 553, May 2015.

30. Song Noh, Youngchul Sung*, and Michael Zoltowski, "A new precoder design for blind channel estimation in MIMO-OFDM systems," IEEE Transactions on Wireless Communications, vol. 13, no. 12, pp. 7011-7024, Dec. 2014.

29. Song Noh, Michael Zoltowski, Youngchul Sung*, and David Love "Pilot beam pattern design for channel estimation in massive MIMO systems," IEEE Journal of Selected Topics in Signal Processing, vol. 8, no. 5, pp. 787 - 801, Oct. 2014.

28. Donggun Kim, Youngchul Sung*, and Jihoon Chung, "Filter-and-forward relay design for MIMO-OFDM systems," IEEE Transactions on Communications, vol. 62, no. 7, pp. 2329 - 2339, Jul. 2014. Proof of Lemma 1

27. Junse Lee, Heejung Yu and Youngchul Sung*, "Beam tracking for interference alignment in time-varying MIMO interference channels: A conjugate gradient based approach," IEEE Transactions on Vehicular Technology, vol. 63, no. 2, pp. 958 - 964, Feb. 2014.

26. Juho Park and Youngchul Sung*, "On the Pareto-optimal beam structure and design for multi-user MIMO interference channels," IEEE Transactions on Signal Processing, vol. 61, no. 23, pp. 5932 - 5946, Dec. 2013.

25. Donggun Kim, Junyeong Seo and Youngchul Sung*, "Filter-and-forward transparent relay design for OFDM systems," IEEE Transactions on Vehicular Technology , vol. 62, no. 9, pp. 4392-4407, Nov. 2013.

24. Yingbo Yua*, Daniel W. Bliss, Saeed Gazor, Yue Rong, and Youngchul Sung, "Guest Editorial: Theories and methods for advanced wireless relays - Issue II" IEEE Journal on Selected Areas in Communications, vol. 31, no. 8, pp. 1361 - 1367, Aug. 2013

23. Juho Park, Gilwon Lee, Youngchul Sung* and Masahiro Yukawa, "Coordinated beamforming with relaxed zero forcing: The sequential orthogonal projection combining method and rate control," IEEE Transactions on Signal Processing, vol. 61, no. 12, pp. 3100 - 3112, Jun. 2013.

22. Masahiro Yukawa, Youngchul Sung* and Gilwon Lee, "Dual-domain adaptive beamformer under linearly and quadratically constrained minimum variance," IEEE Transactions on Signal Processing, vol. 61, no. 11, pp. 2874 - 2886, Jun. 2013.

21. Yuni Lee and Youngchul Sung*, "Generalized Chernoff information for mismatched Bayesian detection and its application to energy detection," IEEE Signal Processing Letters, vol. 19, no. 11, pp. 753 - 756, Nov. 2012.

20. Juho Park, Youngchul Sung*, Donggun Kim and H. Vincent Poor, "Outage probability and outage-based robust beamforming for MIMO interference channels with imperfect channel state information," IEEE Transactions on Wireless Communications, vol. 11, no. 10, pp. 3561 - 3573, Oct. 2012. ( A technical report related to the paper regarding series expansion of Gaussian quadratic forms is also available.)

19. Yingbo Yua*, Daniel W. Bliss, Saeed Gazor, Yue Rong, and Youngchul Sung, "Guest Editorial: Theories and methods for advanced wireless relays - Issue I," IEEE Journal on Selected Areas in Communications, vol. 30, no. 8, pp. 1297 - 1303, Sep. 2012

18. Cheulsoon Kim, Youngchul Sung* and Yong H. Lee, "A joint time-invariant filtering approach to the linear Gaussian relay problem," IEEE Transactions on Signal Processing , vol. 60, no. 8, pp. 4360 - 4375, Aug. 2012. Matlab code.

17. Haksoo Kim, Heejung Yu, Youngchul Sung* and Yong H. Lee, "An efficient algorithm for zero-forcing coordinated beamforming," IEEE Communications Letters, vol. 16, no. 7, pp. 994 - 997, Jul. 2012

16. Youngseok Oh, Heejung Yu, Yong H. Lee and Youngchul Sung*, "A nonlinear transceiver architecture for overloaded MIMO interference channels," IEEE Transactions on Communications, vol. 60, no. 4, pp. 946 - 951, Apr. 2012.

15. Heejung Yu, Youngchul Sung*, Haksoo Kim and Yong H. Lee, "Beam tracking for interference alignment in slowly-fading MIMO interference channels: A perturbations approach under a linear framework," IEEE Transactions on Signal Processing, vol. 60, no. 4, pp. 1910 - 1926, Apr. 2012.

14. Heejung Yu and Youngchul Sung*, "Least squares approach to joint beam design for interference alignment in multiuser multi-input multi-output interference channels," IEEE Transactions on Signal Processing, vol. 58, no. 9, pp. 4960 - 4966, Sep. 2010. (Matlab codes for the algorithm are main and iterative least squares (ILS) algorithm subroutine. )

13. Jo Woon Chong, Dan Keun Sung* and Youngchul Sung, "Cross-layer performance analysis for CSMA/CA protocols: Impact of imperfect sensing," IEEE Transactions on Vehicular Technology, vol. 59, no. 3, pp. 1100 - 1108, Mar. 2010.

12. Jo Woon Chong, Youngchul Sung* and Dan Keun Sung, "RawPEACH: Multi-band CSMA/CA-based cognitive radio networks," Journal of Communications and Networks, vol. 11, no. 2, pp. 174 - 185, Apr. 2009.

--- Early Works: CDMA and Detection/Estimation ---

11. Yirang Lim, Juho Park and Youngchul Sung*, "Upper bound for the loss of energy detection of signals in multipath fading channels," IEEE Signal Processing Letters, vol. 16, no. 11, pp. 949 - 952, Nov. 2009.

10. Youngchul Sung*, H. Vincent Poor and Heejung Yu, "How much information can one get from a wireless ad hoc sensor network over a correlated random field?," IEEE Transactions on Information Theory, vol. 55, no. 6, pp. 2827 - 2847, Jun. 2009. Simple Condition for Theorem 2.

9. Youngchul Sung*, Yirang Lim, Lang Tong and Alle-Jan van der Veen, "Signal processing advances for 3G WCDMA: From rake receivers to blind techniques," IEEE Communications Magazine, no. 1, pp. 48 - 54, Jan. 2009

8. Youngchul Sung*, Xin Zhang, Lang Tong and H. Vincent Poor, "Sensor configuration and activation for field detection in large sensor arrays," IEEE Transactions on Signal Processing, vol. 56, no. 2, pp. 447 - 463, Feb. 2008.

7. Youngchul Sung*, Saswat Misra, Lang Tong and Anthony Ephremides, "Cooperative routing for distributed detection in large sensor networks," IEEE Journal on Selected Areas in Communications, Vol. 25, no. 2, pp. 471 - 483, Feb. 2007.

6. Youngchul Sung, Saswat Misra, Lang Tong* and Anthony Ephremides, "Signal processing for application-specific ad-hoc networks," IEEE Signal Processing Magazine, vol. 23, no. 5, pp. 74 - 83, Sep. 2006.

5. Youngchul Sung, Lang Tong* and H. Vincent Poor, "Neyman-Pearson detection of Gauss-Markov signals in noise: Closed-form error exponent and properties," IEEE Transactions on Information Theory, vol. 52, no. 4, pp. 1354-1365, Apr. 2006. (This paper's conference version won ICASSP 2005 Paper Award.)

4. Youngchul Sung, Lang Tong* and Ananthram Swami, "Asymptotic locally optimal detector for large scale sensor networks under the Poisson regime," IEEE Transactions on Signal Processing, vol. 53, no. 6, pp. 2005 - 2017, Jun. 2005.

3. Youngchul Sung, Lang Tong* and Ananthram Swami, "Blind channel estimation for space-time coded WCDMA," EURASIP Journal on Wireless Communications and Networking, vol. 2004, no. 2, pp. 322-334, Dec. 2004.

2. Youngchul Sung and Lang Tong*, "Tracking of fast-fading channels in long code CDMA," IEEE Transactions on Signal Processing, vol. 52, no.3, pp. 786-795, Mar. 2004.

1. Lang Tong*, Alle-Jan van der Veen, Patrick Dewilde and Youngchul Sung, "Blind decorrelating RAKE receiver for long code WCDMA," IEEE Transactions on Signal Processing, vol. 51, no. 6, pp.1642-1655, Jun. 2003.

Korean Articles

6. J. Chung, J. So, J. Seo, G. Par, and Y. Sung*, “Introduction to 5G mmWave Communication,” Technology Trends, Special Series on 5G, pp. 1 – 14, National IT Industry Promotion Agency (NIPA), Apr. 2018 (an invited article)

5. Youngchul Sung*, “An introduction to multiple access in wireless communications,” KICS Information and Communication Magazine – Open Lecture Series, vol. 33, no. 6, pp. 10 – 17, Jun. 2016 (an invited article)

4. Jihoon Chung, Donggun Kim, and Youngchul Sung*, “Design of amplify-and-forward helper stations for Cellular networks with device-to-device links,” The Journal of Korean Institute of Communications and Information Sciences, vol. 41, no. 5, pp. 539 – 545, May 2016

3. Gilwon Lee, Youngchul Sung*, Jungho So, and Junyeong Seo, “Research trends for realization of 5G massive MIMO,” IEEK Magazine, pp. 16 - 34, Oct. 2015 (an invited article)

2. Heejung Yu, Juho Park, Youngchul Sung*, and Yong H. Lee, “Research trends in interference alignment for multi-user interference channels,” IEEK Magazine, pp. 204 – 216, Apr. 2013 (an invited article)

1. Youngchul Sung*, Juho Park, and Donggun Kim, “Trends and advances in multi-cell MISO/MIMO technologies,” KICS Information and Communication Magazine, pp. 11 – 18, Aug. 2012 (an invited article)