J. Kwon, W. Santipach, and S. Mahapakulchai "Rate-Maximizing User Selection for Downlink NOMA
With Effect of Log-Normal Shadowing," in Proc. IEEE Int. Women in Engineering Conf. on Electrical
and Computer Engineering (WIECON-ECE), Pattaya, Thailand, Dec. 2018, pp. 13-16.

J. Kwon, C. Srivichein, and W. Santipach, "Optimal User Selection With Binary Search for Downlink
NOMA (in Thai)," in Proc. Electrical Engineering Conf. (EECON), Ubonratchathani, Thailand,
Nov. 2018, pp. 45-48.

K. Jiravanstit and W. Santipach, "Power-Minimizing Transmission Mode for Cell-Edge D2D Pair
Underlaying Cellular Network," in Proc. Int. Technical Conf. on Circuits/Systems, Computers,
and Commun. (ITC-CSCC), Busan, South Korean, Jul. 2017, pp. 436-439.

W. Santipach and K. Jiravanstit, "On Selecting Communication Mode for a D2D Pair in Underlay
Cellular Network With Multi-Antenna Base Station," in Proc. Int. Conf. on Electronics, Info.,
and Commun. (ICEIC), Phuket, Thailand, Jan. 2017, pp. 521-523.

T. Thaikerd and W. Santipach, "On optimizing transmit antenna placement for downlink distributed
antenna systems with zero-forcing beamforming," in Proc. ECTI-CON, Huahin, Thailand,
June 2015, pp. 1-5.

J. Wisanmongkol and W. Santipach, "Chunk-based subcarrier assignment with power allocation
and rate constraints for downlink OFDMA ," in Proc. Int. Symp. on Commun. and Info.
Technologies (ISCIT), Incheon, South Korea, Sep. 2014, pp. 494-498.

K. Mamat and W. Santipach, "Optimal subcarrier allocation for 2-user downlink multiantenna
OFDMA channels with beamforming interpolation," in Proc. Int. Symp. on Commun. and Info.
Technologies (ISCIT), Samui, Thailand, Sep. 2013, pp. 116-121. [Best Paper Award]

K. Mamat and W. Santipach, "On Transmit Beamforming for Multiantenna OFDM Channels
With Finite-Rate Feedback," in Proc. IEEE Int. Conf. on Commun. (ICC), Budapest, Hungary,
Jun. 2013, pp. 5689-5693. (The complete article was published in IEEE Trans. Commun.,
Nov. 2015.)

P. Kas-udom and W. Santipach, "Minimum-Energy Bit Allocation Over Powerline OFDM Channels,"
in Proc. ECTI-CON, Krabi, Thailand, May 2013, pp. 1-5. (The complete article was published in
Kasetsart J. (Nat. Sci.), Nov.-Dec. 2013.)

A. Tonsirisittikun and W. Santipach, "Transmit Power Allocation Schemes For Wireless OFDM
Channels with Finite-Rate Feedback," in Proc. ICICTES, Samutsongkhram, Thailand, Jan. 2013,
pp. 98-101. [Best Paper Award]

K. Mamat and W. Santipach, "Subcarrier Clustering for MISO-OFDM Channels with Quantized
Beamforming," in Proc. ECTI-CON, Huahin, Thailand, May 2012, pp. 1-4. [Best Paper Award]
(The complete article was published in IEEE Trans. Commun., Nov. 2015.)

D. Khrutmuang and W. Santipach, "Antenna Subset Selection for MIMO Channels With Mutual
Coupling," in Proc. ECTI-CON, Huahin, Thailand, May 2012, pp. 1-4.

W. Santipach and K. Mamat, "Optimal Feedback Interval for Temporally-Correlated Multiantenna
Channel," in Proc. IEEE Global Commun. Conf. (GLOBECOM), Houston, Texas, USA, Dec. 2011.

W. Santipach, "On the Optimal Sum Capacity for OFDM With On/Off Power Allocation and
Imperfect Channel Estimation," in Proc. IEEE Int. Symp. on Spread-Spectrum Tech. & Appl.
(ISSSTA), Taichung, Taiwan, Oct. 2010, pp. 75-80.

K. Mamat and W. Santipach, "Kd-Tree Codebook for Limited Feedback CDMA,"
in Proc. IEEE Int. Conf. on Telecommun. (ICT), Doha, Qatar, Apr. 2010, pp. 820-825.

W. Santipach, "Quantized Transmit Beamforming With Antenna Selection in a MIMO Channel,"
in Proc. ACM Int. Wireless Commun. and Mobile Computing Conf. (IWCMC), Leipzig, Germany,
June 2009.

K. Mamat and W. Santipach, "Multiuser Signature Quantization With Tree-Structured Codebook
in DS-CDMA," in Proc. ECTI-CON, Pattaya, Thailand, May 2009, vol. 2, pp. 870-873.

W. Santipach, "Tree-structured Random Vector Quantization for beamforming in a multiantenna
channel," in Proc. ECTI-CON, Krabi, Thailand, May 2008, vol. 1, pp. 325-328.

W. Santipach, "Asymptotic performance of DS-CDMA with linear MMSE receiver and limited
feedback," in Proc. IEEE Int. Conf. on Commun. (ICC), Beijing, China, May 2008.

W. Santipach and M. L. Honig, "Optimization of training and feedback for beamforming over
a MIMO channel," in Proc. IEEE Wireless Commun. and Networking Conf. (WCNC),
Hong Kong, China, Mar. 2007.

K. Sil, M. Agarwal, D. Guo, M. L. Honig, and W. Santipach, "Performance of Turbo decision-
feedback detection for downlink OFDM," in Proc. IEEE Wireless Commun. and Networking
Conf. (WCNC), Hong Kong, China, Mar. 2007.

W. Santipach and M. L. Honig, "Capacity of beamforming with limited training and feedback,"
in Proc. IEEE Int. Symp. on Inform. Theory (ISIT), Seattle, Washington, July 2006.

W. Santipach and M. L. Honig, "Achievable rates for MIMO fading channels with limited feedback
and linear receivers," in Proc. IEEE Int. Symp. on Spread-Spectrum Tech. & Appl. (ISSSTA),
Sydney, Australia, Aug. 2004.

W. Santipach and M. L. Honig, "Asymptotic capacity of beamforming with limited feedback,''
in Proc. IEEE Int. Symp. on Inform. Theory (ISIT), Chicago, Illinois, June 2004, p. 290.

W. Santipach, Y. Sun, and M. L. Honig, "Benefits of limited feedback for wireless channels," in Proc.
Allerton Conf. on Commun., Control, and Computing, Monticello, Illinois, Oct. 2003.

W. Santipach and M. L. Honig, "Asymptotic performance of MIMO wireless channels with limited
feedback,'' in Proc. IEEE Military Commun. Conf. (MILCOM), Boston, Massachusetts, Oct. 2003,
pp.141-146.

W. Santipach and M. L. Honig, "Interference avoidance for DS-CDMA with limited feedback,"
in Proc. IEEE Int. Symp. on Inform. Theory (ISIT), Yokohama, Japan,  June 2003, p. 445.

W. Santipach and M. L. Honig, "Signature optimization for DS-CDMA with limited feedback,"
in Proc. IEEE Int. Symp. on Spread-Spectrum Tech. & Appl. (ISSSTA), Prague, Czech Republic,
Sept. 2002, pp. 180-184.