VTVT - Research: Publications

Publications By Year

Note that following papers are copyrighted by the publishers.

Year 2009

N. Kong, A. Davoudi, M. Hagen, E. Oettinger, M. Xu, D.S. Ha, and F.C. Lee, "Automated System Identification of Digitally-Controlled Multi-phase DC-DC Converters," Applied Power Electronics Conference and Exposition, February 2009.

Year 2008

N. Kong, D.S. Ha, J. Li, and F.C. Lee, "Off-Time Prediction in Digital Constant On-Time Modulation for DC-DC Converters," International Symposium on Circuits and Systems, pp. 3270 - 3273, May 2008.
R. Thirugnanam and D.S. Ha, "A Feasibility Study on Frequency Domain ADC for Impulse-UWB Receivers,” International Conference on Circuits & systems for Communications, 5 pages, May 2008.
V. Chawla, R. Thirugnanam, D.S. Ha, and T.M. Mak, "Design of a Data Recovery Block for Communications over Power Distribution Networks of Microprocessors,” International Conference on Circuits & Systems for Communications, 5 pages, May 2008.
J. Kim, B. L. Grisso, J.K. Kim, D.S. Ha, and D.J. Inman, "Electrical Modeling of Piezoelectric Ceramics for Analysis and Evaluation of Sensory Systems,” Sensors Applications Symposium, pp. 122- 127, February 2008.

Year 2007

V. Chawla and D.S. Ha, "An Overview of Passive RFID," IEEE Applications & Practice, Supplement to IEEE Communications Magazine, Vol. 45, Issue 9, pp. 11-17, September 2007
J. Djigbenou, and D.S. Ha, "Development and Distribution of TSMC 0.25um Standard CMOS Library Cells, "International Conference on Microelectronic Systems Education, pp. 27-28, June 2007.
N. August, H.-J. Lee, and D.S. Ha, "Enabling Distributed Medium Access Control for Impulse-Based Ultra Wideband Radios," IEEE Transactions on Vehicular Technology, Vol. 56, No. 3, pp. 1064-1075, May 2007.
R. Thirugnanam, D.S. Ha, and T. M. Mak, "Data Recovery Block Design for Impulse Modulated Power Line Communications in a Microprocessor," IEEE Computer Society Annual Symposium on VLSI, pp.153-158, May 2007.
J. Kim, B. L. Grisso, D. S. Ha, and D. J. Inman, “Digital Wideband Excitation Technique for Impedance-Based Structural Health Monitoring Systems,” International Symposium on Circuits and Systems, pp. 3566-3569, May 2007.
J-S. Lee, and D.S. Ha, “High Speed 1-bit Bypass Adder Design for Low Precision Additions,” International Symposium on Circuits and Systems, pp. 1093-1096,May 2007.
J. Kim, B. L. Grisso, D. S. Ha, and D. J. Inman, “An All-Digital Low-Power Structural Health Monitoring System,” Conference on Technologies for Homeland Security, pp. 123-128, May 2007.
R. Thirugnanam, D.S. Ha, and T. M. Mak, “On Channel Modeling for Impulse-Based Communications over a Microprocessor's Power Distribution Network,” International Symposium on Power Line Communications, pp. 355-359, March 2007.
J. Djigbenou, T.V. Nguyen, C.W. Ren, and D.S. Ha, “Development of TSMC 0.25um Standard Cell Library,” IEEE Southeast Conference, pp. 566-568, March 2007.
D.S. Ha and P. Schaumont, “Replacing Cryptography with Ultra Wideband (UWB) Modulation in Secure RFID,” International Conference on RFID, pp. 23-29, March, 2007.
J. Kim, B.L. Grisso, D.S. Ha, and D.J. Inman, "A system-On-Board Approach for Impedance-Based Structural Health Monitoring," SPIE International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, March 2007.
Y. Qiu, J. Li, M. Xu, D. S. Ha, F. C. Lee, " Proposed DPWM Scheme with Improved Resolution for Switching Power Converters," Applied Power Electronics Conference and Exposition, pp. 1588-1593, February 2007.
J. Li, Y. Qiu, Y. Sun, B. Huang, M. Xu, D. S. Ha, F. C. Lee, "High Resolution Digital Duty Cycle Modulation Schemes for Voltage Regulators," Applied Power Electronics Conference and Exposition, pp. 871-876, February 2007.

Year 2006

N. August and D.S. Ha, “Operation, System Architectures, and Physical Layer Design Considerations of Distributed MAC Protocols for UWB,” IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 7, pp. 3001-3012, July 2006.
J-S. Lee, and D.S. Ha, "FleXilicon: a Reconfigurable Architecture for Multimedia and Wireless Communications," International Symposium on Circuits and Systems, pp. 4375-4378, May 2006
R. Thirugnanam, D.S. Ha, B.H. Park, and S.S. Choi, “Design of a Tunable Fully Differential GHz Range Gm-C Lowpass Filter in 0.18 μm CMOS for DS-CDMA UWB Transceivers,” International Symposium on Circuits and Systems, pp. 2377-2380, May 2006.
W.C. Chung, N.J. August, and D.S. Ha, “Impact of Ultra Wideband (UWB) Radio Range on Wireless Sensor Networks,” International Conference on Condition Monitoring and Diagnosis, Session 3.14 (4 pages), April, 2006.
H.-J. Lee, D. S. Ha, and S.S. Choi, “A 3-5 GHz CMOS UWB LNA with Input Matching Using Miller Effect,” International Solid-State Circuits Conference, Paper 11.6, February, 2006.
N.J. August, W.C. Chung and D.S. Ha, “Distributed MAC Protocols for Ultra Wideband Ad Hoc and Sensor Networks,” Radio and Wireless Symposium, pp. 511-514, January, 2006.

Year 2005

R.C. Palat, J. Kim, J.S. Lee, D.S. Ha, C. Patterson, and J.H. Reed, “Reconfigurable Modem Architecture for CDMA Based 3G Handsets,” 2005 Software Defined Radio Technical Conference and Product Exposition, Session 1.4-01 (7 pages), November, 2005.
W.C. Chung, and D.S. Ha, “A New Approach for Massive Parallel Scan,” International Test Conference, Paper 21.3, pp. 1-10, November 2005.
S. Yardi, K. Channakeshava, M.S Hsiao, T. Martin, D.S. Ha, “A Formal Framework for Modeling and Analysis of System-Level Dynamic Power Management,” International Conference on Computer Design, pp. 119-126, October 2005.
N.J. August, H.-J. Lee, and D.S. Ha, “Design of a Pulse Sensor to Detect Medium Activity in UWB Networks,” International Conference on Ultra Wideband, pp. 70-75, September 2005.
R. Thirugnanam, D.S. Ha, and S.S. Choi, “4-bit 1.4 GS/s Low Power Folding ADC for UWB Systems”, International Conference on Ultra Wideband, pp. 536-541, September 2005.
S. Wang, D.S. Ha, and S.S. Choi, “A 6-bit 5.4-Gsamples/s CMOS D/A Converter for DS-CDMA UWB transceivers”, International Conference on Ultra Wideband, pp. 333-338, September 2005.
W.C. Chung, D.S. Ha, and H.-J. Lee, “Dual Use of Power Lines for Data Communications in System-On-Chips Environments,” International Symposium on Circuits and Systems, pp. 3355–3358, May 2005.
J. Kim, D.S. Ha, and J.H. Reed, “A New Reconfigurable Modem Architecture for 3G Multi-Standard Wireless Communication Systems,” International Symposium on Circuits and Systems, pp. 1051–1054, May 2005.
S. Jose, H-.J. Lee, D.S. Ha, and S.S. Choi,. “A Low-power CMOS Power Amplifier for Ultra wideband (UWB) Applications,” International Symposium on Circuits and Systems, pp. 5111–5114, May 2005.
H.-J. Lee, D. S. Ha, and S.S. Choi, “A Systematic Approach to CMOS Low Noise Amplifier Design for Ultra wideband Applications,” International Symposium on Circuits and Systems, pp. 3962–3965, May 2005.
D. Nash, T.L. Martin, D.S. Ha, and M.S. Hsiao, “Towards an Intrusion Detection System for Battery Exhaustion Attacks on Mobile Computing Devices,” Second IEEE International Workshop on Pervasive Computing and Communication Security, pp. 141-145, March 2005.
S.M. Yardi, M.S. Hsiao, T.L. Martin, and D.S. Ha “Quality-Driven Proactive Computation Elimination for Power-Aware Multimedia Processing,” Proceedings on Design Automation and Test in Europe (DATE), pp. 340-345, March, 2005.

Year 2004

N.J. August and D. S. Ha, “An Efficient UWB Radio Architecture for Busy Signal MAC Protocols,” IEEE Conference on Sensor and Ad Hoc Communications and Networks, (10 pages), October, 2004.
N.J. August, H.-J. Lee, and D. S. Ha, “An Efficient Multi-User UWB Receiver for Distributed Medium Access in Ad Hoc and Sensor Networks,” IEEE Radio and Wireless Conference, pp. 455-458, September, 2004.
W.C. Chung, D.S. Ha, and David (Jianjun) Ni, “Performance Evaluation of an Ultra Wideband Radiolocation System with Directional Beacon,”IEEE Radio and Wireless Conference, pp. 59-62, September, 2004.
R. Mostafa, P. Khanna, W.C. Chung, J.W. Heo, J.H. Reed and D.S. Ha, “Performance Evaluation of 2D Rake Algorithms for WCDMA-DL Applications at the Handset,” IEEE Radio and Wireless Conference, pp. 367-370, September, 2004.
N.J. August and D.S. Ha, “Low Power Design of DCT and IDCT for Low Bit Rate Video Codecs,” IEEE Transactions on Multimedia, Vol. 6, No. 3, pp. 414-422, June 2004.
V. Srinivasan, D.S. Ha, and J.B. Sulistyo, "Gigahertz-Range MCML Multiplier Architectures," International Symposium on Circuits and Systems, Volume II, pp. 785-788, May 2004.
N.J. August, H.-J. Lee, and D. S. Ha, “Pulse Sense: A Method to Detect a Busy Medium in Pulse-Based Ultra Wideband (UWB) Networks,” IEEE Conference on Ultra Wideband Systems and Technologies, pp. 366-370, May 2004.
N.J. August, R. Thirugnanam, and D.S. Ha, “An Adaptive UWB Modulation Scheme for Optimization of Energy, BER, and Data Rate,”IEEE Conference on Ultra Wideband Systems and Technologies, pp. 182-186, May 2004.
H.-J. Lee, D. S. Ha, and H.-S. Lee, “Toward Digital UWB Radios: Part I – Frequency Domain UWB Receiver with 1 bit ADCs,” IEEE Conference on Ultra Wideband Systems and Technologies, pp. 248-252, May 2004.
H.-J. Lee, D. S. Ha, and H.-S. Lee, “Toward Digital UWB Radios: Part II – A System Design to Increase Data Throughput for a Frequency Domain UWB Receiver,” IEEE Conference on Ultra Wideband Systems and Technologies, pp. 253-257, May 2004.
N.J. August and H.-J. Lee, “Tackling Impulse UWB in Frequency Domain,”EE Times, May 17, 2004.
T. Martin, M. Hsiao, D.S. Ha, and J. Krishnaswami, "Denial-of-Service Attacks on Battery-Powered Mobile Computers," Second IEEE International Conference on Pervasive Computing and Communications, pp. 309-318, March 2004.

Year 2003

N.J. August, W.C. Chung and D.S. Ha, "Energy Efficient Methods of Increasing Data Rate for Ultra Wideband (UWB) Communications Systems," IEEE Conference on Ultra Wideband Systems and Technologies, pp. 280-284, November 2003.
W.C. Chung and D.S. Ha, "An Accurate Ultra Wideband (UWB) Ranging for Precision Asset Location," IEEE Conference on Ultra Wideband Systems and Technologies, pp. 389-393, November 2003.
H.-J. Lee, D.S. Ha, and H.-S. Lee, "A Frequency-Domain Approach for All-Digital CMOS Ultra Wideband Receivers," IEEE Conference on Ultra Wideband Systems and Technologies, pp. 86-90, November 2003.
K. Marsden, H.-J. Lee, D.S. Ha, and H.-S. Lee, "Low Power CMOS Re-programmable Pulse Generator for UWB Systems," IEEE Conference on Ultra Wideband Systems and Technologies, pp. 443-337, November 2003.
J.B. Sulistyo and D.S. Ha, "5 GHz Pipelined Multiplier and Mac in 0.18 um Complementary Static CMOS," International Symposium on Circuits and Systems, pp. 117-120, May 2003.
S.W. Kim, D. S. Ha, and J.H. Reed, "Minimum Selection GSC and Adaptive Low-Power Rake Combining Scheme," International Symposium on Circuits and Systems, pp. 357-360, May 2003.
W.C. Chung and D.S. Ha, "On the Performance of Bi-Phase Modulated UWB Signals in a Multipath Channel," IEEE Vehicular Technology Conference, pp. 1654-1658, April 2003.
H-J. Lee and D.S. Ha, "Frequency Domain Approach for CMOS Ultra-Wideband Radios," IEEE Computer Society Annual Symposium on VLSI, pp. 236-237, February 2003.
H-J. Lee and D.S. Ha, "An Area and Power Efficient Rake Receiver Architecture for DSSS Systems," IEEE International SOC Conference, pp.103-106, September 2003.

Year 2002

J.B. Sulistyo and D.S. Ha, "New Characterization Method for Delay and Power Dissipation of Standard Library Cells," Journal of VLSI Design, Vol.15, No. 3, pp. 667-678, November 2002.
J.B. Sulistyo and D.S. Ha, "HyPipe: A New Approach for High Speed Circuit Design," IEEE International ASIC/SOC Conference, pp. 203-207, September 2002.
H-J. Lee and D.S. Ha, "A New Low-Power and Area Efficient Rake Receiver Design Without Incurring Performance Degradation," IEEE International ASIC/SOC Conference, pp. 251-255, September 2002.
T.J. Yamaguchi, D.S. Ha, M. Ishida, and T. Ohmi, "A Method for Compressing Test Data Based on Burrows-Wheeler Transformation," IEEE Transactions on Computers, Vol. 51, pp. 486-497, May 2002.

Year 2001

S. W. Kim, D. S. Ha, J. H. Kim, and J. H. Kim, "Performance of Smart Antennas with Adaptive Combining at Handsets for the 3GPP WCDMA System," IEEE Vehicular Technology Conference, pp. 2048-2052, October 2001.
C. Aust and D.S. Ha, "A Low-Power Variable Resolution Analog-to-Digital Converter," IEEE International ASIC/SOC Conference, pp. 460-463, September 2001.
N. August and D.S. Ha, " On the Low-Power Design of DCT and IDCT for Low Bit Rate Video Codecs," IEEE International ASIC/SOC Conference, pp. 203-207, September 2001.
S. W. Kim, D. S. Ha, J.H. Kim, and J. H. Kim, "Performance Gain of Smart Antennas with Hybrid Combining at Handsets for the 3GPP WCDMA System," International Symposium on Wireless Personal Multimedia Communications, pp. 289-294, September 2001.
S. Richmond and D.S. Ha, " A Low-Power Motion Estimation Block for Low Bit-Rate Wireless Video," International Symposium on Low Power Electronics and Design, pp. 60-63, August 2001.
S.W. Kim, D.S. Ha, and J.H. Kim, "Performance Gain of Smart Antennas with Diversity Combining at Handsets for the 3GPP WCDMA System," International Conference on Wireless Communications, pp. 235-242, July 2001.
S. W. Kim, D. S. Ha, and J. H. Kim, "Performance of Smart Antennas with Adaptive Combining at Handsets for the cdma2000 System," International Conference on Third Generation Wireless and Beyond, pp. 882-887, May/June 2001.
M. Jagasivamani and D.S. Ha, "Development of a Low-Power SRAM Compiler," International Conference on Circuits and Systems, Volume 4, pp. 498-501, May 2001.
M. Ishida, D.S. Ha, T. Yamaguchi, Y. Hashimoto, and T. Ohmi, "IDDT Testing: An Efficient Method for Detecting Delay Faults and Open Defects," IEEE International Workshop on Defect Based Testing, pp. 23-28, April 2001.

Year 2000

S.W. Kim, D.S. Ha, and J.H. Kim, "Performance Gain Of Smart Dual Antennas at Handsets in 3G CDMA System," CDMA International Conference, Vol. 2, pp. 223-227, November 2000.
S. Yoo, K. Choi, and D.S. Ha, "Performance Improvement of Geographically Distributed Cosimulation by Hierarchically Grouped Messages," IEEE Transactions on Very Large Scale Integration (VLSI) Systems, Vol. 8, pp. 492-502, October 2000.
H.B. Kim and D.S. Ha, "Design and Synthesis of Built-In Self-Testable Two-Dimensional Discrete Cosine Transform Circuits," IEEE International ASIC/SOC Conference, September 2000.
S.-C. Shin, H. Baik, M.-S. Park and D.S. Ha, "A Center-Biased Hybrid Search (CBHS) Method by Using Plus Search for Block Motion Estimation," International Conference on Circuits and Systems, Vol. IV, pp. 309-312, May 2000.
S.-C. Shin, H. Baik, M.-S. Park, and D.S. Ha, "A Center-Biased Hybrid Search (CBHS) Method for Block Motion Estimation", Proceedings of the Fifth International Conference on Computer Science and Informatics, March 2000, (4 pages).