Recent Courses:

• EE 3940 - Global Seminar: Nano-Bio Circuits and Systems in London and Paris
  
  
• EE 4301 - Digital Design with Programmable Logic
  
  
• EE 4541 - Digital Signal Processing
  
  
• EE 5327 - VLSI Design Laboratory
  
  

Research Areas:

I am interested in the design of low-power and high-performance VLSI circuits and systems. Custom circuit techniques as well as System-on-Chip, Network-on-Chip, FPGA and ASIC platforms are investigated. Design applications include special-purpose architectures for communications and signal processing.

Recent Publications:

• Woojoon Lee and Gerald E. Sobelman, "Mesh-Star Hybrid NoC Architecture with CDMA Switch," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 1349-1352, 2009.
  
  
• Qingquan Zhang, Gerald E. Sobelman and Tian He, "Gradient-Based Target Localization in Robotic Sensor Networks," Pervasive and Mobile Computing, Vol. 5, No. 1, pp. 37-48, February, 2009.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Architectures for Multi-Gigabit Wire-Linked Clock and Data Recovery," IEEE Circuits and Systems Magazine, Vol. 8, No. 4, pp. 45-57, Fourth Quarter, 2008.
  
  
• Xiaofang Zhou, Shuang Zhao, Wenqing Lu, Chao Lu and Gerald E. Sobelman, "Reconfigurable Baseband Processing Platform for Communication Systems," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 29-32, 2008.
  
  
• Sangmin Kim, Gerald E. Sobelman and Hanho Lee, "Flexible LDPC Decoder Architecture for High-Throughput Applications," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 45-48, 2008.
  
  
• Fakhrul Z. Rokhani, Wen-Chih Kan, John Kieffer and Gerald E. Sobelman, "Optimality of Bus-Invert Coding," IEEE Transactions on Circuits and Systems-II: Express Briefs, Vol. 55, No. 11, pp. 1134-1138, Nov., 2008.
  
  
• Shuang Zhao, Wenqing Lu, Chao Lu, Xiaofang Zhou, Dian Zhou and Gerald E. Sobelman, "An Efficient Multi-protocol RFID Interrogator Baseband Processor based on a Reconfigurable Architecture," Proceedings, International Conference on Embedded Software and Systems, pp. 264-270, 2008.
  
  
• Wenqing Lu, Shuang Zhao, Chao Lu, Xiaofang Zhou and Gerald E. Sobelman, "A Heterogeneous Reconfigurable Baseband Architecture for Wireless LAN Transceivers," Proceedings, IEEE International Conference on Electro Information Technology, pp. 284-288, 2008.
  
  
• Sangmin Kim, Gerald E. Sobelman and Hanho Lee, "Adaptive Quantization in Min-Sum based Irregular LDPC Decoder," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 536-539, 2008.
  
  
• Qingquan Zhang, Yu Gu, Tian He and Gerald E. Sobelman, "Cscan: A Correlation-based Scheduling Algorithm for Wireless Sensor Networks," Proceedings, IEEE International Conference on Networking, Sensing and Control, pp. 1025-1030, 2008.
  
  
• Woojoon Lee and Gerald E. Sobelman, "Bandwidth-Reusable CDMA NoC with Flexible Codeword Assignment," Proceedings, ASICON, pp. 910-913, 2007.
  
  
• Fakhrul Zaman Rokhani and Gerald E. Sobelman, "Multi-level Signaling for Energy-Efficient On-Chip Interconnects," Proceedings, ASICON, pp. 82-85, 2007.
  
  
• Wen-Chih Kan and Gerald E. Sobelman, "High Speed Look-Ahead LMS Detector for MIMO Systems," Proceedings, IEEE Workshop on Signal Processing Systems, pp. 56-60, 2007.
  
  
• Wen-Chih Kan and Gerald E. Sobelman, "MIMO Transceiver Design Based on a Modified Geometric Mean Decomposition," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 677-680, 2007.
  
  
• Qingquan Zhang, Gerald E. Sobelman and Tian He, "Gradient-Driven Target Location Acquisition in Mobile Wireless Sensor Networks," Proceedings, International Conference on Mobile Ad-hoc and Sensor Networks, Lecture Notes in Computer Science, Vol. 4325, pp. 365-376, 2006, Springer.
  
  
• Wen-Chih Kan and Gerald E. Sobelman, "Hardware Channel Model for Ultra Wideband Systems," Proceedings, IEEE International Conference on Field Programmable Technology, pp. 297-300, 2006.
  
  
• Kai-Chuan Chang and Gerald E. Sobelman, "FPGA-Based Design of a Pulsed-OFDM System," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 1128-1131, 2006.
  
  
• Fakhrul Zaman Rokhani and Gerald E. Sobelman, "Low-Power Bus Transform Coding for Multilevel Signals," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 1272-1275, 2006.
  
  
• Kai-Chuan Chang and Gerald E. Sobelman, "Noise Model Analysis of Optimized Mixed-Radix Structures for Pulsed OFDM," Proceedings, IEEE GLOBECOM, 2006.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Comparison of LC and Ring VCOs for PLLs in a 90 nm Digital CMOS Process," Proceedings, International SoC Design Conference, pp. 19-22, 2006.
  
  
• Qingquan Zhang, Woong Cho, Gerald E. Sobelman, Liuqing Yang and Richard Voyles, "TwinsNet: A Cooperative MIMO Mobile Sensor Network," Proceedings, International Conference on Ubiquitous Intelligence and Computing, Lecture Notes in Computer Science, Vol. 4159, pp. 508-516, 2006, Springer.
  
  
• Ebrahim Saberinia, Kai-Chuan Chang, Gerald E. Sobelman and Ahmed H. Tewfik, "Implementation of a Multi-band Pulsed-OFDM Transceiver," The Journal of VLSI Signal Processing Systems for Signal, Image and Video Technology, Vol. 43, No. 1, pp. 73-88, April, 2006.
  
  
• Manho Kim, Daewook Kim and Gerald E. Sobelman, "Network-on-Chip Quality-of-Service through MultiProtocol Label Switching," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 1840-1843, 2006.
  
  
• Manho Kim, Daewook Kim and Gerald E. Sobelman, "Network-on-Chip Link Analysis under Power and Performance Constraints," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 4163-4166, 2006.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "DCOS: Cache Embedded Switch Architecture for Distributed Shared Memory Multiprocessor SoCs," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 979-982, 2006.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "NIUGAP: Low Latency Network Interface Architecture with Gray Code for Networks-on-Chip," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 3902 - 3905, 2006.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Modeling and Verification of High-Speed Wired Links with Verilog-AMS," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 2105 - 2108, 2006.
  
  
• Wen-Chih Kan and Gerald E. Sobelman, "Reduced Complexity MIMO MMSE-DFE," Proceedings, Asilomar Conference on Signals, Systems and Computers, pp. 824-828, 2005.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "Design of a High-Performance Scalable CDMA Router for On-Chip Switched Networks," Proceedings, International SoC Design Conference, pp. 32-35, 2005.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Accurate Prediction of Jitter Tolerance in High-Speed Serial Links," Proceedings, International SoC Design Conference, pp. 243-246, 2005.
  
  
• Wen-Chih Kan and Gerald E. Sobelman, "Efficient DFE Architecture for MIMO Communication Systems," Proceedings, International SoC Design Conference, pp. 268-271, 2005.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "Asynchronous FIFO Interfaces for GALS On-Chip Switched Networks," Proceedings, International SoC Design Conference, pp. 186-189, 2005.
  
  
• Manho Kim, Daewook Kim and Gerald E. Sobelman, "Adaptive Scheduling for CDMA-Based Networks-On-Chip," Proceedings, IEEE Northeast Workshop on Circuits and Systems, pp. 100-103, 2005.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "FPGA-Based CDMA Switch for Networks-on-Chip," Proceedings, IEEE Symposium on Field-Programmable Custom Computing Machines, pp. 283-284, 2005.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "Parallel FFT Computation with a CDMA-Based Network-On-Chip," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 1138-1141, 2005.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Clock and Data Recovery with Adaptive Loop Gain for Spread Spectrum SerDes Applications," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 4883-4886, 2005.
  
  
• Manho Kim, Daewook Kim and Gerald E. Sobelman, "MPEG-4 Performance Analysis for a CDMA Network-on-Chip," Proceedings, International Conference on Communications Circuits and Systems, Vol. 1, pp. 493-496, 2005.
  
  
• Kai-Chuan Chang, Gerald E. Sobelman, Ebrahim Saberinia and Ahmed H. Tewfik, "Transmitter Architecture for Pulsed OFDM," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 693-696, 2004.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Simultaneous Bidirectional PAM-6 Wired Link with Adaptive Pre-Emphasis and Trellis Coding," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 485-488, 2004.
  
  
• Daewook Kim, Manho Kim and Gerald E. Sobelman, "CDMA-Based Network-on-Chip Architecture," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 137-140, 2004.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Simultaneous Bidirectional PAM-4 Link with Built-In Self-Test," Proceedings, IEEE International SOC Conference, pp. 255-258, 2004.
  
  
• Kai-Chuan Chang, Gerald E. Sobelman, Ebrahim Saberinia and Ahmed H. Tewfik, "Performance of N-Tone Sigma-Delta Modulators for UWB-OFDM," Proceedings, IEEE International Conference on Communications, pp. 2483-2486, 2004.
  
  
• Kai-Chuan Chang, Gerald E. Sobelman, Ebrahim Saberinia and Ahmed H. Tewfik, "Analysis of Higher-Order N-Tone Sigma-Delta Modulators for Ultra Wideband Communications," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 4, pp. 113-116, 2004.
  
  
• Kavitha Seshadri, Adrianne Pontarelli, Gauri Joglekar and Gerald E. Sobelman, "Design Techniques for Pulsed Static CMOS," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 2, pp. 929-932, 2004.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "Simultaneous Bi-Directional Signaling with Adaptive Pre-Emphasis," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 4, pp. 397-400, 2004.
  
  
• Ebrahim Saberinia, Ahmed H. Tewfik, Kai-Chuan Chang and Gerald E. Sobelman, "Analog to Digital Converter Resolution Effects on Multi-band OFDM and Pulsed-OFDM Ultra Wideband Systems," Proceedings, IEEE International Symposium on Control, Communications and Signal Processing, pp. 787-790, 2004.
  
  
• Hanho Lee and Gerald E. Sobelman, "VLSI Design of Digit-Serial FPGA Architecture," Journal of Circuits, Systems and Computers, Vol. 13, No. 1, pp. 17-52, February, 2004.
  
  
• Ming-ta Hsieh and Gerald E. Sobelman, "SiGe BiCMOS PAM-4 Clock and Data Recovery Circuit for High-Speed Serial Communications," Proceedings, IEEE International SOC Conference, pp. 305-308, 2003.
  
  
• Ankit Seedher and Gerald E. Sobelman, "Fractional Rate Phase Detectors for Clock and Data Recovery," Proceedings, IEEE International SOC Conference, pp. 313-316, 2003.
  
  
• Hanho Lee and Gerald E. Sobelman, "Performance Evaluation and Optimal Design for FPGA-Based Digit-Serial DSP Functions," Computers & Electrical Engineering, Vol. 29, Issue 2, pp. 357-377, March, 2003.
  
  
• Hanho Lee and Gerald E. Sobelman, "FPGA-Based Digit-Serial CSD FIR Filter for Image Signal Format Conversion," Microelectronics Journal, Vol. 33, No. 5-6, pp. 501-508, May-June, 2002.
  
  
• Gunok Jung, Venkat Sundarajan and Gerald E. Sobelman, "A Robust Self-Resetting CMOS 32-Bit Parallel Adder," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 1, pp. 473-476, 2002.
  
  
• Gunok Jung, Junjin Kong, Gerald E. Sobelman and Keshab K. Parhi, "High-Speed Add-Compare-Select Units Using Locally Self-Resetting CMOS," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 1, pp. 889-892, 2002.
  
  
• Sungwook Kim, Gerald E. Sobelman and Jaekyun Moon, "Parallel VLSI Architectures for a Class of LDPC Codes," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 2, pp. 93-96, 2002.
  
  
• Sungwook Kim and Gerald E. Sobelman, "Efficient Digit-Serial FIR Filters With Skew-Tolerant Domino," Proceedings, IEEE International Symposium on Circuits and Systems, Vol. 4, pp. 369-372, 2002.
  
  
• Sungwook Kim and Gerald E. Sobelman, "Digit-Serial Multiplier Design Using Skew-Tolerant Domino Circuits," Proceedings, IEEE International ASIC/SOC Conference, pp. 356-360, 2001.
  
  
• Sungwook Kim and Gerald E. Sobelman, "Digit-Serial Modular Multiplication Using Skew-Tolerant Domino CMOS," Proceedings, IEEE International Conference on Acoustics, Speech and Signal Processing, Vol. 2, pp. 1173-1176, 2001.
  
  
• Gunok Jung, Seonki Kim and Gerald E. Sobelman, "High-Speed CORDIC Implementations Using Advanced Circuit Techniques," Proceedings, IEEE International Conference on Acoustics, Speech and Signal Processing, Vol. 2, pp. 1237-1240, 2001.
  
  
• Gunok Jung and Gerald E. Sobelman, "High-Speed Adder Design Using Time Borrowing and Early Carry Propagation," Proceedings, IEEE International ASIC/SOC Conference, pp. 43 - 47, 2000.
  
  
• Lijun Gao and Gerald E. Sobelman, "Improved VLSI Designs for Multiplication and Inversion in GF(2^m) over Normal Bases," Proceedings, IEEE International ASIC/SOC Conference, pp. 97 - 101, 2000.
  
  
• Jian Ding and Gerald E. Sobelman, "ATM Switch Design Using Code Division Multiple Access Techniques," Proceedings, IEEE International Symposium on Circuits and Systems, pp. I-379 - I-382, 2000.
  
  
• Gunok Jung, Victoria Perepelitsa and Gerald E. Sobelman, "Time Borrowing in High-Speed Functional Units Using Skew-Tolerant Domino Circuits," Proceedings, IEEE International Symposium on Circuits and Systems, pp. V-641 - V-644, 2000.
  
  

Accepted for Publication:

• Fakhrul Z. Rokhani and Gerald E. Sobelman, "Bus Energy Consumption for Multilevel Signals," to be published in IEEE Transactions on Circuits and Systems I.
  
  
• Qingqing Yang, Xiaofang Zhou and Gerald E. Sobelman, "Reed-Solomon Codec For A Reconfigurable Baseband Processing Platform," to be published in Proceedings, International Conference on Wireless Communications, Networking and Mobile Computing, 2009.
  
  
• Woojoon Lee and Gerald E. Sobelman, "Semi-distributed Scheduling for Flexible Codeword Assignment in a CDMA Network-on-Chip," to be published in Proceedings, ASICON, 2009.
  
  
• Ming-ta Hsieh, Jim Welch and Gerald E. Sobelman, "PLL Performance Comparison with Application to Spread Spectrum Clock Generator Design," to be published in Analog Integrated Circuits and Signal Processing.
  
  
• Woojoon Lee, Shuang Zhao, Xiaofang Zhou and Gerald E. Sobelman, "Software Defined Radio Architecture Using a Multicasting Network-on-Chip," to be published in Proceedings, 7th International Conference on Information, Communications and Signal Processing, 2009.
  
  
• Jie Yang, Xiaoming Zhu, Gerald E. Sobelman and Keshab K. Parhi, "Sparseness-Controlled Adaptive Tap Algorithms for Partial Update Adaptive Filters," to be published in Proceedings, 7th International Conference on Information, Communications and Signal Processing, 2009.
  
  
• Jie Yang and Gerald E. Sobelman, "Frequency Domain Adaptive Tap Partial Update Adaptive Algorithm for Network Echo Cancellation," to be published in Proceedings, IEEE International Conference on Acoustics, Speech and Signal Processing, 2010.
  
  
• Shuang Zhao, Wenqing Lu, Xiaofang Zhou, Dian Zhou and Gerald E. Sobelman, "Implementations of FFT and STBD for MIMO-OFDM on a Reconfigurable Baseband Platform," to be published in IEICE Transactions on Information and Systems E.
  
  
• Sangmin Kim, Gerald E. Sobelman and H. Lee, "A Reduced-Complexity Architecture for LDPC Layered Decoding Schemes," to be published in IEEE Transactions on VLSI Systems.
  
  

Papers Under Review:

• Woojoon Lee and Gerald E. Sobelman, "Multicasting and Bandwidth Reallocation in a CDMA Network-on-Chip."
  
  
• Shanshan Chen, Xiaofang Zhou, Linkai Wang, Ming'e Jing and Gerald E. Sobelman, "Fast Algorithm for Floorplan and Power Distribution Network Co-Design."
  
  
• Wenqing Lu, Shuang Zhao, Xiaofang Zhou, Junyan Ren and Gerald E. Sobelman, "Reconfigurable Baseband Processing Architecture for Communication."
  
  
• Jinyuan Zhou, Linkai Wang, Xiaofang Zhou, Chao Lu and Gerald E. Sobelman, "Complex Coefficient Linear Phase IIR Filters."
  
  
• Jing Wang and Gerald E. Sobelman, "Joint MIMO Transceiver Design Based on the Uniform Channel Decomposition."