Recent Courses:

• EE 4363 - Computer Architecture and Machine Organization
  
  
• 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 - Journals:

• Linkai Wang, Xiaofang Zhou, Gerald E. Sobelman and Ran Liu, "Generic Mixed-Radix FFT Pruning," IEEE Signal Processing Letters, Vol. 19, No. 3, pp. 167 - 170, March, 2012.
  
  
• Sangmin Kim, Gerald E. Sobelman and H. Lee, "A Reduced-Complexity Architecture for LDPC Layered Decoding Schemes," IEEE Transactions on Very Large Scale Integration (VLSI) Systems, Vol. 19, No. 6, pp. 1099 - 1103, June, 2011.
  
  
• Jing Wang and Gerald E. Sobelman, "Joint MIMO Transceiver Design Based on Uniform Channel Decomposition," Electronics Letters, Vol. 47, No. 5, pp. 345 - 346, March 3, 2011.
  
  
• Jie Yang and Gerald E. Sobelman, "Efficient mu-law Improved Proportionate Affine Projection Algorithm for Echo Cancellation," Electronics Letters, Vol. 47, No. 2, pp. 73 - 74, January 20, 2011.
  
  
• Wenqing Lu, Shuang Zhao, Xiaofang Zhou, Junyan Ren and Gerald E. Sobelman, "Reconfigurable Baseband Processing Architecture for Communication," IET Computers & Digital Techniques, Vol. 5, No. 1, pp. 63-72, January, 2011.
  
  
• Ming-ta Hsieh, Jim Welch and Gerald E. Sobelman, "PLL Performance Comparison with Application to Spread Spectrum Clock Generator Design," Analog Integrated Circuits and Signal Processing, Vol. 63, No. 2, pp. 197-216, May, 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," IEICE Transactions on Information and Systems, Vol. E93-D, No. 4, pp. 811-821, April, 2010.
  
  
• Fakhrul Z. Rokhani and Gerald E. Sobelman, "Bus Energy Consumption for Multilevel Signals," IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 57, No. 1, pp. 64-71, January, 2010.
  
  
• 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.
  
  
• 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.
  
  

Recent Publications - Conferences:

• Yan Zhao, Jinyuan Zhou, Xiaofang Zhou and Gerald E. Sobelman, "General Lattice Wave Digital Filter with Phase Compensation Scheme," Proceedings, ASICON, 2011.
  
  
• Zhang Zhang, Dongge Wang, Yuteng Pan, Dan Wang, Xiaofang Zhou and Gerald E. Sobelman, "FFT Implementation with Multi-Operand Floating Point Units," Proceedings, ASICON, 2011.
  
  
• Lian Huai, Gerald E. Sobelman and Xiaofang Zhou, "Wideband Spectrum Sensing using the All-phase FFT" (invited paper), Proceedings, ASICON, 2011.
  
  
• Kyung-Il Baek, Hanho Lee, Sangmin Kim and Gerald E. Sobelman, "A High-Throughput LDPC Decoder Architecture for High-Rate WPAN Systems," Proceedings, IEEE International Symposium on Circuits and Systems, pp. 1311 - 1314, 2011.
  
  
• Shuang Zhao, Xiaofang Zhou, Fanglong Ying and Gerald E. Sobelman, "Memory Size Reduction for Layered LDPC Decoders," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 426 - 429, 2010.
  
  
• Jie Yang and Gerald E. Sobelman, "Sparse LMS with Segment Zero Attractors for Adaptive Estimation of Sparse Signals," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 422 - 425, 2010.
  
  
• Xiaofang Zhou, Jinyuan Zhou, Linkai Wang, Chao Lu and Gerald E. Sobelman, "Novel and Flexible Complex Coefficient Linear Phase IIR Filters for Communications," Proceedings, IEEE Asia Pacific Conference on Circuits and Systems, pp. 434 - 437, 2010.
  
  
• Jing Wang and Gerald E. Sobelman, "Reconfigurable MIMO Transceiver Design using the Tunable Channel Decomposition," Proceedings, 44th Asilomar Conference on Signals, Systems and Computers, pp. 381 - 384, 2010.
  
  
• Jing Wang and Gerald E. Sobelman, "QoS-constrained MIMO Subchannel Allocation in SDR using the Tunable Channel Decomposition," Proceedings, International Conference on Wireless Communications, Networking and Mobile Computing, 2010.
  
  
• Jie Yang and Gerald E. Sobelman, "Frequency Domain Adaptive Tap Partial Update Adaptive Algorithm for Network Echo Cancellation," Proceedings, IEEE International Conference on Acoustics, Speech and Signal Processing, pp. 4046 - 4049, 2010.
  
  
• Jie Yang, Xiaoming Zhu, Gerald E. Sobelman and Keshab K. Parhi, "Sparseness-Controlled Adaptive Tap Algorithms for Partial Update Adaptive Filters," Proceedings, 7th International Conference on Information, Communications and Signal Processing, 2009.
  
  
• Woojoon Lee, Shuang Zhao, Xiaofang Zhou and Gerald E. Sobelman, "Software Defined Radio Architecture Using a Multicasting Network-on-Chip," Proceedings, 7th International Conference on Information, Communications and Signal Processing, 2009.
  
  
• Woojoon Lee and Gerald E. Sobelman, "Semi-distributed Scheduling for Flexible Codeword Assignment in a CDMA Network-on-Chip," Proceedings, ASICON, pp. 431 - 434, 2009.
  
  
• Qingqing Yang, Xiaofang Zhou and Gerald E. Sobelman, "Reed-Solomon Codec for a Reconfigurable Baseband Processing Platform," Proceedings, International Conference on Wireless Communications, Networking and Mobile Computing, 2009.
  
  
• 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.
  
  
• 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.
  
  
• 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.
  
  
• 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.
  
  

Papers Under Review:

• Jie Yang, Zigang Yang, Hardik Gandhi, and Gerald E. Sobelman, "Digital Pre-Distortion for Power Amplifiers with Dynamic Nonlinearities Using Power-Indexed Look-Up Tables."
  
  
• Jie Yang and Gerald E. Sobelman, "A Class of Gradient-Controlled Proportionate Algorithms for Acoustic Echo Cancellation."
  
  
• Qingqing Yang, Xiaofang Zhou, Xinxin Li and Gerald E. Sobelman, "Low Complexity Compression Technique for Modulo-normalized State Metrics in Turbo Decoders."
  
  
• Zhen Xiangyu, Xiaofang Zhou and Gerald E. Sobelman, "A Novel Fixed-Complexity Soft-Output MIMO Detector using Parallel Bidirectional Scheme."
  
  
• Wenqing Lu, Xiaofang Zhou, Gerald E. Sobelman and Junyan Ren, "FFT Design for OFDM-based Cognitive Radio using a Reconfigurable Baseband Processing Architecture."
  
  
• Jing Wang, Yi Jiang and Gerald E. Sobelman, "Iterative Computation of FIR MIMO MMSE-DFE with Flexible Complexity-Performance Tradeoff."
  
  
• Sangmin Kim and Gerald E. Sobelman, "Scaling, Offset and Balancing Techniques in FFT-Based BP Nonbinary LDPC Decoders."