Research Interest

Dr. Pan has performed research on variable complexity algorithms in video coding and
communications. His research interests include image and video compression, VLSI
architectures for signal processing, and adaptive computation control for wireless channel
decoding algorithms.

Degrees

• B.E., Electrical Engineering, Zhongshan University, 1990
• M.S., Electrical Engineering, Zhongshan University, 1993
• M.S., Computer Engineering, University of Louisiana, 1998
• Ph.D., Electrical Engineering, University of Southern California, 2002

Recent Publications

H. Alzoubi, and W. D. Pan, “Reducing the complexity of MPEG-4 global motion estimation using pixel subsampling,” IET Electronics Letters, vol. 44, no. 1, pp. 20 – 22, January 2008.

W. D. Pan, S.-M. Yoo,  C.-H. Park, “Complexity Accuracy Tradeoffs of Lie Operators in Motion Estimation,” Pattern Recognition Letters, vol. 28, no. 7, pp. 778-787, May 2007.

R. A. AL-Na'mneh, W. D. Pan, and S.-M. Yoo, “Parallel Implementation of 1-D Fast Fourier Transform without Inter-Processor Communication,” International Journal of Computers and Applications, vol. 29, no. 2, 2007.

W. D. Pan, S.-M. Yoo, C.-H. Park, "Complexity Accuracy Tradeoffs of Lie Operators in Motion Estimation," Pattern Recognition Letters, vol. 28, no. 7, pp. 778-787, May 2007.

R. A. Al-Na'mneh and W. D. Pan, "Five-Step FFT Algorithm with Reduced Computational Complexity," Information Processing Letters, vol. 101, no. 6, pp. 262-267, March 2007.

W. D. Pan, S.-M. Yoo, M. Nalasani, and P. Cox, "Efficient Local Transformation Estimation Using Lie Operators," Information Sciences, vol. 177, no. 3, pp. 815-831, February 2007.

R. A. AL-Na'mneh, W. D. Pan, and S.-M. Yoo, "Parallel Implementation of 1-D Fast Fourier Transform without Inter-Processor Communication," International Journal of Computers and Applications, vol. 29, no. 2, 2007.

R. A. Al-Na'mneh, W. D. Pan, and S.-M. Yoo, "Efficient Adaptive Algorithm for Transposing Small and Large Matrices on Symmetric Multiprocessors," International Journal Informatica, vol. 17, no. 4, pp. 535-550, 2006.

Y. Kanamori, S.-M. Yoo, W. D. Pan, and F. T. Sheldon, "A Short Survey on Quantum Computers," International Journal of Computers and Applications, vol. 28, no. 3, pp. 227-233, 2006.

W. D. Pan, and S.-M. Yoo, "Fano Decoding with Timeout: Queueing Analysis," ETRI Journal, vol. 28, no. 3, pp. 301-310, June 2006.

R. A. Al-Na'mneh, W. D. Pan, and S.-M. Yoo, "Two Parallel 1-D FFT algorithms without All-to-All Communication," Parallel Processing Letters, vol. 16, no. 2, pp. 153-164, June 2006.

C.-H. Park, S.-M. Yoo, H. Choo, and W. D. Pan, "Multi-User Data Multiplexing for Digital Multimedia Broadcasting," Computer Communications, vol. 29, no. 18, pp. 3970 - 3975, 2006.

A. M. Shams, A. Chidanandan, W.D. Pan, and M. A. Bayoumi, "NEDA: A Low-Power High-Performance DCT Architecture," IEEE Trans. on Signal Processing, vol. 54, no. 3, pp. 955 - 964, March 2006.

S. M. Yoo, D. Kotturi, W. D. Pan, and J. Blizzard, "An AES Crypto Chip Using A High-Speed Parallel Pipelined Architecture," Microprocessors and Microsystems, vol. 29, no. 7, pp. 317-326, Sep. 2005.

T. Davis, S.-M. Yoo, and W. D. Pan, "Dissecting a Network-Based Education System," Technological Horizons in Education (T.H.E.) Journal, Sep. 2005.

W. D. Pan and M. Nalasani, "Reversible Logic," IEEE Potentials, pp. 38-41, February / March, 2005.

Recent Conference Publications

H. Alzoubi, and W. D. Pan, “Fast and Accurate Global Motion Estimation by Combining Pixel Subsampling and Outlier Rejection,” Proc. of Picture Coding Symposium (PCS’07), Lisbon, Portugal, November 2007.

J. Cai, and W. D. Pan, “Particle Swarm Optimization Algorithm For Block Based Motion Estimation,” Proc. of Huntsville Simulation Conference (HSC’07), Huntsville, Alabama, October 2007.

H. Alzoubi and W. D. Pan, “Efficient Global Motion Estimation Using Fixed and Random Subsampling Patterns,” in Proc. of IEEE International Conference on Image Processing, San Antonio, TX, September 2007.

H. Alzoubi, and W. D. Pan, "Very Fast Global Motion Estimation using Partial Data", in Proc. of the 32nd International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Honolulu, Hawaii, April, 2007.

H. Alzoubi, and W. D. Pan, "Fast Global Motion Estimation using Partial Data", in Proc. of Huntsville Simulation Conference (HSC'06), Huntsville, Alabama, Nov. 2006.

H. Alzoubi, and W. D. Pan, "Floating-Point Genetic Algorithm for Translational Motion Estimation", in Proc. of Huntsville Simulation Conference (HSC'06), Huntsville, Alabama, Nov. 2006.

J. Cai, and W. D. Pan, "Simulation of Fast Motion Estimation based on a Modified Particle Swarm Optimization Method", in Proc. of Huntsville Simulation Conference (HSC'06), Huntsville, Alabama, Nov. 2006.

R. Al Na'mneh and W. D. Pan, "Hybrid MPI / Pthread Implementation of 1-D FFT on SMP," in Proc. of IEEE Southeastern Symposium on System Theory, Cookeville, TN, March 2006.

R. Al Na'mneh and W. D. Pan, "Two-Step 1-D Fast Fourier Transform without Inter-Processor Communications," in Proc. of IEEE Southeastern Symposium on System Theory, Cookeville, TN, March 2006.

K. Darabkh and W. D. Pan, "Stationary Queue-Size Distribution for Variable Complexity Sequential Decoders with Large Timeouts," in Proc. of 44th ACM Southeast Conference, Melbourne, Florida, March 2006.

K. Darabkh and W. D. Pan, "Queueing Simulation for Fano Decoders with Finite Buffer Capacity," to appear in the 9th Communications and Networking Simulation Symposium (CNS'06), Huntsville, Alabama, April 2006.

K. Darabkh and W. D. Pan, "Queue-Size Distribution for Fano Decoders," in Proc. of Huntsville Simulation Conference (HSC'05), Huntsville, Alabama, Nov. 2005.

K. Darabkh and W. D. Pan, "Queueing Simulation for Sequential Decoders with Timeout," in Proc. of Huntsville Simulation Conference (HSC'05), Huntsville, Alabama, Nov. 2005.

P. Paritala and W. D. Pan, "Higher Order Statistical Analysis of Steganographic Images using Wavelet Transforms," in Proc. of Huntsville Simulation Conference (HSC'05), Huntsville, Alabama, Nov. 2005.

A. Watkins and W. D. Pan, "Simulation of Hidden Message Length Estimation of LSB Steganography," in Proc. of Huntsville Simulation Conference (HSC'05), Huntsville, Alabama, Nov. 2005.

M. Nalasani and W. Pan, "Performance Evaluation of MPEG-2 Codec with Accurate Motion Estimation," Proc. of IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama, March 2005.

M. Nalasani and W. Pan, "Object Transformation Estimation with Low Complexity," Proc. of IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama, March 2005.

A. G. Veeravalli, M. Nalasani and W. Pan, "Covariance Analysis of Non-Translational Motion-Compensated," Proc. of IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama, March 2005.

R. Al Na'mneh, W. Pan, and R. Adhami, "Parallel Implementation of 1-D Fast Fourier Transform without Inter-processor Communication," Proc. of IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama, March 2005.

A. G. Veeravalli, W. Pan, R. Adhami, and P. G. Cox, "A Tutorial on Using Hidden Markov Models for Phoneme Recognition," Proc. of IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama, March 2005.

Al Na'mneh, W. Pan, and R. Adhami, "Communication Efficient Adaptive Matrix Transpose Algorithms for FFT on Symmetric Multiprocessors," Proc. of IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama, March 2005.

W. Pan and S.-M Yoo, "Queuing Analysis of Sequential Decoders with Buffers," Proc. of Huntsville Simulation Conference (HSC'04), Huntsville, Alabama, Nov. 2004.

W. Pan, "Computation and Buffer Analysis of Fano Decoders in Portable Mobile Computing," Proc. of UAH Young Faculty Research Proceedings, Dec. 2004.

M. Nalasani and W. Pan, "Transformation Estimation with Sub-Pixel Accuracy," Proc. of Huntsville Simulation Conference (HSC'04), Huntsville, Alabama, Nov. 2004.

A. G. Veeravalli, W. Pan, R. Adhami and P. G. Cox, "Phoneme Recognition using Hidden Markov Models," Proc. of Huntsville Simulation Conference (HSC'04), Huntsville, Alabama, Nov. 2004.

R. A. Al Na'mneh, and W. Pan, "Performance Analysis of Parallel Algorithms for One Dimension FFT on Symmetric Multiprocessors," Proc. of the International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA'04), pp. 80-83, Las Vegas, Nevada, June 2004.

R. A. Al Na'mneh, and W. Pan, "Efficient and Scalable Parallel Processing Methods for Transposing Matrices on Symmetric Multiprocessors," Proc. of the International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA'04), pp. 84-89, Las Vegas, Nevada, June 2004.

M. Nalasani and W. Pan, "Accuracy, Rate and Complexity Tradeoffs of Transformation Estimation using Lie Operators," Proc. of International Conference on Imaging Science, Systems and Technology (CISST'04), pp. 210-216, Las Vegas, Nevada, June 2004.