Journal Papers

D. Lee, H, Kim, M. Rahimi, D. Estrin and J.D. Villasenor, " Energy-Efficient Image Compression for Resource-Constrained Platforms," IEEE Transactions on Image Processing, to appear.


D. Lee, R.C.C. Cheung, W. Luk, and J. D. Villasenor, " Hierarchical Segmentation for Hardware Function Evaluation ," IEEE Transactions on VLSI Systems, vol. 17, no. 1, pp. 103-116, January 2009.


D. Lee and J. D. Villasenor, " Optimized Custom Precision Function Evaluation for Embedded Processors ," IEEE Transactions on Computers, vol. 58, no. 1, pp. 46-59, January 2009.


H. Kim, M. Rahimi, D. Lee, D. Estrin, and J. D. Villasenor, "Energy-aware high resolution image acquisition via heterogeneous image sensors," IEEE Journal of Selected Topics in Signal Processing, vol. 2, no. 4, pp. 526-537, August 2008.


H. Kim, D. Lee, and J. D. Villasenor, "Design Tradeoffs and Hardware Architecture for Real-Time Iterative MIMO Detection Using Sphere Decoding and LDPC Coding," IEEE Journal on Selected Areas in Communications, vol. 26, no. 6, pp. 1003-1014, August 2008.


D. Choi, K. Choi, and J.D. Villasenor, "New Non-volatile Memory Structures for FPGA Architectures," IEEE Transactions on VLSI Systems, vol. 16, no. 7, pp. 874-881, July 2008.


H. Kim and J. D. Villasenor, "Secure MIMO Communications in a System with Equal Numbers of Transmit and Receive Antennas," IEEE Communications Letters, vol. 12, no. 5, pp. 386-388, May 2008.


D. Lee, H. Kim, C. Jones, and J. D. Villasenor, "Pilotless frame synchronization for LDPC-coded transmission systems," IEEE Transactions on Signal Processing, vol. 56, no. 7, pp. 2865 - 2874, July 2008.


D. Lee, R.C.C. Cheung, J.D. Villasenor, and W. Luk, "Hardware implementation tradeoffs of polynomial approximations and interpolations," IEEE Transactions on Computers, vol. 57, no. 5, pp. 686-701, May 2008.


D.B. Thomas, W. Luk, P.H.W. Leong, and J.D. Villasenor, "Gaussian Random Number Generators," ACM Computing Surveys, volume 39, issue 4, article 11, Oct 2007.


D. Lee, H. Kim, C.R. Jones, and J.D. Villasenor, "Pilotless frame synchronization via LDPC code constraint feedback," IEEE Communications Letters, volume 11, number 8, pages 683-685, Aug 2007.


R.C.C. Cheung, D. Lee, W. Luk, and J.D. Villasenor, "Hardware generation of arbitrary random number distributions from uniform distributions via the inversion method," IEEE Transactions on VLSI Systems, volume 15, number 8, pages 952-962, Aug 2007.


H. Kim, J. Wen, and J.D. Villasenor, "Secure Arithmetic Coding," IEEE Transactions on Signal Processing, vol. 55, no.5, pp. 2263 - 2272, May 2007.


D. Lee, R.C.C. Cheung, and J.D. Villasenor, "A flexible architecture for precise gamma correction," IEEE Transactions on VLSI Systems, volume 15, number 4, pp. 474-479, Apr 2007.


D. Lee and J.D. Villasenor, "A bit-width optimization methodology for polynomial-based function evaluation," IEEE Transactions on Computers, vol. 56, no. 4, pp. 567-571, Apr 2007.


C. Jones, T. Tian, J. Villasenor, and R. Wesel, "The Universal Operation of LDPC Codes over Scalar Fading Channels," IEEE Transactions on Communications, Vol. 55, No. 1, pp.122-132, Jan 2007.


M.D. Smith and J. Villasenor, "JPEG-2000 Rate Control for Digital Cinema," SMPTE Motion Imaging Journal, Vol. 115, No. 10, pp.394-399, Oct 2006.


D. Lee, J.D. Villasenor, W. Luk and P.H.W. Leong, "A hardware Gaussian noise generator using the Box-Muller method and its error analysis," IEEE Transactions on Computers, vol. 55, no. 6, pp. 659-671, Jun 2006.


D. Lee, E.L. Valles, J.D. Villasenor and C.R. Jones, "Joint LDPC decoding and timing recovery using code constraint feedback," IEEE Communications Letters, volume 10, number 3, pages 189-191, Mar 2006.


J. Wen, H. Kim and J.D. Villasenor "Binary Arithmetic Coding with Key-Based Interval Splitting," IEEE Signal Processing Letters, vol. 13, no. 2, pp.69-72, February 2006.


D. Lee, W. Luk, J.D. Villasenor, G. Zhang and P.H.W. Leong, "A hardware Gaussian noise generator using the Wallace method," IEEE Transactions on VLSI Systems, volume 13, number 8, pages 911-920, Aug 2005.


P.H.W. Leong, G. Zhang, D. Lee, W. Luk and J.D. Villasenor, "A Comment on the Implementation of the Ziggurat Method," Journal of Statistical Software, volume 12, number 7, Feb 2005.


D. Lee, W. Luk, J.D. Villasenor and P.Y.K Cheung, "A Gaussian Noise Generator for Hardware-Based Simulations," IEEE Transactions on Computers, vol. 53, no. 12, pp. 1523-1534, Dec. 2004.


D. Lee, W. Luk, J.D. Villasenor and P.Y.K Cheung, "The Effects of Polynomial Degrees on the Hierarchical Segmentation Method," In New Algorithms, Architectures, and Applications for Reconfigurable Computing, chapter 24, W. Rosenstiel and P. Lysaght (Eds.), Springer-Verlag, Dec 2004.


T. Tian, C. Jones, J. Villasenor, and R. Wesel, "Selective Avoidance of Cycles in Irregular LDPC Code Construction," IEEE Transactions on Communications, vol. 52, no. 8, pp. 1242-1247, August 2004.


K. Lakovic, J. Villasenor, "An Algorithm for Construction of Efficient Fix-Free Codes," IEEE Communication Letters, vol. 7, no. 8, pp. 391-393, August 2003.


J. Garcia-Frias, J. D. Villasenor, "Combined Turbo Detection and Decoding for Unknown ISI Channels," IEEE Trans. on Communications, vol. 51 , no. 1, pp. 79-85, January 2003.


K. Lakovic, J. Villasenor, "On Design of Error-Correcting Reversible Variable Length Codes," IEEE Communication Letters, vol. 6, no. 8, pp. 337-339, Aug. 2002.


Jiangtao Wen, John Villasenor, "Soft-Input Soft-Output Decoding of Variable Length Codes," IEEE Transactions on Communications, vol. 50, no. 5, pp. 689-692, May 2002.


Garcia-Frias and J. Villasenor, "Turbo decoding of Gilbert-Elliot channels," IEEE Transactions on Communications, vol. 50, no.3, pp. 357-363, Mar. 2002.


Garcia-Frias and J. Villasenor, "Joint Turbo Decoding and Estimation of Hidden Markov Sources," IEEE Journal on Selected Areas in Communications, vol. 19, no. 9, pp. 1671-1679, Sep. 2001.


S. Saha, M. Jamtgaard and John Villasenor, "Bringing the wireless internet to mobile devices," Computer, vol. 34, no.6, pp.54-58, Jun. 2001.


D. Lau, A. Schneider, M.D. Ercegovac and John Villasenor, "A FPGA-based library for on-line signal processing," Journal of VLSI Signal Processing Systems for Signal, Image, and Video Technology, vol. 28, no. 1-2, pp. 129-143, May-Jun. 2000.


J. Wen, M.Luttrell and John Villasenor, "Trellis-based R-D optimal quantization in H.263+," IEEE Transactions on Image Processing, vol. 9, no. 8, pp. 1431-1434, Aug. 2000.


Judy Y. Liao and John Villasenor, "Adaptive Intra Block Update for Robust Transmission of H.263," IEEE Transactions on Circuits and Systems for Video Technology, vol. 10, no. 1, pp. 30-35, Feb. 2000.


John Villasenor, Ya-Qin Zhang, and Jiangtao Wen, "Robust Video Coding Algorithms and Systems," Proceedings of the IEEE, vol. 87, no. 10, pp. 1724-1733, Oct. 1999.


Jiangtao Wen and John Villasenor, "Structured Prefix Codes for Quantized Low-Shape-Parameters Generalized Gaussian Sources," IEEE Transactions on Information Theory, vol. 45, no. 4, pp. 1307-1314, May 1999.


John Villasenor and Brad Hutchings, "The Flexibility of Configurable Computing," IEEE Signal Processing Magazine, vol. 15, no. 5, pp. 67-84, Sep. 1998.


J. Garcia-Frias and John Villasenor, "Turbo Decoders for Markov Channels," IEEE Communications Letters, vol. 2, no. 9, pp. 257-259, Sep. 1998.


Kang-Ngee Chia, Hea Joung Kim, Shane Lansing, William Mangione-Smith, and John Villasenor, "High-Performance Automatic Target Recognition Through Data-Specific VLSI," IEEE Transactions on Very Large Scale Integration Systems, vol. 6, no. 3, pp. 364-371, Sep. 1998.


Niko Faerber, Bernd Girod, and John Villasenor, "Extensions of ITU-T Recommendation of H.324 for Error-Resilient Video Transmission," IEEE Communications Magazine, vol. 36, pp. 120-128, Jun. 1998.


B. Belzer and J.D. Villasenor, "Symmetric Trellis Coded Vector Quantization," IEEE Transactions on Communications, vol. 45, no. 11, pp. 1354-1357, Nov. 1997.


A. Watson, G. Yang, J. Solomon, and J. Villasenor, "Visibility of Wavelet Quantization Noise," IEEE Transactions on Image Processing, vol. 6, no.8, pp 1164-1175, Aug. 1997.


J. Garcia-Frias and J.D. Villasenor, "Combining Hidden Markov Source Models and Parallel Concatenated Codes," IEEE Communications Letters, vol. 1, no. 4, pp. 111-113, Jul. 1997.


A. Lientz and J. D. Villasenor, "Very Low Variable Rate Convolutional Codes for Unequal Error Protection in DS-CDMA Systems," IEEE Transactions on Communications, vol. 45, no. 7, pp. 753-755, Jul. 1997.


J. Villasenor and W.H. Mangione-Smith, "Configurable Computing," Scientific American, pp. 66-71, Jun. 1997.


F. Chen, Z. Gao, and J. D. Villasenor, "Lattice Vector Quantization of Generalized Gaussian Sources," IEEE Transactions on Information Theory, vol. 43, pp. 92-103, Jan. 1997.


M. J. Tsai, J. Villasenor, and F. Chen, "Stack-run Image Coding," IEEE Transactions on Circuits and Systems for Video Technology, vol. 6, pp. 519-521, Oct. 1996.


A.B. Watson, G.Y. Yang, J.A. Soloman, J. Villasenor, "Visual Thresholds for Wavelet Quantization Error," Proceedings of the SPIE - The International Society for Optical Engineering, vol. 2657, pp. 382-392, 1996.


A. Alwan, R. Bagrodia, N. Bamos, M. Gerla, L. Kleinrock, J. Short, J. Villasenor, "Adaptive Mobile Multimedia Networks," IEEE Personal Communications, vol. 3, no. 2, pp. 34-51, Apr. 1996.


J. Villasenor, C. Jones, and B. Schoner, "Video Communications using Rapidly Reconfigurable Hardware,"
IEEE Transactions on Circuits and Systems for Video Technology, vol. 5, pp. 565-567, Dec. 1995.


Z. Gao, F. Chen, B. Belzer, and J. Villasenor, "A Comparison of the Z, E8, and Leech Lattices for Quantization of Low-shape-parameter Generalized Gaussian Sources," IEEE Signal Processing Letters, vol. 2, pp. 197-199, Oct. 1995.


J. Villasenor, B. Belzer, J. Liao, "Wavelet Filter Evaluation for Image Compression," IEEE Transactions on Image Processing, vol. 2, pp. 1053-1060, Aug. 1995.


J. Villasenor, "Tomographic Image Compression using Multidimensional Transforms," The Journal of Information Processing and Management, vol. 30, pp. 817-824, 1994.


J. Villasenor, "Alternatives to the Discrete Cosine Transform for Irreversible Tomographic Image Compression," IEEE Transactions on Medical Imaging, vol. 12, pp. 803-812, 1993.


R.N. Bracewell, O. Buneman, H. Hao, and J. Villasenor, "Fast Two-Dimensional Hartley Transform," Proceedings of the IEEE, vol. 74, no. 9, pp. 1282-1283, 1986.