Sheryl Howard

Contact:

• Teaching

• Research Interests

• Publications

Teaching:

• EE 188 - Electrical Engineering I (Circuits)
• EE 526 - Random Signals and Systems

• My Spring 2011 Schedule

Fall 2010:

• EE 110 - Digital Logic
• EE 430 - Communications Systems

• My Fall 2010 Schedule

Spring 2010:

• EE490/599 - Topics in Communication Systems
• EE348 - Signals and Systems

Fall 2009:

• EE435/EE535 - Error-Correcting Codes
• EE110L - Digital Logic Labs

Spring 2009:

• EE 188 - Electrical Engineering I
• EE 430 - Communications Systems

• My Spring 2009 Schedule

Fall 2008:

• EE 110 - Digital Logic
• EE 599-2 - Random Signals and Systems

• My Fall 2008 Schedule

• EE 348 - Signals and Systems
• EE 430 - Communications Systems

• My Spring 2008 Schedule

Fall 2007:

• EE 110 - Digital Logic
• EE 490-1/EE 599-2 - Error-Correcting Codes

• My Fall 2007 Schedule

Spring 2007: EE 348 - Signals and Systems
Spring 2007 Office Hours: Engineering (bldg 69), Rm 261

M:	9:00 - 10:30 AM (in lab); 2:00 - 3:30 PM;	Th:	2:30 - 4:00 PM;

Unless otherwise posted, I will be in my office during office hours and available for consultation. If you have a question but are unable to attend any of my office hours, please contact me at sheryl.howard@nau.edu to make an appointment to see me.
Open-Door Policy: If my office door is open, feel free to drop by outside of office hours. However, if my office door is closed, I am not available for questions.

Fall 2006: EE 110 - Introduction to Digital Logic
Quine-McCluskey Links:
www.embedded.com
Wikipedia
EE 110: Proof of DeMorgan's Theorems

Research Interests:

Masters Students:

• Congduan Li: Progressive Coding in Wireless Sensor Line Networks.
  MSE Thesis Defense expected May 2011. Co-advised with Paul Flikkema, EE Dept., NAU
• Rui Chen: ''Transmission Censoring with Combined Source-Channel Decoding for Energy Efficiency in Correlated Sensing Networks.''
  MSE, July 2010.
• Fauzia Ahmed: ''Energy Efficient Wireless Sensor Networks Using Unequal Error Protection.''
  MSE, July 2010.
• Autumn von Flotow: ''Efficacy Measures for Reduced Codespace.''
  M.S. Mathematics, July 2010. Co-advised with Janet McShane, Mathematics Dept., NAU.

Publications:

• C. Winstead, S.S. Tehrani, W.J. Gross, S. Mannor, S.L. Howard and V.C. Gaudet, ``Relaxation Dynamics in Stochastic Iterative Decoders,'' accepted for publication by IEEE Transactions on Signal Processing in July 2010, in press, publication date November or December 2010.
• C. Winstead and S.L. Howard, ``A Probabilistic LDPC-Coded Fault Compensation Technique for Reliable Nano-Scale Computing,'' IEEE Transactions on Circuits and Systems II, vol. 56, no. 6, June 2009, pp. 484 - 488.
• T. Brandon, R. Hang, G. Block, V.C. Gaudet, B. Cockburn, S. Howard, C. Giasson, K. Boyle, P. Goud, S.S. Zeinoddin, A. Rapley, S. Bates, D. Elliott and C. Schlegel, ``A Scalable LDPC Decoder ASIC Architecture with Bit-Serial Message Exchange'', Integration, the VLSI Journal, vol. 41, no. 3, May 2008, pp. 385-398.
• S. Howard, C. Schlegel and V. Gaudet, "Degree-Matched Check Node Decoding for Regular and Irregular LDPCs", IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 53, issue 10, October 2006, 5 pgs.
• S. Howard and C. Schlegel, "Differential Turbo Coded Modulation with APP Channel Estimation", IEEE Trans. Communications, August 2006, pp. 1397-1406.
• S. Howard, K. Iniewski and C. Schlegel, "Error Control Coding in Low-Power Wireless Sensor Networks: When is ECC Energy-Efficient?", EURASIP Journal of Wireless Communications and Networking, Special Issue: CMOS RF Circuits for Wireless Applications", Vol 2006, Issue 2 (April 2006), Article ID 74812, 14 pages.
• S. Howard, V. Gaudet and C. Schlegel, "Soft-Bit Decoding of Regular Low-Density Parity-Check Codes", IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 52, issue 10, October 2005, pp. 646-650.
• T. Brandon, R. Hang, G. Block, V.C. Gaudet, B. Cockburn, S. Howard, C. Giasson, K. Boyle, P. Goud, S.S. Zeinoddin, A. Rapley, S. Bates, D. Elliott and C. Schlegel, ``A Scalable LDPC Decoder ASIC Architecture with Bit-Serial Message Exchange'', Elsevier: Integration, the VLSI Journal, vol. 41, no. 3, May 2008, pp. 385-398.

• S. Howard and K. Iniewski, ''Chapter 6: Error-Correcting Codes for In-Vivo RF Wireless Links,'' VLSI Circuits for the Human Body, Artech House, 2008.
• S. Howard and C. Schlegel, ``Belief Propagation,'' in Trellis and Turbo Coding by C. Schlegel and L. Pérez, IEEE Press, 2003.

• S. Howard and P. Flikkema, ``Progressive Joint Coding, Estimation and Transmission Censoring in Energy-Centric Wireless Data Gathering Networks,'' 5th IEEE International Conference on Mobile Ad Hoc and Sensor Systems (MASS) 2008, Atlanta, GA, Sept. 29 - Oct. 2, 2008, pp. 485-490.
• S. Howard and P. Flikkema, ``Integrated Source-Channel Decoding for Correlated Data-Gathering Sensor Networks'', Proceedings of IEEE Wireless Communications and Networking Conference (WCNC) 2008, Las Vegas, NV, Mar. 31 - Apr. 3, 2008, pp. 1261-1266.
• S. Howard, C. Schlegel and V. Gaudet, "A Degree-Matched Check Node Approximation for LDPC Decoding", Proc. Int. Symp. Information Theory (ISIT) 2005, Adelaide, Australia, Sept. 4-9, 2005.
• S. Howard, S. Zeinoddin, C. Schlegel and V. Gaudet, "Short-Cycle-Free Interleaver Design for Increasing Minimum Squared Euclidean Distance", Proc. of ISIT 2004, Chicago, IL, June 27-July 2, 2004.
• S. Howard and C. Schlegel, "Differentially-Encoded Turbo Coded Modulation with APP Channel Estimation", Proc. GlobeCom 2003, San Francisco, CA, Dec. 1-5, 2003; errata: Pg. 5, random walk phase variance=0.05 deg², not rad².
• S. Howard, C. Schlegel, L. Pérez, F. Jiang, "Differential Turbo Coded Modulation over Unsynchronized Channels", Proc. of WOC 2002, Banff, AB, Canada, July 2002.

• S. Howard and P. Flikkema, "Coded Compressive Estimation in Environmental Sensor Networks", invited talk at SAMSI Environmental Sensor Networks: Progress and Challenges Workshop, Research Triangle Park, NC, October 21, 2008.
• S. Howard, ``Combined Source-Channel Decoding and Transmission Censoring for Power Reduction in a Wireless Sensor Network,'' 2008 International Analog Decoding Workshop, Logan, UT, July 12, 2008.
• S. Howard, ``Energy Efficiency of Error-Correcting Coding in Wireless Sensor Networks,'' invited talk at 2nd Annual CMOS Emerging Technologies Workshop 2007, Whistler, BC, Canada, July 11-13, 2007.
• S. Howard and C. Schlegel, ``Combined Iterative Estimation/Decoding for Differential Turbo-Coded Modulation,'' 5th Annual Analog Decoding Workshop 2007, Montreal, Quebec, Canada, May 24-25, 2007.
• C. Winstead and S. Howard, ``Hysteresis Techniques for Stochastic Decoders,'' 5th Annual Analog Decoding Workshop 2007, Montreal, Quebec, Canada, May 24-25, 2007.
• "Two New LDPC Decoding Algorithms: Soft-Bit Decoding and Sub-Min-Sum Decoding", S. Howard, T. Rapley, C. Schlegel and V. Gaudet, slides from 3rd Annual Analog Decoding Workshop, Banff, AB, Canada, June 8-9, 2004

• Rui Chen, ``Transmission Censoring with Combined Source-Channel Decoding for Energy Efficiency in Correlated Sensing Networks,'' Science Foundation Arizona Grand Challenges Conference 2010, Phoenix, AZ, April 12-13, 2010.
• Rui Chen and Saiyi Wang, ``Energy Efficiency in Environmental Sensing Networks: Dynamic Reporting and Transmission Censoring: Cross-Layer Approaches,'' Science Foundation Arizona Grand Challenge Summit, Biosphere 2, March 27-29, 2009.
• Forrest Schwyn, ''Wireless Message Censoring Generalization and Streamlining,'' NAU CEFNS Celebration of Undergraduate Research and Design, April 23, 2009.
• Xiangmiao Yuan, ''Combined Iterative Decoding and Synchronization in Repeat-Accumulate Codes,'' NAU CENS Celebration of Undergraduate Research and Design, April 18, 2008.