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Jon Hamkins, Supervisor
Jon.Hamkins@jpl.nasa.gov

Picture of Jon Hamkins
Jet Propulsion Laboratory
Mail Stop 238-420
4800 Oak Grove Drive
Pasadena, CA 91109-8099

Jon joined the Jet Propulsion Laboratory in 1996. Since 2001, he has been the technical supervisor of the Information Processing Group at JPL, a group of about fifteen postdoctoral researchers with interests in information theory, channel coding, source coding, synchronization, networking, optical communications, and mission support.

Jon has led the group into several new areas of research. In optical communications, he developed new analytical tools to express and compute channel capacity and new coding and modulation schemes with near-capacity performance. He leads a team that is developing and implementing a 50 Mbps decoder for these codes, to support the optical link of NASA's Mars Telesat Orbiter mission.

He initiated and leads a program of new research in autonomous radio receivers. With this technology, a receiver can autonomously detect and process a signal without being told its data rate, modulation type, or other characteristics. This is important for ground stations and deep-space communications relays, which can be cumbersome to frequently reconfigure manually.

Jon's group has also broken ground in several other research areas. It invented, developed, and implemented the ICER image compression algorithm being used by the Mars Exploration Rovers, and continues to provide leadership in data compression to missions and standards bodies. It also developed a new family of low-density parity-check (LDPC) codes with unparalleled power-efficiency and encoding/decoding simplicity, and proposed them for standardarization to the Consultative Committee for Space Data Systems. The group also provides expertise in analysis and link optimization of systems using Ka-band frequencies.

Jon is a Senior Member of the IEEE, and has been awarded several NASA Tech Briefs for innovations in signal processing, coding theory, and optical communications. He received an award for technical excellence for his participation in the Huygens Recovery Task Force, which corrected a critical error in the design of the Cassini-Huygens receiver. He has taught in the Deep Space Optical Communications course at JPL.

Current Projects

Decoder Assembly for the Mars Laser Communications Demonstration (Cog-E)
Optical Coding and Modulation Design (PI)
Autonomous radios for Proximity Links and IPN Nodes (PI)
Autonomous radios for Mars Exploration (PI)
Channel Code Design for Deep Space and In Situ Links

Education

B.S. with honors, Electrical Engineering, California Institute of Technology, 1990
M.S., Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 1993
Ph.D., Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 1996

Publications

Journal Papers

  1. M. Barsoum, M. Fitz, B. Moision, D. Divsalar, and J. Hamkins, “Iterative Codes for Deep-Space Optical Communications,” IEEE Transactions on Communications, submitted December 22, 2006. [pdf]
  2. M. Cheng, M. Nakashima, B. Moision, and J. Hamkins “Optimizations of a Hardware Decoder for Deep-Space Optical Communications,” IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, vol. 55, no. 2, March 2008 p. 644 - 658. [pdf]
  3. K. Andrews, D. Divsalar, S. Dolinar, J. Hamkins, C. Jones, and F. Pollara, “The Development of Turbo and LDPC Codes for Deep Space Applications,” Proceedings of the IEEE, Special Issue on “Technical Advances in Deep Space Communications and Tracking,” vol. 95, no. 11, Nov. 2007 p. 2142 - 2156. [pdf]
  4. A. Biswas, B. Moision, W. Roberts, W. Farr, A. Gray, K. Quirk, J. Hamkins, M. Cheng, J. Gin, M. Nakashima, G. Ortiz, S. Piazzolla, C. Liebe, D. Losh, “Palamar Receive Terminal (PRT) for the Mars Laser Communication Demonstration (MLCD) Project,” Proceedings of the IEEE, Special Issue on Technical Advances in Deep Space Communications and Tracking, vol. 95, no. 30, October 2007, p. 2045-2058. [pdf]
  5. B. Moision, J. Hamkins, “Error rate bounds for coded PPM on the Poisson channel”, IEEE Transactions on Communications, submitted, September 20, 2005. [pdf]
  6. J. Hamkins, “Accurate Computation of the Performance of M-ary Orthogonal Signaling on a Discrete Memoryless Channel”, IEEE Transactions on Communications, vol. 52, no. 11, November 2004, p. 1844-1845. [html] [ps] [ps.gz] [pdf] [pdf.gz] [abstract]
  7. J. Hamkins and K. Zeger, “Gaussian Source Coding with Spherical Codes”, IEEE Transactions on Information Theory, vol. 48, no. 11, November 2002, p. 2980-2989. [html] [ps] [ps.gz] [pdf] [pdf.gz] [abstract]
  8. J. Hamkins, "An analytic technique to separate cochannel FM signals”, IEEE Transactions on Communications, vol. 48, no. 4, April 2000, p. 543-546. [html] [ps] [ps.gz] [pdf] [pdf.gz]
  9. J. Hamkins and K. Zeger, “Asymptotically Dense Spherical Codes---Part I: Wrapped Spherical Codes”, IEEE Transactions on Information Theory, vol. 43, no. 6, November 1997, p. 1774-1785. [ps] [ps.gz] [pdf] [pdf.gz] Erratum: [html], [ps] [ps.gz] [pdf] [pdf.gz]
  10. J. Hamkins and K. Zeger, “Asymptotically Dense Spherical Codes---Part II: Laminated Spherical Codes”, IEEE Transactions on Information Theory, vol. 43, no. 6, November 1997, 1786-1798. [ps] [ps.gz] [pdf] [pdf.gz]
  11. J. Hamkins and K. Zeger, “Improved Bounds on Maximum Size Binary Radar Arrays”, IEEE Transactions on Information Theory, vol. 43, no. 3, May 1997, pp. 997-1000. [ps] [ps.gz] [pdf]

Books and Book Chapters

  1. B. Moision, J. Hamkins, “Coding and Modulation for Free Space Optical Communications,” Chapter in: Near-Earth Optical Communications, Hamid Hemmati, ed., in press. [pdf]
  2. J. Hamkins “Pulse Position Modulation,” Chapter 37 in: The Handbook of Computer Networks, Hossein Bidgoli, ed., John Wiley & Sons, Inc., 2008. [pdf]
  3. J. Hamkins, M. Simon, eds., Autonomous Software-Defined Radio Receivers for Deep Space Applications, Deep Space Communications and Navigation Series, John Wiley & Sons, 2006. [pdf] [pdf.gz]
  4. S. Dolinar, J. Hamkins, B. Moision, and V. Vilnrotter, “Optical Modulation and Coding,” Chapter 4 in: Deep-Space Optical Communications, Hamid Hemmati, ed., Deep Space Communications and Navigation Series, John Wiley & Sons. Chapter 4: [pdf] [pdf.gz] Full book: [pdf] [pdf.gz]

Conference Papers

  1. K. Andrews, D. Divsalar, S. Dolinar, J. Hamkins, F. Pollara, “Design and Standardization of Low-Density Parity-Check Codes for Space Applications,” SpaceOps, Heidelberg, Germany, May 12-16, 2008. [pdf], [presentation]
  2. J. Hamkins, L. Deutsch, D. Divsalar, S. Dolinar, D. Lee, F. Stocklin, J. Wesdock, C. Patel, “Formulation of Coding Recommendations for Future NASA Space Communications,” Aerospace Conference, Big Sky, Montana, March 1-8, 2008. [pdf]
  3. F. Stocklin, L. Deutsch, G. Noreen, J. Hamkins, D. Lee, J. Wesdock, C. Patel, “Formulation of Modulation Recommendations for Future NASA Space Communications,” Aerospace Conference, Big Sky, Montana, March 1-8, 2008. [pdf]
  4. L. Deutsch, G. Noreen, J. Hamkins, J. Wesdock, F. Stocklin, D. Zillig, “Selecting Codes, Modulations, Multiple Access Schemes, and Link Protocols for Future NASA Missions,” Aerospace Conference, Big Sky, Montana, March 1-8, 2008. [pdf]
  5. M. Barsoum, B. Moision, M. Fitz, D. Divsalar, J. Hamkins “Iterative Coded Pulse-Position-Modulation for Deep-Space Optical Communications,“ ITW, Lake Tahoe, California, Sep. 2-6 2007. [pdf]
  6. J. Hamkins, “Autonomous Receiver Configuration,” NASA Science Technology Conference, College Park, Maryland, June 19-21, 2007. [pdf]
  7. M. Cheng, B. Moision, J. Hamkins, and M. Nakashima, “Implementation of a Coded Modulation for Deep Space Optical Communications,” Globecom 2006, San Fracisco, CA, Nov.-Dec. 2006, submitted. [pdf] [pdf.gz]
  8. J. Hamkins, “Modulation Classification of MPSK for Space Applications,” Globecom 2006, San Fracisco, CA, Nov.-Dec. 2006, submitted. [pdf] [pdf.gz]
  9. B. Moision, J. Hamkins, et al (TBD) Title to be determined, SPIE, University of California at San Diego, Aug. 13-17, 2006, submitted. [abstract]
  10. M. Cheng, B. Moision, J. Hamkins, M. Nakashima, “Implementation of a Coded Modulation for Deep Space Optical Communications”, Information Theory and Applications, University of California at San Diego, Feb. 6-10, 2006 to appear. [pdf] [pdf.gz]
  11. B. Moision, J. Hamkins, M. Cheng, “Design of a Coded Modulation for Deep Space Optical Communications”, Information Theory and Applications, University of California at San Diego, Feb. 6-10, 2006 to appear. [pdf] [pdf.gz]
  12. D. Antsos, V. P. Cable, D. Divsalar, E. R. Grigorian, J. Hamkins, H. Hemmati, T. C. Jedrey, C. R. Jones, N. E. Lay, R. J. Pogorzelski, C. S. Racho, E. H. Satorius, B. N. Shah, S. Shambayati, J. Venkatesan, M. Wang, A. J. Jensen, R. L. Lovestead, O. Bruno, M. C. Haslam, R. Paffenroth, W. B. Kuhn, J. T. Fieler, R. E Hunter Jr., D. Merz, D. Nobbe, W. E. Ryan, W. E. Stark “Mars Technology Program (MTP) Communications and Tracking Technologies for Mars Exploration”, 2006 IEEE Aerospace Conference, Big Sky, Montana, March 3-11, 2006, to appear. [pdf] [pdf.gz]
  13. M. Cheng, B. Moision, J. Hamkins, M. Nakashima, “An Interleaver Implementation for the Serially Concatenated Pulse-Position Modulation Decoder”, 2006 IEEE International Symposium on Circuits and Systems, Island of Kos, Greece, May 21-24, 2006, submitted. [pdf] [pdf.gz]
  14. B. Moision, M. Srinivasan, J. Hamkins, “The Blocking Probability of Geiger-Mode Avalanche Photodiodes”, Satellite Data Compression, Communications, and Archiving Conference, Optics & Photonics 2005, San Diego, CA, Vol. 5889, p. 137-146, July-August 2005 (invited). [pdf] [pdf.gz]
  15. M. Cheng, M. Nakashima, J. Hamkins, B. Moision and M. Barsoum, “A decoder architecture for high-speed free-space laser communications”, Proceedings of SPIE, Free-Space Laser Communication Technologies XVII, San Jose, CA, Vol. 5712, p. 174-185, January 2005. [pdf] [pdf.gz] presentation: [pdf] [pdf.gz]
  16. J. Hamkins, B. Moision, “Multipulse PPM on Memoryless Channels,”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), Chicago, IL, p. 335, June-July 2004. [pdf] [pdf.gz]
  17. J. Hamkins, M. Klimesh, R.J. McEliece, B. Moision, “Capacity of the Generalized PPM channel”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), Chicago, IL, p. 334, June-July 2004. [pdf] [pdf.gz]
  18. J. K.-S. Lee, B. Lee, J. Thorpe, K. Andrews, S. Dolinar, J. Hamkins, “A Scalable Architecture of a Structured LDPC Decoder”, Proceedings of the IEEE International Symposium on Information Theory (ISIT),, Chicago, IL, p. 292, June-July 2004. [pdf] [pdf.gz]
  19. J. Hamkins, B. Moision, “Selection of modulation and codes for deep space optical communications”, Proceedings of SPIE, Free-Space Laser Communication Technologies XIV, San Jose, CA, Vol. 5338, p. 123-130, January, 2004. [ps] [ps.gz] [pdf] [pdf.gz]
  20. J. Hamkins, D. Divsalar, “Coupled Receiver-Decoders for Low Rate Turbo Codes”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), Yokohama, Japan, p. 381, June 2003. [html], [ps.gz] [pdf] [pdf.gz]
  21. B. Moision, J. Hamkins, “Low complexity serially concatenated coding for the deep space optical channel,”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), Yokohama, Japan, p. 100, June 2003. [ps] [ps.gz] [pdf] [pdf.gz]
  22. J. Hamkins, “Power and Bandwidth Efficient Coded Modulation for Very High Data Rates”, NASA Space Communications Symposium, September 19, 2002.
  23. B. Moision, J. Hamkins, “Constrained Coding for the Deep-Space Optical Channel,”, Proceedings of SPIE, Free-Space Laser Communication Technologies XIV, San Jose, CA, Vol. 4635, p. 127-137, January 21-22, 2002.
  24. J. Hamkins, “Power and Bandwidth Efficient Coded Modulation for Very High Data Rate”, Workshop on Emerging Communications, Networks and Architectures Technoloies for NASA Enterprises, Cleveland, OH, August 7, 2001.
  25. J. Hamkins, K. Zeger, “Optimal Rate Allocation for Shape-Gain Gaussian Quantizers”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), Washington, DC, p. 182, June 2001. [ps] [ps.gz] [pdf] [pdf.gz] presentation: [ps] [ps.gz] [pdf] [pdf.gz]
  26. A. Biswas, J. Ceniceros, B. Madden-Woods, J. Hamkins, M. Srinivasan, “Laboratory characterization of near infra-red (NIR) enhanced silicon avalanche photodiodes for pulse position modulation (PPM) detection”, Proceedings of SPIE, Free-Space Laser Communication Technologies XIII, San Jose, CA, Vol. 4272, p. 133-141, January 24-25, 2001.
  27. J. Hamkins, S. Dolinar, D. Divsalar, “Capacity and Capacity Sensitivity of Soft Output Optical Channels”, Proceedings of SPIE, Free-Space Laser Communication Technologies XIII, San Jose, CA, Vol. 4272, p. 170-180, January 24-25, 2001.
  28. S. Dolinar, D. Divsalar, J. Hamkins, and F. Pollara, “Capacity of PPM on APD-detected Optical Channels”, Proceedings of MILCOM 2000, October 22-25, 2000. [ps] [ps.gz] [pdf] presentation: [ps]
  29. S. Dolinar, D. Divsalar, J. Hamkins, and F. Pollara, “Capacity of PPM on Gaussian and Webb Channels”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), June 2000, to appear. [html], [ps] [ps.gz] [pdf]
  30. J. Hamkins and J. Ceniceros, “The Capacity of Avalanche Photodiode-Detected Pulse Position Modulation”, Proceedings of SPIE, Free-Space Laser Communication Technologies XII, San Jose, CA, Vol. 3932, p. 90-101, January 24, 2000. [html] [ps] [ps.gz] [pdf]
  31. J. Hamkins and M. Srinivasan, “Turbo Codes for APD-Detected PPM”, Proceedings of the Thirty-Sixth Annual Allerton Conference on Cummunication, Control and Computing, September 23-25, 1998, p. 29-38. [ps] [ps.gz] [pdf]
  32. J. Hamkins, “A Joint Viterbi Algorithm to Separate Cochannel FM Signals”, International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 6, 1998, p. 3297-3300. [ps] [ps.gz] [pdf]
  33. J. Hamkins, “Cochannel FM Signal Separation”, Information Theory Workshop, February 8, 1998. [ps] [ps.gz]
  34. J. Hamkins and K. Zeger, “Improved Bounds on Maximum Size Binary Radar Arrays”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), June 1997, p. 518. [ps] [ps.gz] [pdf]
  35. J. Hamkins and K. Zeger, “Structured Spherical Codes for Gaussian Quantization”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), June 1997, p. 62. [ps] [ps.gz] [pdf]
  36. J. Hamkins and E. Satorius, “A Comparative Study of Co-Channel Interference Suppression Techniques”, Proceedings of the Fifth International Mobile Satellite Conference (IMSC), June 1997, p. 327-332. [ps] [ps.gz]
  37. K. Angkasa, J. Hamkins, N. Lay, E. Satorius, and A. Zevallos,, “A Real-Time Testbed for Satellite and Terrestrial Communications Experimentation and Development”, Proceedings of the Fifth International Mobile Satellite Conference (IMSC), June 1997, p. 491-496.
  38. J. Hamkins and K. Zeger, “Wrapped Spherical Codes”, [abstract] Proceedings of the 30th Annual Conference on Information Sciences and Systems (CISS), Princeton University, New Jersey, March 1996.
  39. J. Hamkins and K. Zeger, “Asymptotically Optimal Spherical Codes”, Proceedings of the IEEE International Symposium on Information Theory (ISIT), September 1995, p. 184. [ps] [ps.gz] [pdf]
  40. J. Hamkins and K. Zeger, “Asymptotically Optimal Spherical Codes”, [html] Proceedings of the 29th Annual Conference on Information Sciences and Systems (CISS), Johns Hopkins University, Maryland, March 1995, p. 52-57, [ps] [ps.gz]
  41. J. Hamkins and D. J. Brown, “Switchbox Routing with Movable Terminals”, Proceedings of the Third Great Lakes Symposium on VLSI (GLSVLSI), Feb. 1993, p. 57-61. [ps] [ps.gz] [pdf]
  42. J. Hamkins and D. J. Brown, “Routing in a Rectangle with k-ary Overlap”, Proceedings of the Second Great Lakes Symposium on VLSI (GLSVLSI), Feb. 1992, p. 144-151. [ps] [ps.gz] [pdf]

Patents

  1. J. Hamkins, M. Simon, D. Divsalar, S. Dolinar, “Self Configurable Radio Receiver,” filed Sep. 18, 2006.

NASA Tech Briefs

  1. B. Moision, J. Hamkins, “Error rate bounds for coded PPM on the Poisson channel”, NASA Tech Briefs, to appear (submitted 2006).
  2. B. Moision, J. Hamkins, M. Barsoum, M. Cheng, M. Nakashima, "Hardware Implementation of Serially Concatenated PPM Decoder," NASA Tech Briefs, to appear (submitted 2005). [pdf]
  3. J. Hamkins, B. Moision, “Error Rates and Channel Capacities in Multiple Pulse Position Modulation”, NASA Tech Briefs, Nov. 2007. [pdf]
  4. J. Hamkins, M. Simon, D. Divsalar, S. Dolinar, “Architecture of an Autonomous Radio Receiver”, NASA Tech Briefs, June 2007. [pdf]
  5. J. Hamkins, “Less-Complex Method of Classifying MPSK,” NASA Tech Briefs, Sep. 2006. [pdf]
  6. B. Moision, J. Hamkins, “Optimizing Parameters for Deep-Space Optical Communication”, NASA Tech Briefs, p. 62, April 2005. [html] [ps] [ps.gz] [pdf] [pdf.gz]
  7. J. Hamkins, D. Divsalar, “Coupled Receiver/Decoders for Low-Rate Turbo Codes”, NASA Tech Briefs, p. 26, March 2005. [html] [ps] [ps.gz] [pdf] [pdf.gz]
  8. B. Moision, J. Hamkins, “Coding for Communication Channels With Dead-Time Constraints”, NASA Tech Briefs, June 2004. [html] [ps] [ps.gz] [pdf] [pdf.gz]
  9. J. Hamkins, “Analytic Technique for Separation of Cochannel FM Signals”, NASA Tech Briefs, March 2000. [html], [ps], [ps.gz], [pdf], [pdf.gz],

Inter-Planetary Network Progress Reports (JPL technical journal)

  1. M. K. Cheng, M. A. Nakashima, B. E. Moision, and J. Hamkins, “Optimizations of a Turbo-Like Decoder for Deep-Space Optical Communications,” The Interplanetary Network Progress Report, Vol. 42-168, Feb. 15, 2007, p. 1-31.
  2. J. Hamkins, M. Klimesh, R. McEliece, and B. Moision, "Capacity of the Generalized Pulse-Position Modulation Channel," The Interplanetary Network Progress Report, Vol. 42-164, Feb. 15, 2006, p. 1-6.
  3. B. Moision, J. Hamkins, “Coded Modulation for the Deep-Space Optical Channel: Serially Concatenated Pulse-Position Modulation”, The Interplanetary Network Progress Report, Vol. 42-161, May 15, 2005, p. 1-26. [pdf] [pdf.gz]
  4. B. Moision, J. Hamkins, “Reduced Complexity Decoding of Coded PPM Using Partial Statistics”, The Interplanetary Network Progress Report, Vol. 42-161, May 15, 2005, p. 1-20. [pdf] [pdf.gz]
  5. M. Cheng, M. Nakashima, J. Hamkins, B. Moision, M. Barsoum, “A Field-Programmable Gate Array Implementation of the Serially Concatenated Pulse-Position Modulation Decoder”, The Interplanetary Network Progress Report, Vol. 42-161, May 15, 2005, p. 1-15. [pdf] [pdf.gz]
  6. J. Hamkins, B. Moision, “Multipulse Pulse-Position Modulation on Discrete Memoryless Channels”, The Interplanetary Network Progress Report, Vol. 42-161, May 15, 2005, p. 1-13. [pdf] [pdf.gz]
  7. J. Hamkins, M. Simon, S. Dolinar, D. Divsalar, H. Shirani-Mehr, “An Overview of the Architecture of an Autonomous Radio”, The Interplanetary Network Progress Report, Vol. 42-159, Nov. 15, 2004, p. 1-14, to appear. [pdf] [pdf.gz]
  8. B. Moision, J. Hamkins, “Deep-Space Optical Communications Downlink Budget: Modulation and Coding”, The Interplanetary Network Progress Report, Vol. 42-154, August 15, 2003. [ps] [ps.gz] [pdf] [pdf.gz]
  9. B. Moision, J. Hamkins, “Constrained Coding for the the Deep-Space Optical Channel”, The Interplanetary Network Progress Report, Vol. 42-149, May 15, 2002. [ps] [ps.gz] [pdf] [pdf.gz]
  10. K. Andrews, D. Divsalar, S. Dolinar, J. Hamkins, F. Pollara, “Very High Speed Analog Decoders”, Internal JPL report, D-22054 August 24, 2001
    [ps], [ps.gz], [pdf]
  11. M. Srinivasan, J. Hamkins, B. Madden-Woods, A. Biswas, and J. Beebe, “Laboratory Characterization of Silicon Avalanche Photodiodes (APDs) for Pulse-Position Modulation (PPM) Detection”, The Interplanetary Network Progress Report, Vol. 42-146, August 15, 2001. [pdf] [pdf.gz]
  12. J. Hamkins, S. Dolinar, D. Divsalar, “Optical Channel Capacity Sensitivity”, The Telecommunications and Mission Operations Progress Report, Vol. 42-143, November 15, 2000. [html], [ps] [ps.gz] [pdf]
  13. S. Dolinar, D. Divsalar, J. Hamkins, and F. Pollara, “Capacity of Pulse-Position Modulation (PPM) on Gaussian and Webb Channels”, The Telecommunications and Mission Operations Progress Report, Vol. 42-142, August 15, 2000. [pdf]
  14. J. Hamkins, “A Joint Receiver-Decoder for Convolutionally Coded BPSK”, The Telecommunications and Mission Operations Progress Report, Vol. 42-139, November 15, 1999. [ps] [ps.gz] [pdf]
  15. J. Hamkins, “The Capacity of APD-detected PPM”, The Telecommunications and Mission Operations Progress Report, Vol. 42-138, August 15, 1999. [html], [ps] [ps.gz] [pdf]
  16. J. Hamkins, “Performance of Binary Turbo Coded 256-PPM”, The Telecommunications and Mission Operations Progress Report, Vol. 42-138, August 15, 1999. [ps] [ps.gz] [pdf]

Theses

  1. J. Hamkins, “Design and Analysis of Spherical Codes”, Ph.D. thesis, Univ. of Illinois at Urbana-Champaign, September, 1996. [ps] [ps.gz]
  2. J. Hamkins, “Routing in a Convex Grid with k-ary Overlap”, M.S. thesis, Univ. of Illinois at Urbana-Champaign, January, 1993. [ps] [ps.gz]

Technical Memoranda (JPL access only)

  1. J. Hamkins, K. Andrews, V. Vilnrotter, “Properties of ML Estimates“, JPL Interoffice Memorandum, October 31, 2007.
  2. J. Hamkins, “Modulation index estimation of M-PSK signals, without knowledge of modulation order, data rate, timing, SNR, and offset frequency,” April 20, 2007.
  3. J. Hamkins, “Soft network coding – preliminary ideas,” March 8, 2007.
  4. J. Hamkins, S. Dolinar, “Packet loss rate vs. codeword error rate and bit error-rate,” May 25, 2006.
  5. J. Hamkins, “Pipelining techniques for the MLCD decoder“, JPL Interoffice Memorandum 331.2004.12.002, December 22, 2004.
  6. B. Moision, J. Hamkins, “Partial Statistics Losses for MLCD“, JPL Interoffice Memorandum 331.2004.12.03, December 3, 2004.
  7. J. Hamkins, “Capacity of Multipulse PPM“, JPL Interoffice Memorandum 331.2004.12.001, December 1, 2004.
  8. J. Hamkins, “Summary of MLCD FPGA design comments“, JPL Interoffice Memorandum 331.2004.11.001, November 4, 2004.
  9. B. Moision, J. Hamkins, “Error rate bounds for coded PPM on the Poisson channel,“ JPL Interoffice Memorandum 331.2004.09.9, September 9, 2004.
  10. J. Hamkins, “Partitions of the (λs,λb) plane into codes“, JPL Interoffice Memorandum 331.2004.8.001, August 5, 2004.
  11. B. Moision, J. Hamkins, “Notes on union bounds for SCPPM codes on the Poisson channel,“ JPL Interoffice Memorandum 331.2004.1.1, August 4, 2004.
  12. B. Moision, J. Hamkins, “MLCD Operating Point Recommendation,“ JPL Interoffice Memorandum 331.2004.05.1, May 6, 2004.
  13. J. Hamkins, B. Moision, “Partitions of the (λs,λb) plane into codes”, JPL Interoffice Memorandum 331.2004.3.002, March 18, 2004. [html], [ps], [ps.gz], [pdf], [pdf.gz]
  14. B. Moision, M. Srinivasan, J. Hamkins, "Blocking probability of a PPM modulated Geiger mode APD", JPL Interoffice Memorandum 331.2004.2.001, February 12, 2004. [html], [ps], [ps.gz], [pdf] [pdf.gz]
  15. J. Hamkins, "The number of ways to distribute h ones into m bins of size l where each bin contains at least one one" JPL Interoffice Memorandum , February 10, 2004.
  16. J. Hamkins, "Code and Modulation Recommendation for MLCD", JPL Interoffice Memorandum, 331.2004.1.001, January 30, 2004.
  17. J. Hamkins, "Follow-up Comments to Marv's Comments on the Eigenvalue Classifier", JPL Interoffice Memorandum 331.2004.1.004, January 8, 2004. [html], [ps], [ps.gz], [pdf] [pdf.gz]
  18. J. Hamkins, "A Fast Implementation of Maximum-Likelihood Modulation Classification", JPL Interoffice Memorandum 331.2004.1.002, January 16, 2004, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  19. B. Moision, M. Srinivasan, J. Hamkins, "Output Statistics of Geiger Mode APD array", January 30, 2004, JPL Interoffice Memorandum 331.2004.1.002, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  20. M. Srinivasan, J. Hamkins, "Output Statistics of Geiger Mode APD array", January 25, 2004, JPL Interoffice Memorandum,
  21. J. Hamkins, B. Moision, "MLCD Decoder Requirements", JPL Interoffice Memorandum 331.2004.1.001, January 30, 2004, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  22. J. Hamkins, "Noncoherent BPSK/QPSK Modulation Classifiers", December 30, 2003, JPL Interoffice Memorandum 331.2003.12.001, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  23. J. Hamkins, "Optimal Classifier Probability of Error for Noiseless M-PSK Signals", November 14, 2003, JPL Interoffice Memorandum 331.2003.11.001,
  24. J. Hamkins, and LDPC code design team, "Comments on 'Considerations for a CCSDS Coding Recommendation'", JPL Interoffice Memorandum 331.2003.10.002, October 30, 2003, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  25. J. Hamkins, M. Klimesh, R.J. McEliece, B. Moision, "Monotonicity of PPM Capacity", JPL Interoffice Memorandum 331.2003.10.001, October 21, 2003. [html], [ps], [ps.gz], [pdf] [pdf.gz]
  26. J. Hamkins, R.J. McEliece, B. Moision, "Capacity of a memoryless channel whose input alphabet is a transitive G-set", JPL Interoffice Memorandum 331B.2003.04, October 1, 2003.
  27. J. Hamkins, "Monotonicity of PPM Capacity in M (incomplete proof)", August 26, 2003, JPL Interoffice Memorandum,
  28. J. Hamkins, "Uniform Distribution Achieves Capacity", August 26, 2003, JPL Interoffice Memorandum,
  29. J. Hamkins, "Symbol Error Rate of Multipulse PPM on a Discrete Memoryless Channel", September 17, 2003, JPL Interoffice Memorandum 331.2003.09.001, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  30. B. Moision, J. Hamkins, "Trading off symbol error rate for data rate on a Poisson PPM Channel", July 24, 2003, JPL Interoffice Memorandum 331.2003.07.001, [ps], [ps.gz], [pdf] [pdf.gz]
  31. J. Hamkins, "Idle thoughts on Gaussian signaling", JPL Interoffice Memorandum 331.2003.04.001, April 7, 2003, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  32. J. Hamkins, B. Moision, R.J. McEliece, "Asymptotic Capacity of PPM on a Poisson Channel", JPL Interoffice Memorandum 331.2003.06.001, June 2, 2003, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  33. J. Hamkins, B. Moision, "Performance of long blocklength RS codes with small PPM sizes" JPL Interoffice Memorandum 331.2003.02.001, February 12, 2003, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  34. J. Hamkins, "Summary of SFCG masks" JPL Interoffice Memorandum 331.2002.03.002, March 28, 2002, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  35. J. Hamkins, "Encoders and interleaver description for Atmel TSS902E chip", JPL Interoffice Memorandum 331.2002.03.001, March 20, 2002, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  36. J. Hamkins, "FER numbers for the TEMIC chip", JPL Interoffice Memorandum 331.2002.02.002, February 22, 2002, [ps], [ps.gz], [pdf]
  37. J. Hamkins, S. Dolinar, "Performance of RS+ with/without a convolutional interleaver", JPL Interoffice Memorandum 331.2002.02.001, February 8, 2002, [ps], [ps.gz], [pdf]
  38. B. Moision, J. Hamkins, "The impact of not having access to all slot counts when decoding PPM", JPL Interoffice Memorandum 331.2002.02.003, February 1, 2002, [html], [ps], [ps.gz], [pdf] [pdf.gz]
  39. K. Andrews, D. Divsalar, S. Dolinar, J. Hamkins, F. Pollara, "Very High Speed Analog Decoders", JPL Interoffice Memorandum 331.2001.10.001, August 24, 2001, [ps], [ps.gz], [pdf]
  40. J. Hamkins, "Coupled Receiver-Decoder Architectures for Symbol Timing and Improved Carrier Tracking", JPL Interoffice Memorandum 331.2001.08.001, August 24, 2001, [html], [ps], [ps.gz], [pdf]
  41. J. Hamkins and M. Srinivasan, "Comparison of Laboratory Collected Photodiode Detector Data to Theoretical Predictions", JPL Interoffice Memorandum 331.2000.12.001, December 14, 2000, [html], [ps], [ps.gz], [pdf]
  42. D. Divsalar and J. Hamkins, "A Coupled Receiver-Decoder For Turbo Codes", JPL Interoffice Memorandum 331.2000.08.001, August 16, 2000, [html], [ps], [ps.gz], [pdf]
  43. J. Hamkins, "An Optical Channel Has No Brick Wall Shannon Limit", JPL Interoffice Memorandum 331.2000.05.001, May 24, 2000, [html], [ps], [ps.gz], [pdf]
  44. J. Hamkins, "Symbol Error Rate in a Successive Interference Canceler", JPL Interoffice Memorandum 331.2000.04.001, April 25, 2000, [html], [ps], [ps.gz], [pdf]
  45. J. Hamkins, "Implementation of a Smoother in the Block V Receiver", JPL Interoffice Memorandum 331.2000.03.001, March 17, 2000. [html], [ps], [ps.gz], [pdf]
  46. J. Hamkins, "How the choice of a laser affects capacity of an optical channel", JPL Interoffice Memorandum, March 2, 2000.
  47. J. Hamkins, "Ranging Considerations for the MCAS Transceiver", JPL Interoffice Memorandum 331.99.8.001, August 18, 1999, [html], [ps], [ps.gz], [pdf]
  48. J. Hamkins, "More Remarks on Noise Generation", JPL Interoffice Memorandum 331.99.5.001, May 4, 1999, [html], [ps], [ps.gz], [pdf]
  49. J. Hamkins, "More Numerical Capacity Results for the Photon Counting Channel", JPL Interoffice Memorandum 331.99.1.001, January 5, 1999, [html], ps , [ps.gz], pdf
  50. J. Hamkins, "Turbo code Performance with SNR-Mismatching", JPL Interoffice Memorandum 331.98.12.008, December 14, 1998, [html], [ps], [ps.gz], [pdf]
  51. J. Hamkins, "Remarks on Noise Generation", JPL Interoffice Memorandum 331.98.11.007, December 3, 1998, [html], [ps], [ps.gz], [pdf]
  52. J. Hamkins, "Lower Bounds on the Number of Required Photons for Reliable Optical Communication with PPM Signals", JPL Interoffice Memorandum 331.98.9.005, November 17, 1998, [html], [ps], [ps.gz], [pdf]
  53. J. Hamkins, "PSP phase-tracking of convolutionally coded BPSK", JPL Interoffice Memorandum 331.98.9.006, September 8, 1998, [html], [ps], [ps.gz], [pdf]
  54. J. Hamkins, "Performance of Binary Turbo Coded 256-PPM", JPL Interoffice Memorandum 331.98.9.004, July 20, 1998, [html], [ps], [ps.gz], [pdf]
  55. J. Hamkins, "Binary Turbo Coded 256-PPM", JPL Interoffice Memorandum 331.98.9.003, April 22, 1998, [html], [ps], [ps.gz], [pdf]
  56. J. Hamkins, "An analytic technique to separate cochannel FM signals", JPL Interoffice Memorandum, January 5, 1998, [html], [ps], [ps.gz], [pdf]

Reports of Contracted Work

  1. J. Hamkins, “Autonomous Radio Receivers”, Annual RTD report, 2005.
  2. J. Hamkins, “Comparison of Two Differential Phase Detectors”, Report of contracted work for IEWD and NASA, 1997
  3. J. Hamkins, “Joint Phase Tracking of Co-Channel Signals Using a Viterbi Algorithm”, Report of contracted work for IEWD and NASA, 1997

News Articles and Essays

  1. J. Hamkins, "Three cheers for the timekeeping tool!," January 22, 2007, [html] (This article has been removed at the request of Employee Relations.)
  2. J. Hamkins, "Unix Tips: How to use Secure SHell (SSH) with a Palm Personal Digital Assistant (PDA)", Computing and Information Services News, vol. 19, no. 4, July/August, 2001, p. 6-7.
  3. J. Hamkins, "Coupled Receiver-Decoders", Telecommunications Mission Operations Directorate (TMOD) Technology and Science Program News, Issue 13, rev. 1, January, 2001, p. 11-13.
  4. J. Hamkins, "Why Windows is better than Linux (Humor)," Linux Today, February 15, 1999, rated Most Interesting Page of the month by Internet Valley.

Standards

  • AR4JA code family [pdf]

Online Calculators and Interactive Plots:

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