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Dr. Roy T. Derryberry

Clinical Associate Professor

University of North Texas

Department of Electrical Engineering

(940) 369-8282

Email: Tom.Derryberry@unt.edu

Education

  • PhD, Southern Methodist University, 1995
    Major: Electrical Engineering
    Specialization: Communications, Controls, and Signal/Image Processing
    Dissertation: Adaptive Reference Correlation Subpixel Tracking
  • MS, University of Arkansas, 1987
    Major: Electrical Engineering
    Specialization: Theoretical Statistics Applications to Communications, Controls, Signal Processing
    Dissertation: Optical Flow: An Alternate Approach to Motion Analysis
  • BS, University of Arkansas, 1985
    Major: Electrical Engineering
    Specialization: Signal Processing and Business

Professional Positions

    Academic - Post-Secondary

  • Assistant Dean for Coporate Relations, University of North Texas. University of North Texas. (2015 - Present).

    • Professional

  • Director of Engineering Operations, DBerry Enterprises. DBerry Enterprises. (2006 - Present).
  • Manager, BlackBerry. BlackBerry. (2013 - 2014).
  • Senior Research Engineer, Principal Engineer, Research Manager, and Senior Manager, Nokia. Nokia. (1998 - 2012).
  • Engineering Systems Analysist, Systems Engineer, and Senior Systems Engineer, Texas Instruments / Raytheon TI Systems. Texas Instruments / Raytheon TI Systems. (1988 - 1998).

Licensures and Certifications

  • Registered Professional Engineer, Texas Board of Registration for Professional Engineers. (1993 - 2025).

Professional Memberships

  • Institute of Electrical and Electronics Engineers. (January 1, 1987 - Present).

Teaching

Teaching Experience

    University of North Texas

  • CSCE 4510 - Introduction to Wireless Communications, 1 course.
  • CSCE 5510 - Wireless Communication, 1 course.
  • EENG 2610 - Circuit Analysis, 12 courses.
  • EENG 2620 - Signals and Systems, 3 courses.
  • EENG 2710 - Digital Logic Design, 11 courses.
  • EENG 4510 - Digital Communications, 1 course.
  • EENG 4610 - Digital Signal Processing, 1 course.
  • EENG 5520 - Design and Testing of Digital Systems, 4 courses.
  • EENG 5610 - Digital Signal Processing, 11 courses.
  • EENG 5630 - Adaptive Signal Processing, 1 course.
  • EENG 5810 - Digital Communications, 1 course.
  • EENG 5830 - Coding Theory, 2 courses.

Teaching at Other Institutions

  • University of North Texas, EENG 5610 Digital Signal Processing, Spring 2017.
  • University of North Texas, EENG 5630 Adaptive Signal Processing, Fall 2016.
  • University of North Texas, CSCE 5510 Wireless Communications, Spring 2016.
  • Southern Methodist University, EE 2356 Network Analysis II, Spring 1988.
  • Southern Methodist University, EE 2370 Signals and Systems Analysis, Summer 1987.

Directed Student Learning

  • Other (Consultations on Sr. Design Project), "Formula SAE EV Battery System," Electrical Engineering. (September 2023).
  • Dissertation Committee Member, "Proposal," Electrical Engineering. (September 2023).
  • Other (Consultations on Senior Design Projects/ UNT Student Group Advisor), "Underwater Robot," Electrical Engineering. (August 2022).
  • Other (Consultations on Senior Design Projects), "Unknown," Electrical Engineering. (August 2021).
  • Other (Consultations on Senior Design Projects), "NASA Mars Rover Challenge?," Mechanical and Energy Engineering. (January 2021).
  • Dissertation Committee Member, "Proposal," Electrical Engineering. (December 2023).
  • Dissertation Committee Member, "Proposal," Electrical Engineering. (December 1, 2023).
  • Dissertation Committee Member, "Dissertation Defense," Electrical Engineering. (February 2021 - November 2023).
  • Dissertation Committee Member, "Dissertation Defense," Electrical Engineering. (May 1, 2023).

Awards and Honors

  • Arkansas Academy of Electrical Engineering, Univeristy of Arkansas. (April 20, 2005).
  • IEEE Senior Member, IEEE. (December 31, 2002).

Research

Published Intellectual Contributions

    Conference Proceeding

  • Derryberry, R.T., Pi, Z. (2004). Overview and performance of the cdma2000 1xEV-DV enhanced reverse link. Spread Spectrum Techniques and Applications, 2004 IEEE Eighth International Symposium on. 839–843.
  • Raghothaman, B., Derryberry, R.T., Ionescu, M., Zhang, J. (2004). Systematic water-filling for turbo coded CDMA packet data transmission over MIMO channels. 3G Mobile Communication Technologies, 2004. 3G 2004. Fifth IEE International Conference on. 222–226.
  • Pi, Z., Derryberry, R.T. (2003). CDMA2000 1X EV-DV reverse link system design. Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE. 1 514–519.
  • Ma, L., Rong, Z., Derryberry, R.T. (2003). Performance of cdma2000 1X EV-DV system. Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual. 2 1163–1167.
  • LaRocque, D., Raghothaman, B., Derryberry, T., Fry, G. (2001). Techniques for efficient wireless communication systems modeling using C++. Communications, 2001. ICC 2001. IEEE International Conference on. 10 3262–3264.
  • Raghothaman, B., Mandyam, G., Derryberry, R.T. (2000). Performance of closed loop transmit diversity with feedback delay. Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on. 1 102–105.
  • Raghothaman, B., Derryberry, R.T., Mandyam, G. (2000). Transmit adaptive array without user-specific pilot for 3G CDMA. Acoustics, Speech, and Signal Processing, 2000. ICASSP’00. Proceedings. 2000 IEEE International Conference on. 5 3009–3012.
  • Derryberry, R.T., Wong, T.F., Lehnert, J.S. (1998). An iterative blind adaptive receiver for DS-SSMA systems. Military Communications Conference, 1998. MILCOM 98. Proceedings., IEEE. 1 160–164.

    • Journal Article

  • Derryberry, R.T. TITLE: 1xEV-DV Evaluation Methodology (V11) SOURCE.
  • Derryberry, R.T., Pi, Z. (2005). Reverse high-speed packet data physical layer enhancements in cdma2000 1$$ EV-DV. Other. 43 (4) 41–47. IEEE.
  • Hsu, L., Derryberry, R.T., Pi, Z., Ilkka, N. (2004). 3G Evolution: cdma2000 1xEV-DV Forward and Reverse Links. Other.
  • Derryberry, R.T., Hsu, A., Tamminen, W. (2004). Overview of cdma2000 revision D. Other. 1–3.
  • Derryberry, R.T., Pi, Z. (2003). 1x Evolved high-speed integrated Data and Voice (1xEV-DV): Reverse Link Overview and Performance. Other. 13
  • Derryberry, T.R., Gray, S.D., Ionescu, M.D., Mandyam, G., Raghothaman, B. (2002). Transmit diversity in 3G CDMA systems. Other. 40 (4) 68–75. IEEE.
  • Raghothaman, B., Derryberry, R.T., Ionescu, D.M. (2001). Closed Loop Transmit Diversity with Prediction. Other. IEEE.
  • Jensen, C.A., Derryberry, R.T. (1997). Autocode Generation for Use in a Rapid Prototyping Environment. Other.
  • Derryberry, R.T., Dunham, J.G. (1996). Search-Based Subpixel Tracking. Other.
  • Lindahl, C.E., Cockcroft, A., Derryberry, T., Sigler, J., Yablonski, M. (1990). Synthetic Multisensor Database Generation and Validation. Other. 1310

    • Other

  • Wang, Y., Derryberry, R.T. (2004). Adaptive spreading factor based on power control. Google Patents.

    • US Patent

  • Derryberry, R.T. (2014). Extended user input. Google Patents.
  • Derryberry, R.T., Hsu, L., Cheng, M.W. (2010). Method and apparatus for switching mobile station between autonomous and scheduled transmissions. Google Patents.
  • Toskala, A., Malkamaki, E., Hao, G., Rinne, M.J., Derryberry, R.T. (2009). Method and apparatus for distributed signaling for uplink rate control. Google Patents.
  • Derryberry, R.T., Boariu, A., Rong, Z. (2009). Efficient HARQ control and channel quality feedback reporting for multicarrier systems. Google Patents.
  • Derryberry, R.T., Rong, Z., Luukkanen, P. (2008). Apparatus and associated method, by which to facilitate scheduling of data communications in a radio communications system. Google Patents.
  • Tang, C.K., El-Rayes, M., Derryberry, R.T., Mandyam, G.D. (2006). Method and apparatus providing enhanced reservation access mode for a CDMA reverse channel. Google Patents.
  • Toskala, A., Malkamaki, E., Rinne, M.J., Virtanen, A., Hao, G., Derryberry, R.T. (2005). System and method for random access channel capture with automatic retransmission request. Google Patents.
  • Raghothaman, B., Derryberry, R.T. (2005). Apparatus, and associated method, for facilitating antenna weight selection utilizing deterministic perturbation gradient approximation. Google Patents.
  • Toskala, A., Malkamäki, E., Hao, G., Rinne, M.J., Derryberry, R.T. (2004). Two threshold uplink rate control to enable uplink scheduling. Google Patents.
  • Derryberry, R.T., Raghothaman, B. (2004). Adaptive antenna transmit array with reduced CDMA pilot channel set. Google Patents.
  • Wang, Y., Derryberry, R.T. (2004). Control based on adaptive spreading factor. Google Patents.
  • Wang, S., Derryberry, R.T. (2003). Method and apparatus for determining whether to employ an antenna array beamforming technique. Google Patents.
  • Derryberry, R.T., Gray, S.D., Rong, Z. (2002). Method and apparatus for power control on a common channel in a telecommunication system. Google Patents.
  • Wang, S., Derryberry, R.T. (2002). Method and apparatus for optimizing the usage of an antenna array beamforming technique. Google Patents.

Contracts, Grants, Sponsored Research

    Grant - Research

  • Li, X. (Principal), Luyen, H.T. (Co-Principal), Huang, Y. (Co-Principal), Derryberry, R.T. (Supporting), "Novel Beamforming and Directional Communication Development," sponsored by Army Research Lab/Northeastern University, Federal, $397734 Funded. (2024 - 2025).
  • Li, X. (Principal), Luyen, H.T. (Co-Principal), Huang, Y. (Co-Principal), Derryberry, R.T. (Supporting), "Empowering Directional Communications with Hybrid Beamforming and Deep Learning," sponsored by Army Research Lab/Northeastern University, Federal, $1694437 Funded. (2023 - 2024).

Service

University Service

  • Chairperson, CENG Academic Integrity Committee. (September 19, 2022 - Present).
  • Faculty Advisor, UNT UWRT University of North Texas Underwater Robotics Team. (September 1, 2022 - Present).
  • Member, Undergraduate Curriculum Committe. (August 2021 - Present).
  • Member, Undergraduate Curriculum Committe. (August 2020 - Present).
  • Chairperson, Academic Integrity. (September 16, 2022 - September 16, 2023).
  • Committee Member, EENG 2610 Textbook Slection. (September 1, 2021 - January 31, 2022).