Journal Papers

  1. Collaborative navigation architectures for optimal information gathering from signals of opportunity
    Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, in preparation

  2. A closed-Loop map matching algorithm for ground vehicle navigation in GNSS-denied environments using signals of opportunity
    M. Maaref and Z. Kassas
    IEEE Transactions on Intelligent Transportation Systems, in preparation

  3. A quadratically constrained fractional quadratic programming approach for dilution of precision minimization
    J. Khalife and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, in preparation

  4. Lane-level localization and mapping in GNSS-challenged environments by fusing lidar data and cellular pseudoranges
    M. Maaref and Z. Kassas
    IEEE Transactions on Intelligent Vehicles, in preparation

  5. Navigation with cellular CDMA signals - Part II: performance analysis and experimental results
    J. Khalife and Z. Kassas
    IEEE Transactions on Signal Processing, 2017, submitted

  6. Navigation with cellular CDMA signals - Part I: signal modeling and software-defined receiver design
    J. Khalife, K. Shamaei, and Z. Kassas
    IEEE Transactions on Signal Processing, 2017, submitted

  7. Exploiting LTE signals for navigation: theory to implementation
    K. Shamaei, J. Khalife, and Z. Kassas
    IEEE Transactions on Wireless Communications, 2016, submitted

  8. Optimal collaborative mapping of terrestrial transmitters: receiver placement and performance characterization
    J. Morales and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, 2016, accepted

  9. Receding horizon trajectory optimization in opportunistic navigation environments
    Z. Kassas and T. Humphreys
    IEEE Transactions on Aerospace and Electronic Systems, Vol. 51, Issue 2, April 2015, pp. 866-877

  10. Greedy motion planning for simultaneous signal landscape mapping and receiver localization
    Z. Kassas, A. Arapostathis, and T. Humphreys
    IEEE Journal of Selected Topics in Signal Processing,Vol. 9, Issue 2, March 2015, pp. 247-258

  11. A phase-reconstruction technique enabling low-power centimeter-accurate mobile positioning
    K. Pesyna, Z. Kassas, R. Heath, and T. Humphreys
    IEEE Transactions on Signal Processing, Vol. 62, Issue 10, May 2014, pp. 2595-2610

  12. Observability analysis of collaborative opportunistic navigation with pseudorange measurements
    Z. Kassas and T. Humphreys
    IEEE Transactions on Intelligent Transportation Systems, Vol. 15, Issue 1, Feb. 2014, pp. 260-273

  13. Discretisation of continuous-time dynamic MIMO systems with nonuniform delays
    Z. Kassas
    IET Control Theory & Applications, Vol. 5, Issue 14, Sep. 2011, pp. 1637-1647

  14. A nonlinear filter coupled with hospitability and synthetic inclination maps for in-surveillance and out-of-surveillance target tracking
    Z. Kassas and U. Ozguner
    IEEE Transactions on Systems, Man, and Cybernetics - Part C, Vol. 40, Issue 1, Jan. 2010, pp. 87-97

  15. Power matching approach for GPS coverage extension
    S. Saab and Z. Kassas
    IEEE Transactions on Intelligent Transportation Systems, Vol. 7, Issue 2, Jun. 2006, pp. 156-166

Conference Papers

  1. A Low communication rate distributed inertial navigation architecture with cellular signal aiding
    J. Morales and Z. Kassas
    IEEE Vehicular Technology Conference, Jun. 3-6, 2018, Porto, Portugal, submitted

  2. Pseudorange analysis and multipath characterization for positioning with LTE secondary synchronization signals
    K. Shamaei, J. Khalife, and Z. Kassas
    IEEE Wireless Communications and Networking Conference, Apr. 15-18, 2018, Barcelona, Spain, submitted

  3. Distributed signals of opportunity aided inertial navigation with intermittent communication
    J. Morales and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 25-29, 2017, Portland, OR, pp. 2519-2530

  4. Computationally efficient receiver design for mitigating multipath for positioning with LTE signals
    K. Shamaei, J. Khalife, S. Bhattacharya, and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 25-29, 2017, Portland, OR, pp. 3751-3760

  5. Evaluation of relative clock stability in cellular networks
    J. Khalife and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 25-29, 2017, Portland, OR, pp. 2554-2559

  6. Ranging precision analysis of LTE signals
    K. Shamaei, J. Khalife, and Z. Kassas
    European Signal Processing Conference, Aug. 28 - Sep. 2, 2017, Kos Island, Greece, pp. 2788-2792 (special session)

  7. Pose estimation with lidar odometry and cellular pseudoranges
    J. Khalife, S. Ragothaman, and Z. Kassas
    IEEE Intelligent Vehicles Symposium, Jun. 11-14, 2017, Redondo Beach, CA, pp. 1722-1727

  8. Modeling and analysis of sector clock bias mismatch for navigation with cellular signals
    J. Khalife and Z. Kassas
    American Control Conference, May 24-26, 2017, Seattle, WA, pp. 3573-3578

  9. Collaborative autonomous vehicles with signals of opportunity aided inertial navigation systems
    J. Morales, J. Khalife, and Z. Kassas
    ION International Technical Meeting, Jan. 30 - Feb. 2, 2017, Monterey, CA, pp. 805-818

  10. Comparative results for positioning with secondary synchronization signal versus cell specific reference signal in LTE systems
    K. Shamaei, J. Khalife, and Z. Kassas
    ION International Technical Meeting, Jan. 30 - Feb. 2, 2017, Monterey, CA, pp. 1256-1268

  11. Signals of opportunity aided inertial navigation
    J. Morales, P. Roysdon, and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 12-16, 2016, Portland, OR, pp. 1492-1501

  12. Performance characterization of positioning in LTE systems
    K. Shamaei, J. Khalife, and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 12-16, 2016, Portland, OR, pp. 2262-2270

  13. Characterization of sector clock biases in cellular CDMA systems
    J. Khalife and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 12-16, 2016, Portland, OR, pp. 2281-2285

  14. A software-defined receiver architecture for cellular CDMA-based navigation
    J. Khalife, K. Shamaei, and Z. Kassas
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 11-14, 2016, Savannah, GA, pp. 816-826

  15. GNSS vertical dilution of precision reduction using terrestrial signals of opportunity
    J. Morales, J. Khalife, and Z. Kassas
    ION International Technical Meeting, Jan. 25-28, 2016, Monterey, CA, pp. 664-669

  16. Optimal receiver placement for collaborative mapping of signals of opportunity
    J. Morales and Z. Kassas
    ION Global Navigation Satellite Systems Conference, Sep. 14-18, 2015, Tampa, FL, pp. 2362-2368

  17. Indoor localization based on floor plans and power maps: non-line of sight to virtual line of sight
    J. Khalifeh, Z. Kassas, and S. Saab
    ION Global Navigation Satellite Systems Conference, Sep. 14-18, 2015, Tampa, FL, pp. 2291-2300

  18. Adaptive estimation of signals of opportunity
    Z. Kassas, V. Ghadiok, and T. Humphreys
    ION Global Navigation Satellite Systems Conference, Sep. 8-12, 2014, Tampa, FL, pp. 1679-1689

  19. A graphical approach to GPS software-defined receiver implementation
    Z. Kassas, J. Bhatti, and T. Humphreys
    IEEE Global Conference on Signal and Information Processing, Dec. 3-5, 2013, Austin, TX, pp. 1226-1229 (invited)

  20. The price of anarchy in active signal landscape map building
    Z. Kassas and T. Humphreys
    IEEE Global Conference on Signal and Information Processing, Dec. 3-5, 2013, Austin, TX, pp. 165-168

  21. Receding horizon trajectory optimization for simultaneous signal landscape mapping and receiver localization
    Z. Kassas, J. Bhatti, and T. Humphreys
    ION Global Navigation Satellite Systems Conference, Sep. 16-20, 2013, Nashville, TN, pp. 1962-1969

  22. Motion planning for optimal information gathering in opportunistic navigation systems
    Z. Kassas and T. Humphreys
    AIAA Guidance, Navigation, and Control Conference, Aug. 19-22, 2013, Boston, MA, pp. 4551-4565

  23. Observability and estimability of collaborative opportunistic navigation with pseudorange measurements
    Z. Kassas and T. Humphreys
    ION Global Navigation Satellite Systems Conference, Sep. 17-21, 2012, Nashville, TN, pp. 621-630

  24. Observability analysis of opportunistic navigation with pseudorange measurements
    Z. Kassas and T. Humphreys
    AIAA Guidance, Navigation, and Control Conference, Aug. 13-16, 2012, Minneapolis, MN, pp. 4760-4775

  25. Optimal H2 and H∞ control of extremely large segmented telescopes
    Z. Kassas and R. Bishop
    AIAA Guidance, Navigation, and Control Conference, Aug. 13-16, 2012, Minneapolis, MN, pp. pp. 4529-4540

  26. Constructing a continuous phase time history from TDMA signals for opportunistic navigation
    K. Pesyna, Z. Kassas, and T. Humphreys
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 24-26, 2012, Myrtle Beach, SC, pp. 1209-1220

  27. Tightly-coupled opportunistic navigation for deep urban and indoor positioning
    K. Pesyna, Z. Kassas, J. Bhatti, and T. Humphreys
    ION Global Navigation Satellite Systems Conference, Sep. 20-23, 2011, Portland, OR, pp. 3605-3617

  28. Numerical simulation of continuous-time stochastic dynamical systems with noisy measurements and their discrete-time equivalents
    Z. Kassas
    IEEE International Symposium on Computer-Aided Control System Design, Sep. 28-30, 2011, Denver, CO, pp. 1397-1402

  29. Methodologies for implementing FPGA-based control systems
    Z. Kassas
    IFAC World Congress, Aug. 28 - Sep. 2, 2011, Milan, Italy, pp. 9911-9916

  30. A numerical algorithm for reconstructing continuous-time linear models with pure integrators from their discrete-time equivalents
    Z. Kassas and G. Morrow
    IEEE International Symposium on Computer-Aided Control System Design, Sep. 3-5, 2008, San Antonio, TX, pp. 377-382

  31. New mechatronics development techniques for FPGA-based control of electromechanical systems
    B. MacCleery and Z. Kassas
    IFAC World Congress, Jul. 6-11, 2008, Seoul, South Korea, pp. 4434-4439

  32. A unified approach for classroom and laboratory control systems education
    Z. Kassas and R. Dunia
    IFAC World Congress, Jul. 6-11, 2008, Seoul, South Korea, pp. 14618-14623

  33. Discretization of MIMO systems with nonuniform input and output fractional time delays
    Z. Kassas and R. Dunia
    IEEE Conference on Decision and Control, Dec. 13-15, 2006, San Diego, CA, pp. 2541-2546

  34. Out-of-surveillance target state estimation: a combined hospitability and synthetic inclination approach
    Z. Kassas, U. Ozguner, and J. Layne
    IEEE Conference on Decision and Control, Dec. 14-17, 2004, Paradise Island, Bahamas, pp. 710-715

  35. Map-based land vehicle navigation system with DGPS
    S. Saab and Z. Kassas
    IEEE Intelligent Vehicle Symposium, Jun. 17-21, 2002, Versailles, France, pp. 209-214

Ph.D. Dissertation

  1. Analysis and synthesis of collaborative opportunistic navigation systems
    Z. Kassas
    Ph.D. Dissertation, The University of Texas at Austin, USA, May 2014

Book Chapters

  1. A hospitability map approach for estimating a mobile target location
    J. Layne, M. Eilders, Z. Kassas, and U. Ozguner
    In Recent Developments in Cooperative Control and Optimization, Kluwer Academic Publishers, Nov. 2003, pp. 117-124

Magazine Articles

  1. I hear, therefore I know where I am: compensating for GNSS limitations with cellular signals
    Z. Kassas, J. Khalife, K. Shamaei, and J. Morales
    IEEE Signal Processing Magazine, Vol. 34, Issue 5, Sep. 2017, pp. 111-124 (invited)

  2. LTE steers UAV
    Z. Kassas, J. Morales, K. Shamaei, and J. Khalife
    GPS World, Vol. 28, Issue 4, Apr. 2017, pp. 18-25 (cover article)

  3. Opportunity for accuracy
    J. Morales, J. Khalife, and Z. Kassas
    GPS World, Vol. 27, Issue 3, Mar. 2016, pp. 22-29 (cover article)

  4. Collaborative opportunistic navigation
    Z. Kassas
    IEEE Aerospace and Electronic Systems Magazine, Vol. 28, Issue 6, Jun. 2013, pp. 38-41

Patents

  1. Crowdsourced signals of opportunity aided inertial navigation system
    Z. Kassas and J. Morales
    U.S. Patent Application No. 62/561,026, Filed: Sep. 20, 2017

  2. A real-time, multipath-mitigating receiver design for navigation with LTE signals
    Z. Kassas, K. Shamaei, and J. Khalife
    U.S. Patent Application No. 62/561,023, Filed: Sep. 20, 2017

  3. Signals of opportunity aided inertial navigation system
    Z. Kassas and J. Morales
    U.S. Patent Application No. 62/398,413, Filed: Sep. 22, 2016

  4. Software-defined radio for navigation with LTE signals
    Z. Kassas, K. Shamaei, and J. Khalife
    U.S. Patent Application No. 62/398,403, Filed: Sep. 22, 2016

  5. Software-defined radio for navigation with cellular CDMA signals
    Z. Kassas, J. Khalife, and K. Shamaei
    U.S. Patent Application No. 62/294,758, Filed: Feb. 12 2016

  6. Multi-channel algorithm infrastructure for programmable hardware elements
    Z. Kassas and J. Lewis
    Patent No. 8,122,238, Issued: Feb. 21, 2012