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. Autonomous surface vehicle measurement location planning for optimal underwater acoustic transponder localization
    J. Garcia, J. Farrell, and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, in preparation

  3. Autonomous ground vehicle path planning in urban environments using signal reliability maps
    S. Ragothaman, M. Maaref, and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, in preparation

  4. Carrier phase-based opportunistic UAV navigation with asynchronous cellular signals
    J. Khalife and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, in preparation

  5. A closed-loop map matching approach for ground vehicle navigation in GNSS-denied environments using signals of opportunity
    M. Maaref and Z. Kassas
    IEEE Transactions on Intelligent Transportation Systems, submitted

  6. LTE receiver design and multipath analysis for navigation in urban environments
    K. Shamaei and Z. Kassas
    NAVIGATION, Journal of the Institute of Navigation, 2017, revision submitted after favorable reviews (invited)

  7. Optimal placement for dilution of precision minimization via quadratically constrained fractional programming
    J. Khalife and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, 2017, revision submitted after favorable reviews

  8. Lane-level localization and mapping in GNSS-challenged environments by fusing lidar data and cellular pseudoranges
    M. Maaref, J. Khalife, and Z. Kassas
    IEEE Transactions on Intelligent Vehicles, 2017, revision submitted after favorable reviews

  9. Stochastic observability and uncertainty characterization in simultaneous receiver and transmitter localization
    J. Morales and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, 2017, accepted

  10. Navigation with cellular CDMA signals - Part II: performance analysis and experimental results
    J. Khalife and Z. Kassas
    IEEE Transactions on Signal Processing, 2018, Vol. 66, Issue 8, Apr. 2018, pp. 2204-2218

  11. 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, 2018, Vol. 66, Issue 8, Apr. 2018, pp. 2191-2203

  12. Exploiting LTE signals for navigation: theory to implementation
    K. Shamaei, J. Khalife, and Z. Kassas
    IEEE Transactions on Wireless Communications, 2018, Vol. 17, Issue 4, Apr. 2018, pp. 2173-2189

  13. Optimal collaborative mapping of terrestrial transmitters: receiver placement and performance characterization
    J. Morales and Z. Kassas
    IEEE Transactions on Aerospace and Electronic Systems, 2018, Vol. 54, Issue 2, Apr. 2018, pp. 992-1007

  14. 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)

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. 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. Event-based communication strategy for collaborative navigation with signals of opportunity
    J. Morales and Z. Kassas
    Asilomar Conference on Signals, Systems and Computers, Oct. 28-31, 2018, Pacific Grove, CA, invited

  2. 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, accepted

  3. Precise UAV navigation with cellular carrier phase measurements
    J. Khalife and Z. Kassas
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 23-26, 2018, Monterey, CA, accepted

  4. Information fusion strategies for collaborative radio SLAM
    J. Morales and Z. Kassas
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 23-26, 2018, Monterey, CA, accepted

  5. A joint TOA and DOA approach for positioning with LTE signals
    K. Shamaei, J. Khalife, and Z. Kassas
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 23-26, 2018, Monterey, CA, accepted

  6. Optimal measurement location planning for localizing underwater transponders
    J. Garcia, J. Farrell, and Z. Kassas
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 23-26, 2018, Monterey, CA, accepted

  7. A machine learning approach for localization in cellular environments
    A. Abdallah, S. Saab, and Z. Kassas
    IEEE/ION Position, Location, and Navigation Symposium, Apr. 23-26, 2018, Monterey, CA, accepted

  8. Pseudorange and multipath analysis of 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, pp. 286-291

  9. 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

  10. 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

  11. 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

  12. 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)

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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)

  26. 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

  27. 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

  28. 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

  29. 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

  30. 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

  31. 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

  32. 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

  33. 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

  34. 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

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

  36. 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

  37. 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

  38. 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

  39. 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

  40. 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

  41. 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. 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)

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

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

Patents

  1. Precise navigation with cellular carrier phase measurements
    Z. Kassas and J. Khalife
    U.S. Patent Application No. 62/663,209, Filed: Apr. 26, 2018

  2. Event-triggered communication scheme for crowdsourced signals of opportunity aided inertial navigation system
    Z. Kassas and J. Morales
    U.S. Patent Application No. 62/663,198, Filed: Apr. 26, 2018

  3. A self-contained approach for positioning with LTE signals using a joint TOA and DOA estimation
    Z. Kassas, K. Shamaei, and J. Khalife
    U.S. Patent Application No. 62/663,203, Filed: Apr. 26, 2018

  4. 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

  5. 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

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

  7. 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

  8. 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

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