Journal Papers

  1. 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

  2. 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

  3. 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

  4. 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

Conference Papers

  1. 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

  2. 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 MeetingJan. 30 - Feb. 2, 2017, Monterey, CA, pp. 1256-1268

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

Magazine Articles

  1. Opportunity for accuracy
    J. Morales, J. Khalife, and Z. Kassas
    GPS World Magazine, Vol. 27, Issue 3, Mar. 2016, pp. 22-29

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

Presentations

  1. Navigation with cellular CDMA signals
    J. Khalife, K. Shamaei, and Z. Kassas
    Southern California Robotics Symposium, Apr. 2016, San Diego, CA

  2. Mapping and exploitation of navigation signals of opportunity
    J. Morales, J. Khalife, and Z. Kassas
    Southern California Robotics Symposium, Apr. 2016, San Diego, CA

  3. Robust autonomous vehicle navigation using signals of opportunity
    J. Khalife, K. Shamaei, and Z. Kassas
    University of California Center on Economic Competitiveness in Transportation (UCCONNECT), Feb. 2016, Riverside, CA

Patents

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

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

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

Ph.D. Dissertations

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