Our Experts

Journal Articles

1. Zaher M. Kassas, Nadim Khairallah, Joe J. Khalife, Chiawei Lee, Juan Jurado, Steven Wachtel, Jacob Duede, Zachary Hoeffner, Thomas Hulsey, Rachel Quirarte and RunXuan Tay (2024) “Aircraft Navigation in GNSS-Denied Environments via Radio SLAM With Terrestrial Signals of Opportunity”, IEEE Transactions on Intelligent Transportation Systems, 25(10), pp. 14164–14182. Available at: 10.1109/TITS.2024.3405908. [ITS-Irvine record]
2. Joe Khalife and Zaher M. Kassas (2020) “Opportunistic UAV navigation with carrier phase measurements from asynchronous cellular signals”, IEEE Transactions on Aerospace and Electronic Systems, 56(4), pp. 3285–3301. Available at: 10.1109/taes.2019.2948452. [ITS-Irvine record]
3. Zaher Zak M. Kassas, Mahdi Maaref, Joshua J. Morales, Joe J. Khalife and Kimia Shamei (2020) “Robust vehicular localization and map matching in urban environments through IMU, GNSS, and cellular signals”, IEEE Intell. Transport. Syst. Mag., 12(3), pp. 36–52. Available at: 10.1109/mits.2020.2994110. [ITS-Irvine record]
4. Joe J. Khalife and Zaher Zak M. Kassas (2019) “Optimal sensor placement for dilution of precision minimization via quadratically constrained fractional programming”, IEEE Transactions on Aerospace and Electronic Systems, 55(4), pp. 2086–2096. Available at: 10.1109/taes.2018.2879552. [ITS-Irvine record]
5. Mahdi Maaref, Joe Khalife and Zaher M. Kassas (2019) “Lane-level localization and mapping in GNSS-Chal­lenged environments by fusing lidar data and cellular pseudoranges”, IEEE Transactions on Intelligent Vehicles, 4(1), pp. 73–89. Available at: 10.1109/tiv.2018.2886688. [ITS-Irvine record]
6. Joe Khalife, Kimia Shamaei and Zaher M. Kassas (2018) “Navigation with cellular CDMA Signals—Part I: Signal modeling and software-defined receiver design”, IEEE Transactions on Signal Processing, 66(8), pp. 2191–2203. Available at: 10.1109/tsp.2018.2799167. [ITS-Irvine record]
7. Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2018) “Exploiting LTE signals for navigation: Theory to implementation”, IEEE Transactions on Wireless Communications, 17(4), pp. 2173–2189. Available at: 10.1109/twc.2018.2789882. [ITS-Irvine record]
8. Joe Khalife and Zaher M. Kassas (2018) “Navigation with cellular CDMA Signals—Part II: Performance analysis and experimental results”, IEEE Transactions on Signal Processing, 66(8), pp. 2204–2218. Available at: 10.1109/tsp.2018.2799166. [ITS-Irvine record]
9. Zaher Zak M. Kassas, Joe Khalife, Kimia Shamaei and Joshua Morales (2017) “I hear, therefore I know where I am: Compensating for GNSS limitations with cellular signals”, IEEE Signal Processing Magazine, 34(5), pp. 111–124. Available at: 10.1109/msp.2017.2715363. [ITS-Irvine record]

Conference Papers

1. Joe Khalife and Zaher M. Kassas (2019) “Assessment of differential carrier phase measurements from orbcomm LEO satellite signals for opportunistic navigation”, in Proceedings of the 32nd international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2019). Institute of Navigation, pp. 4053–4063. Available at: 10.33012/2019.17031. [ITS-Irvine record]
2. Joshua J. Morales, Joe Khalife, Ulices Santa Cruz and Zaher M. Kassas (2019) “Orbit modeling for simultaneous tracking and navigation using LEO satellite signals”, in Proceedings of the 32nd international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2019). Institute of Navigation, pp. 2090–2099. Available at: 10.33012/2019.17029. [ITS-Irvine record]
3. Joe J. Khalife and Zaher M. Kassas (2019) “Receiver design for Doppler positioning with Leo satellites”, in ICASSP 2019 - 2019 IEEE international conference on acoustics, speech and signal processing (ICASSP). IEEE (International conference on acoustics speech and signal processing ICASSP), pp. 5506–5510. Available at: 10.1109/icassp.2019.8682554. [ITS-Irvine record]
4. Mahdi Maaref, Joe Khalife and Zaher M. Kassas (2019) “Pseudorange measurement outlier detection for navigation with cellular signals. WIP abstract”, in Proceedings of the 10th ACM/IEEE international conference on cyber-physical systems. ACM, pp. 346–347. Available at: 10.1145/3302509.3313334. [ITS-Irvine record]
5. Joshua Morales, Joe Khalife and Zaher M. Kassas (2019) “Simultaneous tracking of orbcomm LEO satellites and inertial navigation system aiding using Doppler measurements”, in 2019 IEEE 89th vehicular technology conference (VTC2019-Spring). IEEE (IEEE vehicular technology conference proceedings). Available at: 10.1109/vtcspring.2019.8746485. [ITS-Irvine record]
6. Christian T. Ardito, Joshua J. Morales, Joe Khalife, Ali.A. Abdallah and Zaher M. Kassas (2019) “Performance evaluation of navigation using LEO satellite signals with periodically transmitted satellite positions”, in Proceedings of the 2019 international technical meeting of the institute of navigation. Institute of Navigation (Proceedings of the international technical meeting of the institute of navigation), pp. 306–318. Available at: 10.33012/2019.16743. [ITS-Irvine record]
7. Joe J. Khalife, Souradeep Bhattacharya and Zak M. Kassas (2018) “Centimeter-accurate UAV navigation with cellular signals”, in Proceedings of the 31st international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2018). Institute of Navigation, pp. 2321–2331. Available at: 10.33012/2018.16105. [ITS-Irvine record]
8. Mahdi Maaref, Joe Khalife and Zak M. Kassas (2018) “Integrity monitoring of LTE signals of opportunity-based navigation for autonomous ground vehicles”, in Proceedings of the 31st international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2018). Institute of Navigation, pp. 2456–2466. Available at: 10.33012/2018.16093. [ITS-Irvine record]
9. Joshua J. Morales, Joe Khalife, Ali A. Abdallah, Christian T. Ardito and Zak M. Kassas (2018) “Inertial navigation system aiding with orbcomm LEO satellite Doppler measurements”, in Proceedings of the 31st international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2018). Institute of Navigation, pp. 2718–2725. Available at: 10.33012/2018.16059. [ITS-Irvine record]
10. Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2018) “Pseudorange and multipath analysis of positioning with LTE secondary synchronization signals”, in 2018 IEEE wireless communications and networking conference (WCNC). IEEE, p. 43836. Available at: 10.1109/wcnc.2018.8377438. [ITS-Irvine record]
11. Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2018) “A joint TOA and DOA approach for positioning with LTE signals”, in 2018 IEEE/ION position, location and navigation symposium (PLANS). IEEE, pp. 81–91. Available at: 10.1109/plans.2018.8373368. [ITS-Irvine record]
12. Joe Khalife and Zaher M. Kassas (2018) “Precise UAV navigation with cellular carrier phase measurements”, in 2018 IEEE/ION position, location and navigation symposium (PLANS). IEEE, pp. 978–989. Available at: 10.1109/plans.2018.8373476. [ITS-Irvine record]
13. Kimia Shamaei, Joe Khalife, Souradeep Bhattacharya and Zaher M. Kassas (2017) “Computationally efficient receiver design for mitigating multipath for positioning with LTE signals”, in Proceedings of the 30th international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2017). Institute of Navigation, pp. 3751–3760. Available at: 10.33012/2017.15229. [ITS-Irvine record]
14. Joe J. Khalife and Zaher M. Kassas (2017) “Evaluation of relative clock stability in cellular networks”, in Proceedings of the 30th international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2017). Institute of Navigation, pp. 2554–2559. Available at: 10.33012/2017.15221. [ITS-Irvine record]
15. Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2017) “Ranging precision analysis of LTE signals”, in 2017 25th european signal processing conference (EUSIPCO). IEEE, pp. 2719–2723. Available at: 10.23919/eusipco.2017.8081705. [ITS-Irvine record]
16. Joe Khalife, Sonya Ragothaman and Zaher M. Kassas (2017) “Pose estimation with lidar odometry and cellular pseudoranges”, in 2017 IEEE intelligent vehicles symposium (IV). IEEE, pp. 1722–1727. Available at: 10.1109/ivs.2017.7995956. [ITS-Irvine record]
17. Joe Khalife and Zaher M. Kassas (2017) “Modeling and analysis of sector clock bias mismatch for navigation with cellular signals”, in 2017 american control conference (ACC). IEEE, pp. 3573–3578. Available at: 10.23919/acc.2017.7963500. [ITS-Irvine record]
18. Joshua J. Morales, Joe Khalife and Zaher M. Kassas (2017) “Collaborative autonomous vehicles with signals of opportunity aided inertial navigation systems”, in Proceedings of the 2017 international technical meeting of the institute of navigation. Institute of Navigation, pp. 805–818. Available at: 10.33012/2017.14896. [ITS-Irvine record]
19. Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2017) “Comparative results for positioning with secondary synchronization signal versus cell specific reference signal in LTE systems”, in Proceedings of the 2017 international technical meeting of the institute of navigation. Institute of Navigation, pp. 1256–1268. Available at: 10.33012/2017.14885. [ITS-Irvine record]
20. Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2016) “Performance characterization of positioning in LTE systems”, in Proceedings of the 29th international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2016). Institute of Navigation, pp. 2262–2270. Available at: 10.33012/2016.14732. [ITS-Irvine record]
21. Joe Khalife and Zaher M. Kassas (2016) “Characterization of sector clock biases in cellular CDMA systems”, in Proceedings of the 29th international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2016). Institute of Navigation, pp. 2281–2285. Available at: 10.33012/2016.14731. [ITS-Irvine record]
22. Joe Khalife, Kimia Shamaei and Zaher M. Kassas (2016) “A software-defined receiver architecture for cellular CDMA-based navigation”, in 2016 IEEE/ION position, location and navigation symposium (PLANS). IEEE, pp. 816–826. Available at: 10.1109/plans.2016.7479777. [ITS-Irvine record]
23. Joshua J. Morales, Joe J. Khalife and Zaher M. Kassas (2016) “GNSS vertical dilution of precision reduction using terrestrial signals of opportunity”, in Proceedings of the 2016 international technical meeting of the institute of navigation. Institute of Navigation, pp. 664–669. Available at: 10.33012/2016.13463. [ITS-Irvine record]

Other

1. Z.M. Kassas, J.J. Morales, K. Shamaei and J. Khalife (2017) “LTE steers UAV: No GPS? No problem! Signals of opportunity work in challenged environments”, GPS World, pp. 18–25. Available at: https://www.gpsworld.com/lte-cellular-steers-uav-signals-of-opportunity-work-in-challenged-environments/. [Other] [ITS-Irvine record]
2. J.J. Morales, J.J. Khalife and Z.M. Kassas (2016) “Opportunity for accuracy: Terrestrial SOPs attractive supplement to GNSS”, GPS World, 7 March, pp. 22–29. Available at: https://www.gpsworld.com/opportunity-for-accuracy/. [Other] [ITS-Irvine record]