Graduate Exam Abstract

Yu Jiao

Ph.D. Preliminary

August 5, 2016, 10:00 am - 11:00 am

Engineering Building C101B

Low-latitude ionospheric scintillation signal simulation, characterization, and detection on GPS signals

Abstract: Severe signal fluctuations during ionospheric scintillation poses a threat to GNSS signal tracking, and degrades position, navigation, and timing solution accuracy, especially in low-latitude regions. To better understand the behavior of ionospheric scintillation, this dissertation research proposes several methods regarding scintillation signal simulation, signal characterization and signal detection. The signal simulation is based on a two-dimensional two-component phase screen model, the output of which will be useful for the testing of robust tracking algorithms. The signal characterization will be conducted in both time and frequency domains, laying a foundation for the signal simulation and detection. The signal detection system is implemented via the support vector machine framework, which will further validate the effectiveness of the simulator. The results of this research will provide a thorough investigation of how to detect, characterize and simulate low- latitude scintillation signals, and will be helpful for the scientific research of space weather and the development of robust GNSS receivers.

Adviser: Yu Morton
Co-Adviser: NA
Non-ECE Member: Clayton Shonkwiler, Math
Member 3: Yu Morton, Jie Rockey Luo, Charles Rino, ECE
Addional Members: Richard Aster, Branislav Notaros

• Jiao, Y., D. Xu, Y. Morton, and C. Rino, Equatorial scintillation amplitude fading characteristics across the GPS
frequency bands, Navigation, accepted 06/2016
• Jiao, Y., and Y. Morton, Comparison of the effect of high-latitude and equatorial ionospheric scintillation on GPS
signals during the maximum of solar cycle 24, Radio Sci., 50(9), 886-903, doi: 10.1002/2015RS005719 09/2015
• Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum, Characterization of high-latitude ionospheric scintillation of GPS signals,
Radio Sci., 48(6), 698-708, doi: 10.1002/2013RS005259 12/2013
• Jiao, Y., Y. Morton, D. Akos, and T. Walter, A comparative study of triple frequency GPS scintillation signal amplitude
fading characteristics at low latitudes, Proc. ION GNSS+, Tampa, FL, US 09/2015
• Morton, Y., Y. Jiao, F. Graas, E. Vinande, and N. Pujara, Analysis of receiver multi-frequency response to ionospheric
scintillation in Ascension Island, Hong Kong, and Singapore, Proc. ION PNT, Honolulu, HI, US 04/2015
• Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum, Scintillating statistics: a look at high-latitude and equatorial ionospheric
disturbances of GPS signals, GPS World, 56-62 10/2014
• Jiao, Y., Y. Morton, S. Taylor, and M. Carroll, Characteristics of low-latitude signal fading across the GPS frequency
bands, Proc. ION GNSS+, 1203-1212, Tampa, FL, US 09/2014
• Jiao, Y., Y. Morton, and S. Taylor, Comparative studies of high-latitude and equatorial ionospheric scintillation
characteristics of GPS signals, PLANS 2014, 2014 IEEE/ION, 37-42, doi: 10.1109/PLANS.2014.6851355 05/2014
• Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum, On the correlation between ionospheric scintillation and geomagnetic
field activities, Proc. ION GNSS+, 77-83, Nashville, TN, US 09/2013
• Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum, High latitude ionosphere scintillation characterization, Proc. ION ITM,
579-584, San Diego, CA, US 01/2013
• Taylor, S., Y. Morton, Y. Jiao, J. Triplett, and W. Pelgrum, An Improved Ionosphere Scintillation Event Detection and
Automatic Trigger for GNSS Data Collection Systems, Proc. ION ITM, 1563-1569, Newport Beach, CA, US 01/2012

Program of Study:
ECE 516
ECE 581A4
ECE 581A6
ECE 651
ECE 795
MATH 618
ECE 799