Walter Scott, Jr. College of Engineering

Graduate Exam Abstract

Yu Jiao
Ph.D. Preliminary
Aug 05, 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