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Graduate Exam Abstract


Yu Jiao

Ph.D. Final

July 10, 2017, 10:00 am - 12:00 pm

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 understand the behavior of ionospheric scintillation better, 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 foundation for the signal simulation and scintillation detection. The scintillation 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: N/A
Non-ECE Member: Clayton Shonkwiler, Math Department
Member 3: Charles Rino
Addional Members: Rockey Luo

Publications:
Jiao, Y., J. Hall, and Y. Morton (2017), Performance evaluation of an automatic GPS ionospheric phase scintillation detector using a machine learning algorithm, NAVIGATION, Journal of the Institute of Navigation, doi: 10.1002/navi.188.
Jiao, Y., J. Hall, and Y. Morton (2017), Automatic equatorial GPS amplitude scintillation detection using a machine learning algorithm, IEEE Trans. Aerosp. Electron. Syst., 53(1), 405-418, doi: 10.1109/TAES.2017.2650758
Jiao, Y., D. Xu, Y. Morton, and C. Rino (2016), Equatorial scintillation amplitude fading characteristics across the GPS requency bands, NAVIGATION, Journal of the Institute of Navigation, 63(3), 267-281, doi: 10.1002/navi.146.
Jiao, Y., and Y. Morton (2015), 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.
Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum (2013), Characterization of high-latitude ionospheric scintillation of GPS signals, Radio Sci., 48(6), 698-708, doi: 10.1002/2013RS005259.
Jiao, Y., J. Hall, and Y. Morton (2017), Automatic GPS phase scintillation detector using a machine learning algorithm, Proc. ION ITM/PTTI, 1160-1172, Monterey, CA.
Jiao, Y., J. Hall, and Y. Morton (2016), Performance evaluation of an equatorial GPS amplitude scintillation detector using a machine learning algorithm, Proc. ION GNSS+, 195-199, Portland, OR.
Jiao, Y., D. Xu, Y. Morton, and C. Rino (2016), Equatorial amplitude scintillation spectrum analysis and fading characteristics on GPS signals, Proc. ION GNSS+, 1680-1687, Portland, OR.
Jiao, Y., Y. Morton, D. Akos, and T. Walter (2015), A comparative study of triple frequency GPS scintillation signal amplitude fading characteristics at low latitudes, Proc. ION GNSS+, 3819-3825, Tampa, FL.
Morton, Y., Y. Jiao, F. Graas, E. Vinande, and N. Pujara (2015), Analysis of receiver multi-frequency response to ionospheric scintillation in Ascension Island, Hong Kong, and Singapore, Proc. ION PNT, 10-16, Honolulu, HI.
Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum (2014), Scintillating statistics: a look at high-latitude and equatorial ionospheric disturbances of GPS signals, GPS World, 56-62.
Jiao, Y., Y. Morton, S. Taylor, and M. Carroll (2014), Characteristics of low-latitude signal fading across the GPS frequency bands, Proc. ION GNSS+, 1203-1212, Tampa, FL.
Jiao, Y., Y. Morton, and S. Taylor (2014), Comparative studies of high-latitude and equatorial ionospheric scintillation characteristics of GPS signals, Proc. IEEE/ION PLANS, 37-42, doi: 10.1109/PLANS.2014.6851355.
Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum (2013), On the correlation between ionospheric scintillation and geomagnetic field activities, Proc. ION GNSS+, 77-83, Nashville, TN
Jiao, Y., Y. Morton, S. Taylor, and W. Pelgrum (2013), High latitude ionosphere scintillation characterization, Proc. ION ITM, 579-584, San Diego, CA.


Program of Study:
ECE516
ECE581A4
ECE581A6
ECE651
ECE795
ECE799
MATH618
GSTR600