所在斯坦福大学网址：http://stanford.edu/~gracegao/
2008年度早期成就奖
获得者：格蕾丝博士
表彰：其对了解和掌握伽利略及北斗等新卫星信号所作出的贡献
格蕾丝博士（高杏欣）已经在卫星导航领域做出了非常值得一提的贡献。她的研究专
注于新型全球导航卫星系统所使用的信号及其接收机。格蕾丝是首个破解伽利略试验卫
星和北斗一代地球中轨道卫星所使用的编码规则的人。2005年10月，欧洲人发射了伽利
略系统的首颗试验卫星，即GIOVE-A。该卫星的信号于2006年1月被激活。在几个小时之
内，格蕾丝与实验室里的其它工作人员一道捕捉到了三个波段上的新民用信号。在接下
来的几周里，格蕾丝独立工作，破解了GIOVE-A用于生成编码的底层算法，并对其三个
波段上所使用的频率进行了解码。她的成果作在2006年5-6月份的《Inside GNSS》封面
故事“新一代全球卫星导航系统信号的愿景与全貌”中被刊发。在此之后不久，全世界
的接收机公司都使用她的编码来制造原型接收机以获取和跟踪伽利略卫星的信号。
2007年4月，中国发射了属于其北斗一号系统的首颗地球中轨道卫星。在其先前取得成
功的技术基础上，格蕾丝解调了这颗M1卫星上所有民用码广播的三个波段频率（E2,E5b
,E6），证实了所有的北斗-M1编码都是Gold码，并且破解出其编码生成器为线性移位反
馈寄存器。她还将这些伪随机数码应用于一个软件接收机中获取并跟踪北斗-M1卫星。
2008年4月，欧洲人发射了GIOVE-B，即伽利略系统的另一枚试验用原型卫星。格蕾丝又
在第一时间破解了其底层编码生成器。
格蕾丝于2008年9月在斯坦福大学取得博士学位。之后她继续从事斯坦福研究项目中有
关卫星导航系统的研究，联邦航空局资助了这一项目。她已经在各类会议上提交并发表
了16篇高质量的论文。她是2007年国际导航技术大会的资助学生，在这届大会上，她的
论文赢得了该届大会的最佳论文奖。
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Grace Xingxin GaoDurand 453
496 Lomita Mall
Stanford CA 94305
650.723.8084
650.725.5517 (fax)
gracegao(at)stanford(dot)edu |
I am a Research Associate in the Global Positioning System (GPS) Lab at Stanford University. I completed the Ph.D. degree in electrical engineering at Stanford in 2008, supervised by Professor Per Enge. My dissertation is titled Towards Navigation based on 120 Satellites - Analyzing the New Signals.
I received the B.S. degree in mechanical engineering and the M.S. degree in electrical engineering from Tsinghua University in China in 2001 and 2003, respectively.
Research
GNSS Monitoring Facility
Building system to monitor Global Navigation Satellite Systems in real-time to detect power failure, changes in signal transmission, ionosphere scintillation, etc.
Multi-Constellation Analysis
Analyzing interoperability of multiple GNSS constellations. evaluating the overall performance of the multi-constellation system and the potential interference among the constellations.
Pulsed Interference Analysis and Mitigation
Analyzed Distance Measuring Equipment (DME) and Tactical Air Navigation (TACAN) interference environments and their degradation of Global Positioning System (GPS) L5 and Galileo E5a/E5b signals. Investigated techniques for pulsed interference mitigation to improve coexistence of GPS/Galileo with DME/TACAN systems.
Compass-M1 Code Analysis
Reverse-engineered pseudorandom noise (PRN) codes in all frequency bands (E2, E5b & E6) of the first Chinese global navigation satellite Compass-M1. Proved that all Compass-M1 codes are Gold codes and derived their code generators as linear shift feedback registers. Applied PRN codes in software receiver to acquire and track Compass-M1 satellite.
Galileo GIOVE-A Code Analysis
Reverse-engineered pseudorandom noise (PRN) code generators of the first European global navigation satellite GIOVE-A. Studied pseudorandomness and correlation properties of PRN codes to evaluate their processing gain and tolerance to noise and interference.
Publications
Journal and Magazine Articles
Grace Xingxin Gao, Liang Heng, David De Lorenzo, Sherman Lo, Dennis Akos, Alan Chen, Todd Walter, Per Enge and Bradford Parkinson, Modernization Milestone: Observing the First GPS Satellite with an L5 Payload, Inside GNSS Magazine, May-June 2009. [pdf]
Grace Xingxin Gao, Alan Chen, Sherman Lo, David De Lorenzo and Per Enge, Compass-M1 Broadcast Codes in E2, E5b and E6 Frequency Bands, IEEE Journal of Selected Topics in Signal Processing, Special Issue on Advanced Signal Processing for GNSS and Robust Navigation, accepted May 2009.
Grace Xingxin Gao, Dennis Akos, Todd Walter and Per Enge, GIOVE-B on the Air: Understanding Galileo's New Signals, Inside GNSS Magazine, May-June 2008. [pdf]
Grace Xingxin Gao, Alan Chen, Sherman Lo, David De Lorenzo and Per Enge, GNSS over China: the Compass MEO Satellite Codes, Inside GNSS Magazine, July-August 2007. [pdf]
Sherman Lo, Alan Chen, Per Enge, Grace Xingxin Gao, Dennis Akos, Jean-Luc Issler, Lionel Ries, Thomas Grelier and Joel Dantepal, GNSS Album: Images and Spectral Signatures of the New GNSS Signals, Inside GNSS Magazine, May-June 2006. [pdf]
Zhe Xiang, Song Song, Jin Chen, Hao Wang, Jian Huang and Grace Xingxin Gao, A Wireless LAN-based Indoor Positioning Technology, IBM Journal of Research and Development, vol. 48, no. 5, September-November 2004. [pdf]
Conference Papers
Patrick Henkel, Grace Xingxin Gao, Todd Walter and Christoph G黱ther, Robust Multi-Carrier, Multi-Satellite Vector Phase Locked Loop with Wideband Ionospheric Correction and Integrated Weighted RAIM, ENC Global Navigation Satellite Systems Conference 2009, Naples, Italy, May 2009. [pdf]
Grace Xingxin Gao, Dennis Akos, Todd Walter and Per Enge, Understanding the GIOVE-B Broadcast Codes of the Galileo System, IEEE Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, October 2008. Invited Paper.
Shankar Ramakrishnan, Grace Xingxin Gao, David De Lorenzo, Todd Walter, Per Enge and Dennis Akos, Design and Analysis of Reconfigurable Embeded GNSS Receivers Using Model-Based Design Tools, ION Global Navigation Satellite Systems Conference 2008, Savannah, Georgia, September 2008. Best Presentation Award. [pdf]
Grace Xingxin Gao, Alan Chen, Sherman Lo, David De Lorenzo and Per Enge, Compass-M1 Broadcast Codes and their Application to Acquisition and Tracking, ION National Technical Meeting 2008, San Diego, California, January 2008. [pdf]
Grace Xingxin Gao, DME/TACAN Interference and its Mitigation in L5/E5 Bands, ION Global Navigation Satellite Systems Conference 2007, Fort Worth, Texas, September 2007. Best Presentation Award and Student Paper Award. [pdf]
Grace Xingxin Gao, David De Lorenzo, Todd Walter and Per Enge, Acquisition and Tracking of GIOVE-A Broadcast L1/E5/E6 Signals and Analysis of DME/TACAN Interference on Receiver Design, ENC Global Navigation Satellite Systems Conference 2007, Geneva, Switzerland, May 2007. [pdf]
Grace Xingxin Gao, Seebany Datta-Barua, Todd Walter and Per Enge, Ionosphere Effects for Wideband GNSS Signals, ION Annual Meeting 2007, Cambridge, Massachusetts, April 2007. [pdf]
Grace Xingxin Gao, David De Lorenzo, Alan Chen, Sherman Lo, Dennis Akos, Todd Walter and Per Enge, Galileo GIOVE-A Broadcast E5 Codes and their Application to Acquisition and Tracking, ION National Technical Meeting 2007, San Diego, California, January 2007. [pdf]
Grace Xingxin Gao, Jim Spilker Jr., Todd Walter, Per Enge and Anthony Pratt, Code Generation Scheme and Property Analysis of Broadcast Galileo L1 and E6 Signals, ION Global Navigation Satellite Systems Conference 2006, Fort Worth, Texas, September 2006. [pdf]
Grace Xingxin Gao, Zhe Xiang, Hao Wang, Jun Shen, Jian Huang and Song Song, An Approach to Security and Privacy of RFID System for Supply Chain, IEEE International Conference on e-Commerce Technology for Dynamic e-Business 2004, Beijing, China, September 2004.
Grace Xingxin Gao, Richard Yao and Zhenming Feng, Hadamard Coded Multi-bandUWB, IEEE Semiannual Vehicular Technology Conference (VTC) 2003, Orlando, Florida, October 2003.
Richard Yao, Grace Xingxin Gao, Zhengqi Chen and Wenwu Zhu, UWB Multipath Channel Model Based on Time-Domain UTD Technique, IEEE Global Communications Conference GLOBECOM 2003, San Francisco, California, December 2003.
Grace Xingxin Gao, Lu Mingquan and Feng Zhenming, Asymmetric Hexagonal QAM Based OFDM System, IEEE International Conference on Communications, Circuits and Systems and West Sino Expositions 2002, Xi'an, China, June 2002.
Grace Xingxin Gao, Lu Mingquan and Feng Zhenming, Optimal Wavelet Packet Based Multicarrier Modulation over Multipath Wireless Channels, IEEE International Conference on Communications, Circuits and Systems and West Sino Expositions 2002, Xi'an, China, June 2002.
Invited Talks
Towards Navigation based on 120 Satellites - Understanding Galileo and Compass Signals, Stanford Center for Positioning, Navigation and Time Symposium, Stanford, California, November 5, 2008.
GNSS over China - Revealing Beidou/Compass Codes, The MITRE Corporation, Washington D.C., December 5, 2007.
Decoding Compass Codes, Civil Global Positioning System Service Interface Committee (CGSIC) Meeting, Fort Worth, Texas, September 25, 2007.
Revealing Compass Codes, German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt), Wessling, Germany, August 31, 2007.
Revealing GIOVE-A and Compass-M1 Codes, University of the German Federal Armed Forces (Universität der Bundeswehr), Munich, Germany, August 30, 2007.
Decoding Galileo and Compass, Alberta Section of the Institute of Navigation, Calgary, Canada, June 14, 2007.
How GPS Works, Sally Ride Science Festival, NASA Ames Research Center, Mountain View, California, October 21, 2006 and September 29, 2007.