September 2011 Meeting Summary

Dr. Chun Yang spoke to the Southern California Section about Signals of Opportunity for Positioning on Thursday, 29 September, 2011 at NavCom Technology. There were 20 in attendance. A brief bio and abstract of the talk follows, and the slides used during the meeting are attached.

Abstract of Dr. Yang’s Talk: (Presentation Slides)
There are strong requirements for the development of alternative navigation technologies for environments and areas in which GNSS signals are not available or are impaired.

These requirements exist not only because users desire similar accuracies for personal navigation in urban and indoor environments as those they currently enjoy in regions of open sky but also because such alternatives will enable many potentially lucrative location-based services.

The extensive and intensive spread of high definition terrestrial broadcast networks and wireless communication networks (e.g. Light Squared and other LTE/4G systems) presents both challenges (interference) and opportunities (information source) for positioning.

In this presentation, we will discuss system design issues for positioning with signals of opportunity including vertical dimensionality, non line-of-sight (NLOS) signals, the effect of the number of independent signal sources (GDOP), and source timing and synchronization among others. Both parametric and non-parametric methods for positioning with signals of opportunity will be described. We will present a number of signal examples including DTV, CDMA, and GSM as well as a number of applications with experimental results. A list of still-open issues will be discussed as will the current assessment for such systems as well as directions for continuing research.

Capsule Biography of Dr. Chun Yang
Dr. Chun Yang has been with Sigtem Technology, Inc., since 1994 where he works on adaptive array and baseband signal processing for GNSS receivers and radar systems as well as on nonlinear state estimation with applications in target tracking, integrated inertial navigation, and information fusion. Dr. Yang is also an adjunct professor of Electrical and Computer Engineering at Miami University. He is the co-inventor of ten issued and pending U.S. patents. Dr. Yang received his Docteur en Science from Université de Paris-Sud, Orsay, France, in Sciences Physiques in 1989 and his Bachelor of Engineering from Northeastern University, Shenyang, China, in 1984. He is the co-author of an ION-GNSS best presentation paper and an ION AM/IEEE PLANS best track paper, and the co-recipient of ION Samuel M. Burka Award.