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Image: GPS World

About Grace Xingxin Gao

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Grace Xingxin Gao received a Ph.D. degree in electrical engineering from Stanford University. She is an assistant professor in the Aerospace Engineering Department at the University of Illinois at Urbana-Champaign.

Posts by Grace Xingxin Gao

GPS-lidar fusion with 3D city models Posted on 15 Sep 2017 in the From the Magazine & UAV/UGV categories.

A GPS-lidar fusion technique implements a novel method for efficiently modeling lidar-based position error covariance based on features in the point cloud. The fusion uses a three-dimensional (3D) city model... Read more»

Innovation: Position estimation using non-line-of-sight GPS signals Posted on 15 Mar 2017 in the Featured Stories & From the Magazine & GNSS & Innovation categories.

Reflected Blessings
A technique developed by researchers at the University of Illinois at Urbana-Champaign distinguishes a reflected non-line-of-sight (NLOS) signal of a particular satellite from the LOS signal and characterizes the NLOS signal as coming from a virtual mirror-image satellite in the direction of the signal reflection point. By using information on the position and orientation of the reflector, the NLOS signal can be treated as an additional LOS signal. Read more»