In the recently held the international field of top event IPIN2017 indoor location positioning itself in the contest EvAAL, associate professor, institute of microelectronics liu yu team in our school by the "pedestrian push a navigation and positioning" events in track 1 to 2.13 meters of the positioning error of the runner-up.The EvAAL contest of indoor positioning is one of the world's most famous indoor positioning, represents the advanced level of the technology, designed to encourage development of accurate, practical indoor positioning technology, promote the development of the industry as a whole indoor positioning.