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A Repeater-Assisted Indoor GPS Signal Acquisition and Tracking

중계기 도움방식의 실내 GPS 신호 획득 및 추적

  • 송하영 (건국대학교 전자.정보통신공학과) ;
  • 임성혁 (건국대학교 전자.정보통신공학과) ;
  • 지규인 (건국대학교 전자 정보통신공학과)
  • Published : 2008.09.01

Abstract

A new method to deal with GPS indoor positioning by means of time synchronized switching GPS repeater has been developed by authors[1]. But the developed indoor positioning system has problems. Therefore, we proposed a method for indoor positioning using GNSS Repeater-Assisted. To solve the 3-dimensional user's position, the 4 or more retransmission antennas are needed in the previously proposed methods. If a GPS repeater periodically transmits the signal like as pseudollite, the information for assisting an acquisition and tracking can be informed to receiver. Then, the user position can be calculated using the induced weak signal. The advantage of the proposed algorithm is use of only 1 re-transmission antenna because the re-transmitted signal are not used for positioning but used for assisting an acquisition and tracking weak signals induced indoor. We analyze the propose algorithms through the experiment and performed the test of feasibility.

Keywords

References

  1. G.-I. Jee, J.-H. Lee, and S.-H. Im, "Indoor positioning using time synchronized switching GPS repeater," ION GNSS 2005, 2005
  2. S.-H. Im and G.-I. Jee, "An indoor positioning system using time-delayed GPS repeater," ION GNSS 2006, 2006
  3. G. Djuknic and R. Richton, "Geolocation and assisted GPS," IEEE Computer, February 2001
  4. Julien CARATORI, Marc FRANCOIS, and Nel SAMAMA, "UPGRADE: An indoor positioning system using a standard GPS receiver," ION GPS/GNSS 2003, 2003
  5. E. D. Kaplan, Understanding GPS Principles and Applications, Artech House, London, 1996