A quick location method for BDS receiver based on coarse positioning by GEO constellation
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    Abstract:

    Without knowing the approximate position of the receiver, the millisecond recovery algorithm of traditional global navigation satellite system signal-radiation existed problem of increasing computation, but unable to be applied. A fast positioning method for BDS receiver was proposed according to the high navigation data rate of GEO(Geosynchronous Earth Orbit) satellites in BeiDou Navigation Satellite System. Firstly, an approximate position was got by coarse positioning using GEO constellation. Then the signal transmission time recovery of MEO/IGSO satellite was made according to the approximate position. Finally, all the visible satellites were used for precise positioning. Using iGMAS stations observation pseudorange to verify the proposed algorithm. The stations in China can 100% got full-pseudorange and obtained fast positioning. By using BDS broadcast ephemeris data, a simulation environment was built. The white noise with 6 meters standard deviation is added to satellites pseudorang. And the cut-off angle of elevation is 0°. The success rate of the quick location method is bigger than 98.68%. And about 80% of Chinese surrounding area can 100% guarantee a complete satellite signal emission time restoration and obtain an accurate position.

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History
  • Received:September 17,2014
  • Revised:
  • Adopted:
  • Online: September 01,2015
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