泛在測(cè)繪論壇

1、基于手機(jī)的室外室內(nèi)高精度DGNSS定位系統(tǒng)香港理工大學(xué)土地測(cè)量及地理資訊學(xué)系陳武1BackgroundGPS revolutionize the concepts of positioning/navigation/timing (PNT)GPS has e an important infrastructure to support economic developmentMilitaryTransportation municationSpace IndustryFinance Location Based ServicesSurveyingWeather forecastingScien

2、tific researches 2BackgroundGNSS Based Services Global ServicesGPS, GLONASS, Beidou (III)Regional ServicesBeidou (II), IRNSSSatellite Based Augmentation Systems (SBAS)WAAS, EGNOS, MSAS, QZSS, GAGAN, .Local ServicesGround Based Augmentation systems (GBAS)Marine DGPS ServicesGNSS RTK Network3GNSS Loca

3、l infrastructure Development in Hong Kong Lands DepartmentGNSS control network“SatRef” Network (18 stations)Marine DepartmentDGPS system for marine navigationAutomatic Identification System (AIS) for port managementAirport Authority Considering a GBAS system for landing4HK GNSS Reference Network （Sa

4、tRef）5Established in 20036 land AIS stations to cover HK waterMonitoring ships in HK waterAlsoA DGPS beacon covers 150 nmi Hong Kong Land-based Automatic Identification system (AIS)6Hong Kong Airport 7HK SatRef NetworkReceivers for all GNSS constellations (GPS, Beidou, GLONASS, Galileo, QZSS)High Qu

5、ality Local Geoid1 cmProvide more reliable 3D cm level RTK Service Provide atmosphere remote sensing (troposphere and Ionosphere) service89101112DGNSS platform for mobilephonesEnhance GNSS Positioning with mobilephones for LBS applicationsDevelopment of a DGNSS platform for mobile users in Hong Kong

6、Indoor GNSS service for mobile users1314Ionosphere Gradient15Mobile phones TestedSamsung Galaxy S5: GPS/GLO/Beidou Samsung Galaxy tab: GPS/GLO/BeidouHuawei G610-U20: GPSLG: GPS/GLOHTC: GPS/GLOUniStrong E7737 : GPS/BDS (GLO) (Option with external GNSS antenna)16Test Results15:30 - 16:30, 2015-08-0717

7、18Airport car driving test15:09 -17: 06 , 2015-08-13 192021Indoor GPS system - Concept22PrincipleSeparating satellite signalsExtract individual satellite data from single GPS sourceRe-generate GPS signals for each satellite23Technology descriptionRelay separated signals to the indoor location.Each G

8、PS transmitter will responsible for one satellite signalsMin. 4 GPS transmitters are required to enable indoor positioningBetter geometry of the transmitters can improve the accuracy24PrincipleDetermine user position with indoor positioning algorithmMobile phone receive GPS signals from indoor trans

9、mittersLocation information (NMEA) is send to the positioning enginePositioning engine return the indoor position of the device25Algorithm ValidationGPS frontendGPS tracking (separate GPS signals)Position computationPosition OutputPosition OutputRegenerateGPS signals Position Output (regenerated dat

10、a)Indoor Environment26Acquisition ResultsFrom Original DataFrom Recovered DataPRN 9PRN 15PRN 18PRN 21Selected PRN Signal to generate recovered dataAcquired PRN Signal from recovered data27Positioning Results (without adding extra delay)From Original DataFrom Recovered DataMeanStdE(m)836575.994.86N(m

11、)818215.375.44MeanStdE(m)836575.573.24N(m)818216.083.2528Navigation Data29Indoor Case (Static)30Indoor Case (Moving)31Algorithm ValidationDevelop the testbed to demonstrate mobilephones can receive the reconstructed signals 32Proposed Pilot Test Site(HKIA, Terminal 2 - Departure Hall, Level 2 at entry area) 33SummaryCurrently, we are developing a seamless positioning infrastructure to support surve