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http://dx.doi.org/10.5370/KIEE.2011.60.12.2318

Improving the Performance of CDGPS using the Shaping Filter on Multipath  

Cho, Sung-Lyong (충남대 공과대학 전자공학과)
Han, Young-Hoon (충남대 공과대학 전자공학과)
Choi, Heon-Ho (충남대 공과대학 전자공학과)
Heo, Moon-Beom (한국항공우주연구원)
Park, Chan-Sik (충북대 전자정보대학 제어로봇공학과)
Lee, Sang-Jeong (충남대 공과대학 전자공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.60, no.12, 2011 , pp. 2318-2325 More about this Journal
Abstract
The quality of float solution deeply influences the performance of CDGPS because the theories being used in the integer ambiguity resolution method are derived under the assumption of AWGN. But in real world, the properties of noises are far from AWGN, especially when multipath are concerned. It results in the bias in float solution which affects the success rate of integer ambiguity and the precision of position in CDGPS. This paper designs an augmented Kalman filter using shaping filter and Kalman filter for the performance improvement of CDGPS on multipath. The experimental results with real measurements show that the correct integer ambiguity is always found while the success rates of WLSQ and ordinary Kalman filter are 5% and 18%, respectively. Eventually, the position accuracy is also improved by using the proposed algorithm.
Keywords
CDGPS; Float solution; Integer ambiguity; Shaping filter; Kalman filter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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1 Townsend, B. and P. Fenton, "A Practical Approach to the Reduction of Pseudorange Multipath Errors in a L1 GPS Receiver", Proceedings of ION GPS-94, Salt Lake City, September 20-23, pp. 143-148, 1994.
2 R. Van Nee, J. Siereveld, P. Fention, and B. Townsend, "The multipath estimating delay lock loop: Approaching theoretical accuracy limits", in Proc. IEEE Position, Location, and Navigation Symp., pp. 246-251, 1994.
3 Ray, J., "Mitigation of GPS Code and Carrier Phase Multipath Effects Using a Multi-Antenna System", PhD Thesis, Department of Geomatics Engineering, University of Calgary, Alberta, Canada, UCGE Reports Number 20136, 2000
4 http://www.novatel.com
5 Chiou, T-Y, "GPS Receiver Performance Using Inertial-Aided Carrier Tracking Loop", in Proceedings of ION GNSS, 13-16 September, Long Beach CA, U.S. Institute of Navigation, Fairfax VA, USA, pp. 2895-2910, 2005. 9
6 최병규, "중거리 기선 측지 성능 개선을 위한 지역 전리층 모델 개발", 충남대학교대학원, 제어전공, 박사학위 논문, 2009.
7 Teunissen PJG, "Integer estimation in the presence of biases", J. Geod., vol. 75, pp.399-408, 2001   DOI   ScienceOn
8 P. Joosten and M. Irsigler, "GNSS ambiguity resolution in the presence of multipath", Technical report, Mathematical Geodesy and Positioning, Delft University of Technology, The Netherlands.
9 Danskin, S., P. Bettinger, and T. Jordan., "Multipath mitigation under forest canopies : A choke ring antenna solution", Forest Science vol. 55(2), pp. 109-116, 2009.
10 Chansik Park, "Efficient Ambiguity Resolution using Constraint Equation", Proceedings of the 1996 IEEE Position Location and Navigation Symposium, p 277-284, PLANS, Atlanta, GA, USA.
11 Teunissen PJG," Success probability of integer GPS ambiguity rounding and bootstrapping", J Geod 72: 606-6121, 998   DOI   ScienceOn
12 한덕희, 박찬식, 황동환, 이상정, "Epoch-by-epoch GNSS 정밀 측위에서 실수해의 특성" 제어.로봇.시스템학회 논문지, 제15권 제12호, pp. 1254-1257, 2009.
13 Fenton, P. C., & Jones, J. (2000), "The theory and performance of Novatel inc.'s Vision Correlator", Proceedings of the International Technical Meeting of the Institute of Navigation, ION-GNSS, pp. 13-16, Long Beach, California, September 2005.
14 Jaewoo Jung, Per Enge, "Optimization of Cascade Integer Resolution with Three Civil GPS Frequencies", ION GPS'2000, Salt Lake City, September 2000.
15 Pratap Misra, Per Enge, Global Positioning system : Signals, Measurements, and Performance, 2nd Ed., Ganga-Jamuna Press, 2006.
16 Feng Y, Rizos C, Higgins M, "Multiple carrier ambiguity resolution and performance benefits for RTK and PPP positioning services in regional areas", In: Proceedings of ION GNSS 20th international technical meeting of the satellite division, pp 668-678, 25-28 September 2007, Fort Worth, TX, USA,