한국위성정보통신학회논문지 (Journal of Satellite, Information and Communications)

한국위성정보통신학회 (Korea Society of Satellite Technology)
권호 표지

GPS L1/갈릴레오 E1 복합신호처리를 통한 위치정확도 향상 연구

A Study on Enhanced Accuracy using GPS L1 and Galileo E1 Signal Combined Processing

  • 신천식 (ETRI 위성항법연구팀) ;
  • 이상욱 (ETRI 위성항법연구팀) ;
  • 윤동원 (한양대학교 공과대학 전자컴퓨터통신공학과)
  • 투고 : 2011.05.04
  • 심사 : 2011.06.07
  • 발행 : 2011.06.30
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초록

본 논문은 GPS L1신호와 갈릴레오 E1 신호를 복합 신호처리를 통한 위치정확도 성능향상 연구결과를 제시하였다. GNSS 수신기에서의 신호획득 및 추적과정의 성능 향상시키기 위해 복수개의 누적기, 판별기 및 루프 필터 모듈을 적용하였고, 소프트웨어 측정 결과와 하드웨어 측정결과를 성능 비교하였다, 또한 추적과정에 대한 성능비교는 정확도와 민감도 측면에서만 다루었으며 갈릴레오 E1 신호처리를 위한 DLL(Delay Lock Loop) 판별기는 power early late 타입을 적용하여 성능을 검증하였다.

In this paper, we present the enhancement results such as availability and accuracy using the GPS L1 and Galileo E1 signal combination. To enhance the acquisition and tracking performance of signal processing in GNSS receiver. several tracking loops with integrator, discriminator, and loop filter module are applied. Also, this paper presents the performance comparison results between prototype receiver equipped with hardware board and software receiver. Also the tracking loop performance of real hardware receiver is verified by comparing with tracking accuracy, sensitivity occurred by the Spirent simulator. Especially, to process the Galileo E1 signal, it is used the a power early late type which is the typical type for DLL discriminator.

키워드

참고문헌

  1. Humphreys, T. E., Psiaki, M. L., Kintner, Jr., P. M., Ledvina, B. M., "GNSS Receiver Implemetation on a DSP: Status, Challenges, and Prospects" 19th international Technical Meeting, ION, Fort Worth, September, 2006.
  2. J. Bao and Y. Tsui, "Fundamentals of Global Positioning System Receivers A Software Approach," Willey, second edition, 2005.
  3. Kaplan, Elliot D., "Understanding GPS:Principles and Applications," Artech House.
  4. Van Nee, J.R. & Coenen, J.R.M., "New Fast GPS Code-Acquisition Technique Using FFT," Electronics Letters, Vol.27.2, Jan., 1991.
  5. Manandhar, D., Y. Suh, R. Shibasaki, "GPS Signal Acquisition and Tracking-An Approach towards Development of Software-based GPS Receiver," Technical Report of IEICE, ITS2004, July 16, 2004.
  6. Galileo Open Service, Signal In Space Interface Control Document, OS SIS ICD, Draft 1, ESA, European GNSS Supervisory Authority 2008.
  7. P.-L Normark, C. Stahlberg,"Hybrid GPS/Galileo Real Time Software Receiver," Proceedings of ION GNSS 2005, Long Beach, Sept., 2005.