GPS L5 Acquisition Schemes for Rapid Code Phase Search and Fine Doppler Determination

GPS L5 신호에서 신속한 코드위상 재검색 및 정밀 도플러 결정 기법

  • 주인원 (한국전자통신연구원 위성관제.항법연구팀) ;
  • 최승현 (한국전자통신연구원 위성관제.항법연구팀) ;
  • 김재현 (한국전자통신연구원 위성관제.항법연구팀) ;
  • 신천식 (한국전자통신연구원 위성관제.항법연구팀) ;
  • 이상욱 (한국전자통신연구원 위성관제.항법연구팀) ;
  • 김재훈 (한국전자통신연구원 위성관제.항법연구팀)
  • Received : 2009.08.27
  • Accepted : 2009.12.09
  • Published : 2009.12.31


According to the GPS modernization, L5 is the third civilian GPS signal, broadcasts in a radio band reserved exclusively for aviation safety services. However, as the code length of GPS L5 is ten times longer than that of GPS L1, the acquisition processing time in GPS L5 takes longer than that of L1. This characteristics make the code phase detected initially change and cause the tracking loop to unlock. In order to overcome this problem, this paper proposes L5 acquisition schemes for the rapid code phase re-search and the fine doppler determination. The feasibility of the proposed scheme is demonstrated through the simulation results.


Supported by : 정보통신연구 진흥원


  1. 김재훈, 이상욱, 이점훈, 신천식, 정성균, 장동필, 위성항법 지상국 및 탐색구조단말기 기술 개발, 위성통신과 우주산업, 제 16권, 제 1호
  3. S. Gunawardena, Z. Zhu and M. Brrasch, First Look : Observing the GPS L5 Test Transmission from SVN49 Using Software Radio Processing, Inside GNSS, May/June 2009, pp. 22-29.
  4. ICD-GPS-705. Navstar GPS Space Segment/User Segment L5 Interfaces (Rev 2, 02-Dec-02)
  5. Wim De Wilde, Jean-Marie Sleewaegen, Andrew Simsky, Christophe Vandewiele, Edda Peeters, Jan Grauwen, Frank Boon, New Fast Signal Acquisition Unit for GPS/Galileo Receivers, ENC GNSS 2006, Manchester, 7-10 May 2006
  6. James Bao-Yen Tsui, Fundamentals of Global Positioning System Receivers : A Software Approach, Wiley-Interscience, 2005
  7. 주인원, 신천식, 이상욱, 김재훈, Giove-B 위성 E5a Secondary Code 결정 및 신호처리 결과, 한국항공운항학회지, 16권 4호, 12, 2008.