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GPS L5 신호에서 신속한 코드위상 재검색 및 정밀 도플러 결정 기법
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- Issue Date
- 2009-12
- Citation
- 한국항공운항학회지, v.17, no.4, pp.17-24
- ISSN
- 1225-9705
- Publisher
- 한국항공운항학회
- Language
- Korean
- Type
- Journal Article
- Abstract
- 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.
- KSP Keywords
- Aviation Safety, Code length, GPS signal, Tracking loop, code phase, processing time, simulation results