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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.1
- 수록면
- 61 - 67 (7page)
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초록· 키워드
오류제보하기
The GPS new civil signal is modulated on the L2 carrier at a frequency of 1227.6㎒. The L2C signal is composed of two multiplexed code signals, which include CM code with a 10,230 chip sequency repeating every 20ms, and CL code which has a 767,250 chip sequency repeating every 1.5 seconds. Thus, the new civil signal have much improved cross correlation properties so that the position fixing can be possible even with very weak signals. However, it requires very long acquisition time because of its long code length. This paper presents an efficient signal acquisition method for L2C AGPS receiver. Snapshot mode and coarse time assistance are assumed and total integration time is given by 1.5 sec. By SNR worksheet and computer simulation, it is proven that L2C signal can be acquired with very weak power less than -150㏈m. Considering the acquisition time and the sensitivity, it is recommended that the highest power signal is acquired with CM code first to reduce TTFF. By the timing synchronization, at this time, search space of the code phase for other signals can be greatly reduced so that CL code can be used in signal acquisition to maximize sensitivity with small computation.
목차
Abstract
Ⅰ. 서론
Ⅱ. GPS L2C 신호 특성 및 AGPS 수신기의 손실 요소 분석
Ⅲ. L1 C/A 신호와 L2C 신호를 이용한 AGPS 수신기의 수신감도 분석
Ⅳ. 시뮬레이션
Ⅴ. 결론
참고문헌
참고문헌 (7)
참고문헌 신청
1. [단행본] - F. V. Diggelen / 2009 / AGPS: Assisted GPS, GNSS, and SBAS / Artech House
2. [학술대회논문] - R. D. Fontana / 2001 / The new L2 civil signal / Proc. of th 11th International Technical Meeting of the Satellite Division of the Institute of Navigation : 617 ~ 631
3. [학술지(정기간행물)] - 임 덕 원 / 2006 / GPS L1 L2C 상관기를 위한 빠른 신호 획득 기법 / 제어.로봇.시스템학회 논문지 12 (8) : 765 ~ 772
4. [학술지(정기간행물)] - D. J. Cho / 2004 / An assisted GPS acquisition method using L2 civil signal in weak signal environment / Journal of Global Positioning Systems 3 (1) : 25 ~ 31
5. [학술대회논문] - A. R. A. Moghaddam / 2006 / Exploiting the orthogonality of L2C code delays for a fast acquisition / ION GNSS 2006, Fort Worth, TX : 1233 ~ 1241
2. [학술대회논문] - R. D. Fontana / 2001 / The new L2 civil signal / Proc. of th 11th International Technical Meeting of the Satellite Division of the Institute of Navigation : 617 ~ 631
3. [학술지(정기간행물)] - 임 덕 원 / 2006 / GPS L1 L2C 상관기를 위한 빠른 신호 획득 기법 / 제어.로봇.시스템학회 논문지 12 (8) : 765 ~ 772
4. [학술지(정기간행물)] - D. J. Cho / 2004 / An assisted GPS acquisition method using L2 civil signal in weak signal environment / Journal of Global Positioning Systems 3 (1) : 25 ~ 31
5. [학술대회논문] - A. R. A. Moghaddam / 2006 / Exploiting the orthogonality of L2C code delays for a fast acquisition / ION GNSS 2006, Fort Worth, TX : 1233 ~ 1241
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