한국항해항만학회:학술대회논문집 (Proceedings of the Korean Institute of Navigation and Port Research Conference)

한국항해항만학회 (Korean Institute of Navigation and Port Research)
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GPS 미약신호 처리 알고리즘

Acquisition Algorithm for GPS C/A Coded Weak Signals

  • 우제르 (한국전자통신연구원, 융합기술연구부문, 위치정보기술연구팀) ;
  • 최완식 (한국전자통신연구원, 융합기술연구부문, 위치정보기술연구팀)
  • Uzair, Ahmad (IT Convergence Technology Research Lab, Positioning Information Technology Research Team, ETRI) ;
  • Choi, Wan-Sik (IT Convergence Technology Research Lab, Positioning Information Technology Research Team, ETRI)
  • 발행 : 2011.06.09
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초록

This paper concerns to the acquisition of Global Positioning System L1 C/A coded signals. It specifically addresses the issues of acquiring very low power signals which are attenuated due to special circumstances such as indoor environment or forest canopy etc. The proposed post-processing algorithm applies modified signal folding coherent integration scheme on weak signal record. It dynamically compensates the doppler effect on the length of C/A code before integrating the signal power. Experimental results show effectiveness of the algorithm on weak GPS signals recorded in a real environment.

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