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GPS Ll/L2C 상관기를 위한 빠른 신호 획득 기법
임덕원,문승욱,박찬식,이상정,Lim Deok-Won,Moon Sung-Wook,Park Chan-Sik,Lee Sang-Jeong 제어로봇시스템학회 2006 제어·로봇·시스템학회 논문지 Vol.12 No.8
The L2 Civil Signal (L2CS) will be transmitted by modernized IIR(IIR-M), IIF and all subsequent GPS satellites. It contains two codes of different length; CM code contains 10,230chips, repeats every 20milliseconds and is modulated with message data, and CL code contains 767,250chips, repeats every 1.5second Z-count and has no data modulation. And the message data is encoded for Forward Error Correction(FEC). The long code length is useful for weak signal, but it also requires very long acquisition time. Therefore, the structure of GPS Ll/L2C Correlator and the fast acquisition scheme are proposed in this paper.