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GPS L1C信号多径抑制性能分析
引用本文:刘志俭,周甍,楚恒林.GPS L1C信号多径抑制性能分析[J].全球定位系统,2009,34(6):9-12.
作者姓名:刘志俭  周甍  楚恒林
作者单位:北京5136信箱,北京,100094
摘    要:MBOC(multiplexed binary offset carrier)是GPS—GALILEO互用和兼容性工作组推荐的信号调制体制,其实现方式分为TMBOC和CBOC两种,其中TMBOC(6,1,4/33)已被GPSL1C信号所采用。多径是众多卫星导航系统应用的主要误差源之一,由于不具备时间和空间的相关性,无法通过差分技术消除。本文基于窄相关技术和Double—Delta技术对TMBOC(6,1,4/33)的抗多径性能进行了分析,并与BPSK(1)及BOC(1,1)进行了对比。在同等条件下,TMBOC(6,1,4/33)的抗多径性能优于或等同于BPSK(1)及BOC(1,1)。

关 键 词:TMBOC  窄相关  Double—Delta

Multipath Mitigation Performance Analysis for GPS L1C Signals
LIU Zhi-jian,ZHOU Meng,CU Heng-lin.Multipath Mitigation Performance Analysis for GPS L1C Signals[J].Gnss World of China,2009,34(6):9-12.
Authors:LIU Zhi-jian  ZHOU Meng  CU Heng-lin
Institution:LIU Zhi-jian, ZHOU Meng, CU Heng-lin (Beijing P. O. Box 5136, Beijing 100094,China )
Abstract:Multiplexed Binary Offset Carrier (MBOC) spreading modulation has been recommended by the GPS-GALILEO Working Group on Interoperability and Compatibility. Time-multiplexed BOC (TMBOC) and composite BOC (CBOC) are two fundamentally different approaches to realize the MBOC. The TMBOC(6,1,4/33) has been adopted by GPS LIC signal. Multipath is one of the main sources of error for many Global Navigation Satellite System(GNSS) applications. It cannot be elimina- ted by differential techniques like DGPS because it changes in a random way, being uncorrelated through space and time. Performance analysis of multipath mitigation has been done for TMBOC (6,1,4/33), BPSK(1) and BOC(1,1) based on narrow correlator and Double-Delta techniques. Under the same conditions, TMBOC(6,1,4/33) is less sensitive to multipath.
Keywords:TMBOC  Double-Delta
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