摘要
为了克服原有抗多径算法在偏移二进制载波(BOC)信号上性能不如粗捕码(coarse/acquisition code,C/A码)的缺点,并消除BOC信号在跟踪时特有的多峰模糊特性,将一种新的参考码应用在BOC信号的跟踪中,并与窄相关器以及高分辨相关器(HRC)技术进行了比较,分别给出了多径误差包络,从仿真结果中得出了最佳参考码码型,并根据最佳参考码分析了成形(Shaping)相关器的噪声性能。Shaping相关器消除了多峰模糊的特点,并在多径误差包络上要优于窄相关器以及HRC算法,也很容易在原有基础上修改实现。该研究为未来的导航接收机中Shaping相关器的应用打下了坚实的基础。
Existing algorithms are worse when applied to binary offset carrier（BOC） signals than for the coarse/acquisition（C/A） code in GPS receivers.This paper presents a new reference code for BOC signal tracking and gives the multipath error envelope compared to the narrow correlator method and high resolution correlator.The best reference code is determined by simulations and the noise performance of the best reference code is analyzed.The multi-peak fuzzyness is cancelled by a Shaping correlator.The performance of the Shaping correlator＇s multipath mitigation is better than the narrow correlator and the high resolution correlator.This correlator is easy to realize so the Shaping correlator can be easily used in future navigation receivers.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期180-183,共4页
Journal of Tsinghua University(Science and Technology)
基金
国防科工委专项资助课题
关键词
扩频通信
全球导航卫星系统(GNSS)
相关器
多径抑制
spread spectrum communication
global navigation satellite system（GNSS）
correlator
multipath mitigation
