摘要
矢量跟踪算法是下一代卫星导航接收机算法。在弱信号跟踪方面,与传统的标量跟踪算法相比,矢量跟踪算法已被证实具有更高的跟踪灵敏度和精度。在多径抑制方面,矢量跟踪算法也具有性能优势。不过,矢量跟踪算法的多径抑制性能优势尚未被深入讨论。该文通过分析标量和矢量跟踪算法中跟踪架构和环路滤波器对定位解上多径误差的抑制能力,评估这2种算法的多径抑制性能。在仿真的2种典型多径场景即无遮挡的复杂场景和遮挡场景下,通过比较标量和矢量跟踪算法的定位解上多径误差,验证矢量跟踪算法的多径抑制性能优势。分析和仿真结果表明:在无遮挡的复杂场景下,矢量跟踪算法在抑制时变多径方面具有性能优势;在遮挡场景下,矢量跟踪算法的多径抑制性能优势更加显著。
Vector tracking algorithms will be used in next-generation satellite navigation receivers. Vector tracking algorithms have higher tracking sensitivity and higher tracking accuracy than the conventional scalar tracking algorithm for weak signal tracking. Moreover, the vector tracking algorithm also has the advantage of multipatb rejection. However, the advantage of multipath rejection in the vector tracking algorithm has not been discussed in depth. This study analyzes the abilities of the scalar and vector algorithm tracking architectures and loop filters to suppress multipath errors on position solutions to evaluate the multipath rejection performance of both algorithms. The multipath errors in the position solutions of the both scalar and vector tracking algorithms are compared for a complex scenario without blocking and a blocking scenario to show the advantage of the vector tracking algorithm for multipath rejection. The simulations show that for the complex scenario without blocking, the vector tracking algorithm more effectively rejects time-varying multipaths with the multipath rejection by the vector tracking algorithm even more significant for the blocking scenario.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第7期961-966,共6页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金青年科学基金项目(61101070)
关键词
卫星导航接收机
多径抑制
矢量跟踪
跟踪架构
环路滤波器
遮挡
satellite navigation receiver
multipath rejection
vector tracking
tracking architecture
loop filter
blocking
