摘要
对GPS的传统跟踪环路进行了分析,指出传统的载波环路不能兼顾环路的灵敏度和动态。而且,文中对多径的处理进行了分析。为了跟踪低动态的GPS弱信号,保持室内外导航定位服务的连续性,使用了基于扩展卡尔曼滤波器的矢量延迟环路,经仿真验证,即使在卫星信号消失的时候,仍然能够保持良好的导航信号跟踪,在卫星信号恢复之后不用重新捕获,并且仍能获得较好定位误差。
Traditional GPS tracking loop analysis can not take into account that traditional carrier loop sensitivity and dynamic. Moreover, this paper analyzed the processing of multipath. GPS weak signal tracking low dynamic, and to maintain the continuity of indoor and outdoor navigation and positioning services using the vector delay loop based on the extended Kalman filter, the simulation results, even when the satellite signal disappears, and still be able to maintain a good navigation signal tracking, do not have to re-capture the satellite signal recovery, and still get better positioning error.
出处
《信息技术》
2013年第9期23-27,共5页
Information Technology
基金
国家科技重大专项项目(2010ZX03002-007
2010ZX03020-007-01
2010ZX03005-003)
