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高动态条件下SINS信息在GPS软件接收机信号捕获中的应用

Aerospace Control(2013)

Cited 23|Views12
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Abstract
目前卫星信号捕获主要采用自主搜索算法,在高动态环境下,由于信号存在较大的多普勒频移,且变化较为剧烈,导致自主搜索算法搜索范围变大、时间延长,通常不能满足高动态条件下的应用要求。本文在SINS/GPS松组合框架下,基于软件接收机的灵活性,利用SINS信息,使用FFT方法(并行码相位搜索算法)实现GPS信号的捕获,得到一种外部信息辅助搜索算法。仿真实验证明该搜索算法可快速有效地实现高动态GPS信号的捕获。该算法同样适用于GLONASS及我国的北斗卫星导航系统。
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Key words
Acquisition assisted by exterior signal,Loosely-coupled,Software-defined receiver,GPS,Self-determination search acquisition,Signal acquisition
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