选取环路切换策略的高动态载波跟踪算法研究

发布时间：2018-02-12 00:15

  本文关键词： 全球定位系统 切换策略 高动态 判决器 跟踪 抖动　出处：《现代防御技术》2017年02期 　论文类型：期刊论文

【摘要】：针对基于环路切换的传统GPS跟踪环路,会因为载体运动背景的复杂性而出现环路切换频繁,造成环路抖动和跟踪效果差的问题,提出了基于环路切换策略的高动态载波跟踪算法。该算法首先利用频率、相位判决器选择带有切换策略的子环路工作,然后利用切换策略模块去控制子环路对信号进行跟踪。仿真结果表明:载体在信号强度为45 d B·Hz,以5 g和10 g加速度分时间段做匀加速运动的场景下,基于环路切换策略的高动态载波跟踪算法能使得环路的切换次数和抖动现象明显减少,跟踪效果更佳。
[Abstract]:For the traditional GPS tracking loop based on loop switching, the loop switching occurs frequently because of the complexity of the moving background of the carrier, which results in the loop jitter and poor tracking effect. A high dynamic carrier tracking algorithm based on loop switching strategy is proposed. Then the switching strategy module is used to control the sub-loop to track the signal. The simulation results show that the carrier moves uniformly in the signal intensity of 45 dB 路Hz with acceleration of 5 g and 10 g respectively. The high dynamic carrier tracking algorithm based on loop switching strategy can reduce the frequency and jitter of the loop obviously, and the tracking effect is better.
【作者单位】： 重庆文理学院电子电气学院;
【基金】：重庆市教委科技项目(KJ131208) 重庆文理学院校级科研项目(Y2014DQ31)
【分类号】：P228.4
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本文编号：1504343