摘要
基于GPS/BD兼容高灵敏度导航产品开发和产业化项目,对经典载波跟踪环进行修改,设计实现了高灵敏度跟踪环路。将传统的单点积分数据,转化成一列数据,对该数据进行FFT变换后,可提高载波频率的估计精度,从而提高系统的跟踪灵敏度。并对高灵敏度跟踪环路进行仿真分析,证明高灵敏跟踪环路对弱信号的跟踪能力。
Based on development and industrialization projects of GPS / BD compatible high-sensitivity navigation product, the classic carrier tracking loop is modified in this paper to achieve high-sensitivity tracking loop. The key idea is to transform the traditional single-point integration data into a string data. After FFT transformation of the data, the estimation accuracy of the carrier frequency can be improved, thereby increasing the system tracking sensitivity. The high-sensitivity tracking loop is al- so analyzed and simulated in this paper to prove its tracking capacity for tracking weak signals.
出处
《现代电子技术》
2013年第11期89-91,94,共4页
Modern Electronics Technique
关键词
高灵敏度
载波跟踪
载波环
码环
high-sensitivity
carrier tracking
carrier loop
code loop
