论文部分内容阅读
在室内、城市街道、停车场和森林等复杂环境中,卫星导航信号衰减大,接收信号弱,这对完成导航定位的接收机灵敏度提出了更高要求。文章根据微弱信号的特点,指出解决高灵敏接收技术的总的原则是进行能量累加。同时,从捕获和跟踪两个方面,分析了长时间的累加需要解决的问题,并介绍了现有的一些解决办法。高灵敏接收技术是目前卫星导航领域的研究热点之一。
In complex environments such as indoor streets, urban streets, parking lots and forests, the satellite navigation signals attenuate greatly and the received signals are weak, which puts higher demands on the receiver sensitivity for the navigation and positioning. According to the characteristics of weak signals, the article points out that the general principle of solving highly sensitive receiving technology is to accumulate energy. At the same time, from the aspects of capture and tracking, the problems that need to be solved for a long time are analyzed, and some existing solutions are introduced. Highly sensitive receiving technology is one of the hot spots in the field of satellite navigation.