卫星导航技术专题讲座(四) 第7讲 卫星导航高灵敏接收技术  

High-Sensitivity GNSS Receive Technology

作　　者：李仰志[1] 程剑[2] 赖广锋[3] 罗奎[3] 周德志[4] 

机构地区：[1]解放军理工大学通信工程学院研究生2队 [2]解放军理工大学通信工程学院训练部 [3]解放军理工大学通信工程学院研究生4队 [4]中国人民解放军92980部队

出　　处：《军事通信技术》2010年第2期95-99,共5页Journal of Military Communications Technology

基　　金：国家高技术研究发展计划(863计划)资肋项目(2008AA12Z307)

摘　　要：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。High-sensitive receive technology is a hot spot in satellite navigation research.The signal received in the GNSS receiver is significantly attenuated when used in challenging environments,such as indoor situations,urban canyons,parking lots and forests,where a high-sensitivity receiver is needed for positioning.The key technology was analyzed for the long time integration in signal acquisition and tracking respectively,and some currently-methods introduced.The paper indicates that the principle to resolve the high-sensitive receiving is energy accumulation,according to the characteristics of the weak signal.

关 键 词：卫星导航 弱信号 高灵敏度接收 

分 类 号：TN96[电子电信—信号与信息处理]