摘要
为了提高转发式导航定位系统(CAPS)的单点定位精度,提出了一种利用已有的地面移动基站实现伪距差分定位的方法.该方法以检出多个基站处的伪距误差值为基础,用广义延拓插值模型建立测量点伪距误差修正的外推数据模型,从而求得测量点的伪距误差修正值,发送至用户,实现测量点的伪距差分修正.仿真分析表明,该方法能有效克服常规伪距差分改正精度受基线长度增加而造成精度递减的问题.CAPS和移动基站相结合,不仅能有效利用现有地面移动通信基站的资源,而且还能明显提高CAPS等卫星导航系统的定位精度.
This paper proposes a pseudo-range differential positioning method based on the existing mobile phone base stations to improve the point positioning accuracy in the Chinese Area Positioning System（CAPS）.The interpolation data for pseudo-range error correction in the generalized extended interpolation model are derived from the pseudo-range error value from several base stations to obtain the measuring point of the corrected pseudo-range error,and those data will be broadcasted to the user for pseudo-range differential correction.Simulations indicate that this method can overcome the fall in accuracy caused by the increase in base line length in conventional pseudo-range differential correction.The combination of the CAPS system and mobile phone base stations can effectively utilize the existing resources in mobile phone base stations.Moreover,it can also significantly improve the positioning accuracy of the CAPS.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2013年第1期129-134,共6页
Journal of Xidian University
基金
国家自然科学基金资助项目(61001109)
国家高技术研究发展(863)资助项目(2012AA120802)
中国科学院知识创新工程重要方向资助项目(KJCXZ-EW-J01
KGCXZ-EW-407-1)
关键词
伪距差分
广义延拓插值模型
地面移动基站
转发式导航定位系统
误差修正
pseudo-range differential positioning
generalized extended interpolation model
mobile phone base stations
Chinese area positioning system
error correction
