Research on positioning enhancement scheme of CAPS via UWB pseudolite  

作　　者：XIAO Zhu BAI Jing MA GuanYi FAN JiangTao YI KeChu 

机构地区：[1]College oflnformation Science and Engineering,Hunan University,Changsha 410082,China [2]State Key Laboratory oflntegrated Service Networks,Xidian University,Xi'an 710071,China [3]Key Laboratory oflntelligent Perception and Image Understanding of Ministry of Education,Xidian University,Xi'an 710071,China [4]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第4期733-737,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 61173012. 61173036);the National Basic Research Program of China (Grant No. 2007CB815500);the National High Technology Research and Development Program of China(Grant No. 2007AA12z343);the State Key Laboratory of Integrated Services Networks Open Project (Grant No. ISN12-05);the Open Fund Project of Key Laboratory in Hunan Universities (Grant No. 11K017)

摘　　要：The positioning precision of the transmitting Chinese Area Positioning System(CAPS) is reduced due to the non-ideal distribution of the satellite constellation.Positioning and navigation enhancement methods are able to improve the reliability and accuracy of the positioning system,especially for users in special regions and special applications.In this paper,a positioning enhanced scheme based on ultra-wide band(UWB) pseudolite is proposed for CAPS.It is demonstrated that the link budget of UWB pseudolite satisfies the FCC's emission mask requirements.The localization algorithm of the enhanced CAPS is presented.The simulations indicate that the positioning precision of the proposed enhanced scheme is improved greatly,and the feasibility of the enhanced scheme is thus proved.The positioning precision of the transmitting Chinese Area Positioning System （CAPS） is reduced due to the non-ideal distri- bution of the satellite constellation. Positioning and navigation enhancement methods are able to improve the reliability and accuracy of the positioning system, especially for users in special regions and special applications. In this paper, a positioning enhanced scheme based on ultra-wide band （UWB） pseudolite is proposed for CAPS. It is demonstrated that the link budget of UWB pseudolite satisfies the FCC＇s emission mask requirements. The localization algorithm of the enhanced CAPS is presented. The simulations indicate that the positioning precision of the proposed enhanced scheme is improved greatly, and the feasibility of the enhanced scheme is thus proved.

关 键 词：CAPS UWB positioning enhancement PSEUDOLITE 

分 类 号：TN92[电子电信—通信与信息系统] TG750.2[电子电信—信息与通信工程]