摘要
针对单GPS定位系统存在定位盲区而无法实现定位的难题,结合基于DTMB标准的数字电视定位系统的优势,给出GPS与DTMB融合定位新方法,研究多种信号源参与定位的导航精度变化,并仿真分析4种不同场景下精度因子变化大小,通过理论分析和仿真实验证明了DTMB信号的参与改善了卫星的几何布局,减少了精度因子值,同时当参与的DTMB信号越多时,精度变化曲线更加平滑,精度因子取值平均在3左右,可以满足实际导航定位中对精度的需要。
In view of the deficiency of location failure caused by single GPS positioning system, considering the advantage of digital television positioning system based on DTMB standard, the integrated navigation positioning method combining GPS and DTMB is presented, the navigation accuracy of multiple source signals in location system is studied, and the change of precision factor in four different scenarios is simulated and analyzed. Theoretical analysis and simulation results prove that DTMB signal improves satellite geometry layout, reduces the dilution of precision value, at the same time, when there is more DTMB signals, the accuracy of curve is more smooth, dilution of precision is about 3. It can satisfy the actual need for precision navigation and positioning.
出处
《电视技术》
北大核心
2014年第7期133-135,173,共4页
Video Engineering
基金
云南省教育厅科学研究基金项目(2013Y017)
曲靖师范学院校级青年项目(2012QN022
2012QN023)
关键词
全球定位系统
数字电视定位系统
组合导航
精度因子
global positioning system
digital TV positioning system
combination navigation
dilution of precision
