摘要
分别推导了考虑及不考虑各TDOA测量值相关性条件下多边形中心位置的GDOP与BS数目之间的关系.给出了NLOS环境下采用TDOA和TDOA/AOA定位法的GDOP计算方法.理论分析和仿真结果表明,TDOA测量值之间存在的相关性对GDOP有不利影响;在AOA测量值标准差小于5°时,采用TDOA/AOA定位法能有效改进GDOP,提高对MS的定位性能.
The relation between GDOP (geometry dilution of position) and BS (base station) number at the center of a polygon was derived with and without the correlativity between TDOA (time difference of arrival) measurements considered. A GDOP method for computing TDOA and TDOA/AOA (angle of arrival) under NLOS (non-line-of-sight) environment was presented. Theoretical analysis and simulation results show that the correlativity between TDOA measurements increases GDOP, and location performances are improved and GDOP is decreased by TDOA/AOA method if the standard error of AOA measurement is less than 5°.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2005年第2期184-188,共5页
Journal of Southwest Jiaotong University
