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Performance of TOA and TDOA in a Non-homogeneous Transmitter Network Combining GPS and Terrestrial Signals
Performance TOA TDOA Non-homogeneous Transmitter GPS Terrestrial Signals
2015/6/25
The time of arrival (TOA) and the time difference of arrival (TDOA) measurements are transformable to each other without a loss of information regarding positioning and thus the position estimations b...
为了提高单独时差或频差定位精度,提出利用最大比合并技术合并TDOA和FDOA方程基于最大似然原理的独立定位解, 形成联合定位,合并系数由TDOA和FDOA方程单独定位方差的克拉美罗界对应的Fisher信息逆矩阵来定义。仿真和理论分析表明:该算法的定位性能在有无地球约束条件下均优于单独定位性能,并且逼近克拉美罗界。