非视距环境中TOA/AOA混合定位方法

为了减少非视距对定位估计的影响,提出了一种新到达时间/到达角信号的抗非视距混合定位方法,该方法假设首先到达每个基站的信号路径经历了唯一的一次反射,采用约束非线性优化方法来定位移动台,将基站和移动台的几何分布关系和移动台的位置范围作为约束条件,并使用粒子群优化技术来寻找全局最优解,然后计算测量噪声并利用迭代过程进一步的提高定位精度,通过对比仿真表明该算法的有效性。

A TOA/AOA hybrid location method in non-line-of-sight environment

In order to minimize the location estimation error to mitigate the NLOS propagation effect, a novel time of arriva1/angle of arriva1 wireless position scheme in NLOS environment is proposed.Which assumes that the first arriving path at each base station experiences a single dominant scatter, location of the mobile station is accomplished by means of a nonlinear optimization procedure under nonlinear constraints, the geometry of the cell layout and the measured range circles to serve as constraints. The part...