一种改进的NLOS消除算法

Improved algorithm of mitigating NLOS error for mobile location

在蜂窝移动定位中,由于移动台与基站之间电波传播的视距(LOS)路径被阻挡,电波只能以非视距(NLOS)方式传播,由此对电波测量值TOA、TDOA等带来较大的误差分量。用带有较大NLOS误差的TOA、TDOA测量值估计移动台位置,必然造成定位精度的显著下降。本文在对NLOS传播特性和机理分析的基础上,提出一种改进的NLOS误差消除算法,仿真结果表明,该算法能够显著提高定位精度,满足E-911定位要求。

In cellular mobile position systems, the LOS path which connects the BS and MS is often blocked and the communications can only be conducted through reflected. So the great false components in measuring TOA, TDOA can occur. Mobile position using TOA, TDOA measuring with serious NLOS error will inevitably cause precise decreasing in positing. In this paper,a new method is proposed to mitigate the NLOS error and bias the range measurements to their true values for location estimation algorithm operation. The simulation results show that the method can effectively improve the location precision and can meet the E-911 position requirements.