减小超宽带穿墙定位中NLOS误差的方法

NLOS error mitigation for ultra-wideband through-wall localization

超宽带穿墙定位中,需考虑NLOS传播效应对定位结果的影响以提高定位精度。在对室内目标穿墙定位的应用中,为了减小由NLOS传播引起的定位误差,建立了信号的穿墙传播模型,基于该模型提出了一种NLOS误差减小方法,该方法能够有效减小误差并提高对目标的定位精度。文中推导了定位误差与几何的关系,为实际系统的布设提供了理论依据。仿真结果验证了基于传播模型的NLOS误差减小方法对提高定位精度的有效性。

The effect of Non-Line of Sight （NLOS） propagation on positioning accuracy should be taken into account for higher accuracy of Ultra-Wideband （UWB） through-wall localization. For the application of locating target be- hind wall, to mitigate the NLOS error, a NLOS error mitigation based on through-wall propagation model is proposed in this paper. With this approach, the positioning error due to NLOS propagation is effectively mitigated, and the positioning accuracy is greatly improved. The corresponding relationship between positioning error and geometric configuration is formulated, which provides an important reference for system design. The simulation results verify the validity of im- proving positioning accuracy with the NLOS mitigation based on through-wall propagation model.