一种基于接收信号强度和到达角的三维组合定位方法

A3-D Combined Localization Method Based on RSSs and AOAs

现有仅单独利用接收信号强度(RSS)或到达角(AOA)信息进行三维定位时,存在较大的RSS或AOA估计误差情形下,定位性能较差。针对这一问题,提出基于RSS和AOA的三维组合定位体制,首先建立原始非线性定位方程,然后针对该方程利用一阶泰勒展开进行线性近似,进而提出基于加权最小二乘的求解方法,以较低的计算复杂度实现了高精度定位。理论分析和仿真实验结果表明,与现有仅基于RSS或AOA的方法相比,在大的角度和接收信号强度测量误差的情形下,本文所提方法具有更高的定位精度。

The methods of 3-D location which only utilize the information of received signal strength(RSS)or angle of arrival(AOA)will result in worse localization performance because of large errors in RSS or AOA estimations.Aiming at the problem,this paper presents a 3-D combined localization system based on RSS and AOA.At first,an original nonlinear localization equation is established,then the first order Taylor expansion is applied to this equation for linear approximation,and then the solution based on weighted least square(WLS)is proposed,which can achieve high accuracy position with lower computational complexity.Theory analysis and simulation experiment result show:compared with RSS only or AOA only method,for large errors of AOA and signal strength measurements,the proposed method can possess higher position accuracy.