说明：  线性化法仿真三个参考节点定位一个定位节点，随机噪声均方差随机分布在[4,10]，多径效应，权重分布在[0.85，1]。
(Linearization method simulation of three reference nodes positioning a positioning node, the variance of random noise are randomly distributed in [4,10], multi-path effects, the weight distribution in [0.85,1].)