本程序是实现基于UWB的节点位置进行定位及对算法仿真，采用基于到达时间TOA　　　
算法仿真了UWB信号在IEEE802.15.4a信道下的发射、衰减、信道冲击响应、加噪声　
相关接收、节点定位；参考节点个数选择为3个，定位坐标采用最小二乘法求解(This program is to realize the node location based on UWB and to simulate the algorithm
The algorithm simulates the transmission, attenuation, channel impulse response and noise of UWB signal in ieee 802.15.4a channel
Relevant reception and node positioning;The number of reference nodes is 3, and the positioning coordinates are solved by the least square method)