【摘要】 基于窄带无线信号的路径损耗和阴影衰落,直接建立多个锚节点值与待定位节点未知坐标估计量的解析关系,避免传统RSSI定位方法中常用的对两节点距离量的直接求解,减少信息丢失,提高定位精度;仿真分析了锚节点数量、遮挡因子、路径损耗指数等对定位精度的影响;采用CC2530无线传感芯片实现基于RSSI的无线传感器网络定位系统;系统采用8个锚节点分别在边长4m和10m的两个正方形区域内展开定位实际测试,结果显示其平均定位误差可分别降到0.175m和0.824m。更多还原

【Abstract】 Based on path loss and shadow fading of narrowband wireless signal,it directly develops analytical relationship of multiple RSSI values and unknown coordinate of located nodes by avoiding traditional RSSI locating method solves the distance between two nodes in order to reduce the loss of information and improve location accuracy.It gives the impact on location accuracy under different numbers of anchor nodes,different blocking factors,different path loss exponents and other factors in simulation.And it also shows the implementation of wireless sensor network location system based on RSSI using radio frequency chip CC2530.After 8anchor nodes,4 meter and 10 meter two square areas locating test,the results show that average location error can be reduced to 0.175 meter and 0.824meter。更多还原