基于射频推断机制的WSN网络终端确定算法

WSN network terminal ddentification algorithm based on RF inference mechanism

为解决当前WSN网络终端确定算法中存在的定位过程困难、精度水平较低且定位时延难以达到实际应用水平等不足,提出了一种基于射频推断自适应机制的WSN网络终端确定算法。首先,通过对WSN网络终端的连通性能进行研究,采取基于强度信息的射频推断自适应机制,对全部网络节点性能进行排序推断,降低信号定位过程中存在的控制难题,提高信号获取过程中的鲁棒性;随后引入线性寻错机制,通过线性微分方式求取坐标定位精度的零点,显著提高了定位的精度,降低了定位过程中的精度误差。仿真实验表明,当前广为适用的共线度精度定位算法(collinear precision positioning algorithm,CPP算法)相比,所提算法具有更高的定位精度与更低的坐标误差,以及更短的定位时延。

In order to solve the promblem in existing algorithms of the current WSN network terminal, that it is difficult to determine in the positioning process, and the accuracy level is low, and the positioning delay is difficult to meet actual application level, put forward an algorithm for determining the WSN network inference mechanism based on adaptive RF terminal. First of all through the communication performance of WSN network terminal research, adopts RF adaptive mechanism based on inference intensity information for all the network nodes performance sort inference, reduce the con- trol problem in the process of positioning signal, and improve the robustness in the process of signal acquisition; then in- troducing the linear search fault mechanism, the differential mode for zero the positioning accuracy, greatly improves the positioning accuracy, reduce the error in the process of positioning. Simulation results show that compared with the cur- rent algorithm this algorithm is widely applicable positioning accuracy of collinear, has the advantages of high precision, coordinate error is small, short time delay positioning significant advantages, has good performance in practical applica- tion in the field of engineering.