面向传感器网络的分布式定位算法研究

Research of the Distribute Localization Algorithm Orient to Wireless Sensor Network

针对无线传感器网络中利用信号强度难以精确定位目标的问题,深入研究了传感器网络定位测量原理和方法。通过对传感器节点的分布情况和信号强度的衰减特点,要研究并提出了利用传感器网络节点,在理想状态下分布式状态估计算法,实现对静态目标和运动目标的准确定位及运动轨迹跟踪。给出了在节点定位过程中各种信号参数之间的关系式,并对所提出的定位原理进行了证明。最后分别给出了针对静态目标和运动目标的定位计算式。

In order to solve the problem that using signal strength to locate the target accurately in the wireless sensor network is difficult, this paper deeply studies the measuring principle and methods of wireless sensor network localization.According to the distribution of sensor nodes and the attenuation character of signal strength, this paper has proposed a distributed state estimation under ideal conditions by using the wireless sensor network nodes, so as to realize the purpose of accurately locating both the static and dynamic target as well as tracking the movement locus.The relation formulas of various signal parameters in the node localization process are also be stated in this paper. What is more, the localization principle proposed in this paper has also been identified, thus the localization calculated methods for static and moving target has been obtained respectively.