摘要
节点定位是无线传感器网络的一项关键技术,为了提高精确度和避免使用对参数要求苛刻的传统算法,提出了一种新思路:基于ROAN(Ratio of Arrival Numbers,信号到达个数比)法。该法将原本需测节点间实际距离的难题,通过统计信号到达的数目,转化为计算距离比的模型,进而采用迭代法求解出位置信息。经过数学建模分析,证实了此法的可行性:通过NS-2仿真实验,验证了其相对TDOA等算法的精确性:在ZigBee平台的实践,表明了其低复杂度和高精度。
Node localization is a key technology for wireless sensor networks.In order to improve its accuracy and avoid using traditional algorithms which need precise parameters, a new localization method based on ROAN（ratio of arrival numbers） is proposed.The previous problem that actual distances between nodes are required to measured,is converted into the model of distances ratio by counting arrival numbers of the signal, which then is solved by means of iteration methods to get the location information. Through mathematical modeling and analyzing,the feasibility of this method was proved. When compared with TDOA and so on in the simulation experiment of NS-2,the method was verified that it could get higher accuracy.Furthermore,with the practical tests in the ZigBee platform,the results showed that the method was easy to implemented,but its precision was much higher.
