一种适用于无线传感器网络定位的新方法

New location method for wireless sensor networks

针对无线传感器网络,提出了一种基于恒模算法(constant modulus algorithm,CMA)的新定位方法(CMA-MAP)以及它的一种增强型算法(CMA-MDS)。其中CMA-MAP算法利用通信节点间距离的恒模性质,通过计算求出满足网络拓扑结构的多个局部最优解,并通过比较获得全局最优解。增强型算法(CMA-MDS)则是恒模算法与多维尺度分析技术相结合的一种新方法,模拟表明CMA-MDS可以提高估计的精度,且具有很强的鲁棒性。

To obtain accurate position estimation in wireless sensor networks （WSN）, a new method-CMA-MAP, based on constant modulus algorithm （CMA）, and an enhanced algorithm CMA-MDS are presented. Taking advantage of the property of constant modulus of the distance between communication nodes, CMA-MAP first finds out a number of local optimum solutions to satisfy the net topology. Then, the global optimum solution is obtained by comparing above local optimum solutions. CMA-MDS is a combination of CMA and multidimensional scaling （MDS） technique. Simulation results show that CMA-MDS can improve the precision of estimation with great robustness.