基于偏差迭代的干扰源定位算法

摘要

Wireless sensor networks communication is susceptible to jamming attacks,which would make the net⁃work communication blocked or even palsied. In order to localize the position of the jammer and then eliminate it to guarantee the normal communication,we develop a novel algorithm,deviation of iterative localization. After deter⁃mining the initial estimate position,we calculate the deviation between the estimate position and the actual position through the position of three candidate nodes. If the deviation did not meet the accuracy requirement,iterated until it less than a specified threshold. The algorithm does not depend on the network complex hardware facilities or exter⁃nal device support. The problems of present methods about lager positioning error,higher energy consumption and the like have been improved. Simulation shows that our algorithm under the different network environments outper⁃forms existing algorithms.%针对无线传感器网络易受干扰攻击而导致网络通信受阻甚至瘫痪等问题，为确定干扰源位置进而消除干扰、保障网络正常通信，提出了偏差迭代定位算法。在确定初始估计位置后，通过参与定位的三个候选节点的位置信息即可求出干扰源估计位置与实际位置的大致偏差，对不满足精度要求的初始估计位置进行迭代直到偏差小于规定阈值为止。该算法不依赖网络本身或者外部设备等复杂的硬件设施和技术支持，对现存方法中存在的定位误差大、网络耗能高等问题进行了改善。仿真实验证明，该算法在不同网络环境下定位效果均优于现存算法。