基于证据理论的无线网络干扰定位研究

Evidence Theory Based Jamming Positioning in Wireless Networks

干扰定位是无线网络优化的内容之一,应用测试仪表进行干扰定位具有时滞性且成本高;在分析网络不同干扰及各自引起的网络状态特征的基础上,应用证据理论对不确定性的网络特征进行融合计算,实时推理出不同潜在干扰源的置信度,并选取置信度最大的干扰为当前既在干扰源;该方法首先确定出是内部干扰还是外部干扰,然后对具体的干扰源进行精确定位;仿真结果表明,该方法在定位过程中的不确定性降低,有利于实时干扰定位实现。

Jamming positioning is one of the optimization elements in wireless network.The jamming positioning method,which using the apparatus,has the positioning delay and high cost.Based on the analysis of the network jamming and their different network state characteristics,the network characteristic evidences with uncertainty can be fused using the evidence theory.The confidence degrees of different interferences will be obtained from the fused evidences.And the jamming with the maximal probability will be regarded as the current jamming of wireless network.The proposed method first determines that the jamming is an internal jamming or external jamming.Then the specific jamming will be positioning accurately.Simulation results showed the process of jamming positioning reduced the uncertainty of evidences.And the jamming could be positioned in real-time by the method.