采用重构吸引子的辐射源个体识别技术

Specific emitter identification using reconstructed attractors

为解决现有基于相空间个体识别方法面临重构特征矢量维数高、计算效率低、鲁棒性差等问题,从非线性动力学角度出发,构建了基于重构吸引子的辐射源个体识别框架,并在此框架内提出了基于等距映射的辐射源个体识别技术。该技术采用等距映射从相空间中重构辐射源吸引子,可以更低的维度描述辐射源系统动力学特性,反映辐射源个体的“指纹”特征。实验表明该方法识别准确率更高、效率更高、听鲁棒性更强。

In order to solve the problems of high dimension of reconstructed feature vector,low computational efficiency and poor robustness of existing phase space based individual recognition methods,SEI(specific emitter identification)framework based on reconstructed attractors was proposed from the perspective of nonlinear dynamics.Within the proposed framework,a novel SEI technology based on Isomap(isometric mapping)was developed.The technology used Isomap to reconstruct the emitter attractor from phase space,which can describe the dynamic characteristics of the emitter system in a lower dimension and reflect the“fingerprint”characteristics of the emitter individual.Experiments show that the proposed method can achieve higher accuracy,higher efficiency and better robustness.