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该文首次研究了通信辐射源个体特征对工作频率变化的鲁棒性。针对一类导频静噪的调频FM辐射源,提取调频指数Mf作为识别辐射源个体身份的特征。对4个实际调频辐射源信号样本的实验表明:在工作频率不变的条件下,Mf的精确估计值可以有效地对辐射源个体身份进行识别;在不同工作频率下,同一个辐射源的Mf值会发生较大变化,从而在一定程度上限制了该特征的应用。
This paper firstly studies the robustness of individual characteristics of communication radiation source to the variation of operating frequency. For a class of pilot muting FM FM radiators, the FM index Mf is extracted as a feature to identify the individual identity of the radiation source. Experiments on four samples of real frequency modulated radiation source signal show that under the condition of constant operating frequency, the accurate estimation of Mf can effectively identify the individual identity of the radiation source. Under different operating frequencies, the Mf The value will have a greater change, which to some extent limits the application of this feature.