基于系统辨识的电台类型分类实验研究

Experimental Investigation of Radio-Types Classification Based on System Identification Technique

提出了电台类型识别的必要性和研究思路。在深入分析数字调制系统的基础上,关注系统的线性特性,尝试以系统辨识的方法建立调制系统的黑盒模型,并提出将所得模型频率响应的差异作为区分电台类型的依据。最后对三种型号的电台在相似环境下用同一接收机进行了实验,结果表明辨识所得系统的幅频和相频曲线确实存在较明显的差异,可以将其作为特征对电台类型进行有效分类。

The necessity and methodology of Radio-Type Recognition is proposed in this paper. With an analysis of the digital modulation system, the linear characteristic of the system is concerned and subsequently a black-box model of the system is built by using system identification technique. The difference among the frequency responses of the estimated models is used to classify different radio types. Finally, an experiment is carried out on three-type radios in similar circumstances with a certain receiver. Results show the dissimilarity of the curves. And the raido-types can be classified effectively by using the frequency response as a feature.