一种用于无线发射机识别的特征矢量构造方法

A Method of Feature Vector Construction Used in Wireless Transmitter Recognition

无线发射机识别的研究中存在一种微小差别ARMA系统的分类问题,该问题把发射机基带到接收机基带部分建模为一个ARMA系统,由相同标称值构成的同一系列的无线发射机对应相同结构、零点极点有细微差别的ARMA系统。本文研究了ARMA系统间零极点差别与分子、分母多项式系数差别之间的关系,提出了采用分子或分母多项式的第二个系数构造特征矢量,从而增大微小差别ARMA系统的类间距离的新方法,给出了一个仿真实例。本文对后续的识别研究及相关的通信信道识别研究具有参考价值。

A kind of classification issues of subtle difference ARMA systems exist in research on wireless transmitter recognition which modeling the part between basebands of transmitter and receiver as an ARMA system. The same series of wireless transmitters constituted with components of same nominal value correspond to ARMA system functions with same structure and subtle differences in zeros and poles. The relationships between differences in poles and zeros and differences in coeffi- cients of molecular and denominator polynomial are researched in this paper and a novel method of construct feature vector with the second coefficients of molecular and denominator polynomial is proposed which increases distances among ARMA systems with subtle differences. A simulation example is presented and this paper has reference value to later research on transmitter recognition and related communication channel recognition.