Individual Character Analysis Of Communication Transmitter

Individual communication transmitter identification is an important issue in the field of communication reconnaissance in recent years. With the characteristics reflected on signal by the difference of the transmitter hardware, this issue focuses on seeking the source of the received signal. So the transmitter tracking can be realized and a significant thread can be provided for the determination of communication network construction. The study of this subject is different from the study of the traditional communication reconnaissance. Analyzing and intercepting the transmitted information are important subjects of the traditional communication reconnaissance but they are not the focuses of the individual transmitter identification, and the individual characteristics from the difference of the hardware will be removed or diminished as noise when studying the traditional communication reconnaissance but will be the emphasis when studying transmitter individual identification.The individual transmitter character analysis is vital for communication transmitter identification. Aiming at the different transmitters of the same type and working mode, the individual transmitter character analysis is taken in this dissertation. With the basic theory and the mechanism, researching work is taken on the individual character analyzing method of different working mode, the stable working characters including the noise character, the spur character and the frequency character, and the transient character analysis of unstable working mode. A solution is proposed aiming at transmitter identification of different working mode under different working mode. A series of theoretically and practically valuable algorithms are proposed, and the good performances of them are verified by simulation experiments with real data. The main contributions of this dissertation are concluded as follows:1. The analysis methods of the individual transmitter character under stable conditions and unstable conditions are studied systematically, and then the basic frame of individual transmitter identification is established. The definition of the individual transmitter character is given clearly, i.e. only the universal, unique, stable and...