Study On Anti-Jamming And Performance Evaluation Index System Of Satellite Communication

The broadcasting of satellite communication as well as the exposed positions of satellite inevitably leads to jamming. Therefore, it is meaningful to develop the anti-jamming technique and evaluate the performance of the anti-jamming technique for the satellite communication system. In this thesis, the common and novel anti-jamming techniques are studied and a jamming evaluation index system is further established. It should be noted that the researches are based on several kinds of jamming that the satellite communication will confront with. And the main contributions of this thesis are summarized as follows.First of all, the multi-beam antenna anti-jamming technique and frequency hopping anti-jamming technique are mainly studied, based on analyzing the categories and corresponding characteristics of the jamming that the satellite communication may confront with. The principle of the multi-beam antenna anti-jamming technique is analyzed firstly. Through simulations, it is shown that the anti-jamming performance of multi-beam antenna always outperforms that of the traditional antenna no matter with or without beam swathing. Then the basic principle of the frequency hopping anti-jamming technique is analyzed and it is also shown by simulations that the frequency hopping system can cope with different kinds of common jamming. What's more, the anti-jamming performances evaluation system is established for Ka-band satellite frequency hopping communication. The system has the ability to evaluate the anti-jamming performances of the Ka-band satellite frequency hopping communication under different kinds of jamming.Secondly, the categories, corresponding characteristics and the yielding process of smarting jamming for satellite communication are analyzed. During smart jamming the satellite communication, detectives beforehand is a key step for effectively carrying out the jamming. In order to cope with the smart jamming on the whole, this paper introduces the physical layer security techniques into the combat of detectives innovatively. Moreover, the multi-beam beam forming scheme and the artificial noise aided scheme are studied in detail among the physical layer security techniques. The simulation results show that the physical layer security techniques can cope with the smart jamming effectively.Finally, the procedure of establishing an anti-jamming evaluation index system of satellite communication is analyzed and the structure of the index system is studied. Then an anti-jamming evaluation index system for satellite communication is established by selecting the indices which can directly reflect different anti-jamming techniques, based on the basic and extended characteristics. This index system has the advantages of all-sided, high quantized and extended.