| It is well known that information technology is the most important part in the modern warfare, so how to get the power to control information has already become the primary resource to decide the winner of war. In the complicated information war field,the communication system has became the most weak and easy-attacking part. With the development of information war, not only the anti-jamming in point-to-point communication system is needed, but the communication network anti-jamming is one of the necessary approaches. So the research on integrated anti-jamming will play a great role in application of modern military communication.Chapter one of this thesis introduces the research significance and background of integrated anti-jamming at first, then puts forward some problems of integrated anti-jamming communication that should be studied and solved.In chapter two, the characteristics of jamming signal, the jamming standard, the measure of jamming power and the evaluation of jamming effect are discussed.In chapter three, the theory of particular anti-jamming technologies are analyzed, especially the spread spectrum (SS) is one of the most important anti-jamming technologies, including direct sequence spread spectrum (DSSS), frequency hopping spread spectrum (FHSS) and other improved technologies. Some novel technologies are also proposed, such as two dimensional spread spectrum (2D-SS), self-encoded spread spectrum (SESS), multiple input multiple output (MIMO), orthogonal frequency division multiplexing (OFDM) and so on.In chapter four, the importance of anti-jamming performance of communication system evaluation is explained firstly. Next three fuzzy cluster algorithms such as fuzzy equivalent matrix (FEM) and fuzzy-c means (FCM) methods are proposed for evaluation of anti-jamming communication system. On the bases of fuzzy cluster, the fuzzy pattern recognition application is introduced in communication system. The evaluation of simple DSSS is simulated lastly. |
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