| On board anti-jamming processing is an important research direction, and it is a challenging problem to jam the data links of communication satellites with on board processing. On the other hand, with the rapid development of time-frequency distribution and wavelet theory, the non-stationary characteristics of signals is believed to play an important role in communication counterwork. This thesis aims to explore the most efficient jamming patterns to communication data links of on board processing satellites.After analysis of FH satellite communication, an on board anti-jamming experimental communication satellite system and its anti-jam measures, this thesis mainly analyzes and simulates the anti-jamming ability to FH satellite communication and the jamming ability of time-frequency distribution based interference mode to the experimental communication satellite system. The author’s main work and contributions are as follows:1. A thorough theoretical analysis of the structure and principle of FH satellite communication links was made. The signal form and the impact of various jam interferences is analyzed in detail. By taking MATLAB as the platform, an FH satellite communication was built and simulations of jamming this system with various interference as well as the analysis were undertaken.2. An anti-jamming experimental satellite communication system based FDMA-CWTDM was introduced. The fundamental and its anti-jamming measures of this system were analyzed, and thereby the jamming experiment platform was setup.3. A high efficient Time-frequency distribution based jamming pattern was introduced. Performance comparisons between the new jamming pattern and other patterns to the experimental satellite system were made by simulations, and performance analysis was given.4. Cooperating with others, the experimentation based on system hardware was fulfilled to verify the performance of jamming patterns. |
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