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卫星通信相关的费用包括固定投资和运行费用,从卫星通信经济学的角度出发,优化卫星通信可以节省成本。首先介绍了VSAT卫星通信网的网络拓扑及组网方式;其次从卫星通信的调制及编码技术两个方面分别对卫星通信进行优化,重点对格状编码调制、LDPC码、Turbo码与级联码编码技术、载波迭加技术进行了研究,并分别指出了各自的优点;最后对优化卫星通信技术的应用前景进行讨论。
Satellite communications related costs include fixed investment and operating costs, from satellite communications economics point of view, optimizing satellite communications can save costs. Firstly, the network topology and networking modes of the VSAT satellite communication network are introduced. Secondly, the satellite communication is optimized respectively from the aspects of modulation and coding technology of satellite communication. The emphasis is put on the modulation and coding of lattice codes, LDPC codes, Turbo codes and concatenated codes Coding technology and carrier superposition technology are studied, and their respective advantages are pointed out respectively. Finally, the application prospects of the optimized satellite communication technology are discussed.