Abstract
AbstractInformation theory, channel coding and cooperative communicate`on are the three theoretical pillars of modern digital communication systems. Information theory is based on revealing the essential characteristics and laws of information, and its basic task is to provide a theoretical basis for the design of effective and reliable communication systems. Channel coding is developed and gradually matured under the guidance of Shannon's information theory. It provides an effective means for reliable transmission of information in the channel. Among them, the LDPC code has become one of the most popular research directions in the current channel coding field due to its excellent performance close to the Shannon limit and huge potential application value. This article first quickly popularizes the concept of digital communication systems, analyzes the LDPC code technology and cooperative MIMO technology in detail, then conducts an in-depth study on the capacity of the relay channel, and finally combines the LDPC code with the cooperative communication, and proposes the LDPC coded cooperative communication Program. Finally, the LDPC code is applied to satellite communication, and the performance of the satellite communication system is improved through different methods. KeywordsTrunk channel capacityLDPC codeCoding cooperative communicationSatellite communications
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