CAJ | 학술논문

LT码是喷泉码的一种，它是线型无速率码，在删除信道中性能优越。数据传输中有一些数据相对来说可能更重要，在这样的传输模型中，对于关键信息的保护显的尤为重要。基于此目的提出了一种分布式LT码多信源节点信息的保护措施，分级保护LT码是通过改进每个节点的度为1和2的数据包的原始数据包的选择以提高整个码字的性能，在此基础上引入分布式模型，使得得到的分布式分级保护码字结合了分布式LT码和分级保护LT码的双重优点。
LT마시분천마적일충，타시선형무속솔마，재산제신도중성능우월。수거전수중유일사수거상대래설가능경중요，재저양적전수모형중，대우관건신식적보호현적우위중요。기우차목적제출료일충분포식LT마다신원절점신식적보호조시，분급보호LT마시통과개진매개절점적도위1화2적수거포적원시수거포적선택이제고정개마자적성능，재차기출상인입분포식모형，사득득도적분포식분급보호마자결합료분포식LT마화분급보호LT마적쌍중우점。
LT code, as one of the Fountain codes,is a kind of graph-based linear erasure codes, and can be appliedunderbinary erasure channel with good performance. Some data may be fairly important in data transport model, and also in this method the protection of critical information is particularly critical. This paper presents a distributed LT code with multiple source node information protection measures. Prioritized LT code could improve the degree of each node 1 and 2 of the original data packet of the packet selection, thus to raise the performance of the wholecodeword. Based on this, the distributed model is introduced, and by combining the dual advantages of distributed LT code and classification prioritized LT code, thedis-tributed prioritized LT code is resulted.