Method for realizing distributed Luby transform (LT) codes on the basis of layering network topology
A layered network and distributed technology, applied in the field of distributed approximate ideal LT coding, can solve the problems of lack of research on LT codes, achieve superior performance and reduce coding workload
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[0039] Such as figure 1 As shown, the layered network topology on which the method of the present invention is based includes one source, more than one base station, more than one first layer relay node, more than one second layer relay node, and one receiving end. Among them, the greater the number of base stations and first-layer relay nodes, the closer the coding performance is to the ideal LT coding. In view of cost and other factors, an appropriate compromise can be selected according to the actual application. The degree distribution in the present invention refers to the probability distribution of selecting the number of corresponding source data packets, and at the same time, the operations of selecting packets and degrees of each node are independent of each other. In order to achieve the best performance, the data packet loss of the channels between the source and the base station, between the base station and the first layer relay node, and between the first layer r...
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