A serial transmission method of LDPC code based on on-line fountain code

Abstract

The invention relates to an LDPC code serial transmission method based on an on-line fountain code, belonging to the technical field of error control and channel coding. The method comprises the following steps: LDPC coding the source symbols; and then initializing the on-line fountain code encoder and decoder; an on-line fountain code encoder generates a first kind of on-line fountain code encoding packet and sends the encoded packet to a receiving end via a channel. An on-line fountain code decoder receives and processes the first kind of on-line fountain code coding symbols. After the feedback of the decoding of the first kind of on-line fountain code, the second kind of on-line fountain code coding symbol is generated and sent to the receiving end for processing, and the feedback afterthe decoding is finished; a third type of on-line fountain code encoding symbol is generated and sent to the receiving end for processing, and the decoded LDPC code encoding symbol is decoded by LDPC. The method has the characteristics of adaptive rate change and reduces the system overhead. Reducing the number of encoded symbols required for transmission and improving the throughput of the system; at the same time, the transmission delay and the decode error probability are reduced.

Description

technical field [0001] The invention relates to an LDPC code transmission mechanism, in particular to an LDPC code serial transmission method based on an online fountain code, and belongs to the technical field of error control and channel coding. Background technique [0002] With the development of communication technology, the traffic volume of mobile communication is increasing rapidly, and people's requirements for communication performance are also constantly increasing. A good coding and modulation scheme can provide greater data throughput, higher transmission quality and lower transmission delay for wireless links. [0003] The fifth generation of mobile communication (The 5th Generation, 5G) pursues the ultimate communication quality between people, and requires support for a user experience rate of 0.1-1 Gbps, a peak rate of tens of Gbps, and an end-to-end delay of milliseconds. With its excellent codeword error correction performance under medium and long code l...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problem that the length of the retransmitted data packet of the traditional HARQ transmission mechanism of the LDPC code is equal to that of the first transmitted data packet, which reduces the communication efficiency and increases the transmission delay, and proposes a serial transmission method of the LDPC code based on the online fountain code. Perform online fountain code encoding on the coded symbols output by the LDPC code encoder. When decoding, first perform online fountain code decoding, and then decode the LDPC code

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