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A Method of Broadcasting Highly Coded Signature Values ​​Based on Systematic Online Fountain Codes

A technology of encoding symbols and fountain codes, which is applied in transmission systems, broadcast service distribution, digital transmission systems, etc., and can solve problems such as decoding performance degradation

Active Publication Date: 2020-12-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the different decoding states of the online fountain code application in the broadcasting scene affect each other and lead to the degradation of the decoding performance. While improving reliability, the transmission efficiency is improved

Method used

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  • A Method of Broadcasting Highly Coded Signature Values ​​Based on Systematic Online Fountain Codes
  • A Method of Broadcasting Highly Coded Signature Values ​​Based on Systematic Online Fountain Codes
  • A Method of Broadcasting Highly Coded Signature Values ​​Based on Systematic Online Fountain Codes

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Embodiment 1

[0065] figure 1 It is a schematic diagram of a method for broadcasting high-coded symbol values ​​based on system online fountain codes in the present invention; it can be seen from the figure that the system on which a method of broadcasting high-coded symbol values ​​based on system online fountain codes relies includes a sending end And multiple receiving ends, where the sending end includes a source and an encoder, and the receiving end includes a decoder and a sink.

[0066] figure 2 It is a method of broadcasting high coding symbolic value based on system online fountain code and the flow chart in Embodiment 1 of the present invention.

[0067] This embodiment specifically elaborates the specific situation of each step in the implementation process of the present invention, mainly based on steps 1 to 9 in the main body of the specification;

[0068] Wherein, the number of source symbols to be coded is k=1000, and its serial numbers are 1, 2, 3,..., 1000 respectively; ...

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Abstract

The invention relates to a high-coding symbol value broadcasting method based on system online fountain codes, and belongs to the technical field of channel coding, fountain codes and wireless broadcasting. The method comprises the following steps: 1) performing initialization; 2) generating and sending a first type of coding symbols; 3) receiving and processing the first type of coding symbols; 4) repeating the steps 2) and 3) until the sending number of the first type of coding symbols reaches a set parameter; 5) enabling a decoder to count the recovery proportion and generate feedback; 6) generating and sending a second type of coding symbols; 7) receiving and processing the second type of coding symbols; 8) processing the coded symbol with the degree value of 1; 9) processing the codedsymbol with the degree value of 2; 10), repeating steps 5) -9) till decoders at all receiving ends finish coding. under the condition that broadcast channel receiving ends are heterogeneous and are not provided with the decoders, the number of feedback retransmission times during fountain code decoding is effectively reduced, the decoding expenditure of users with good channel states and poor channel states is reduced, and the system throughput is improved.

Description

technical field [0001] The invention relates to a wireless broadcasting method, in particular to a broadcasting method of high coding symbol degree value based on a system online fountain code, and belongs to the technical fields of channel coding, fountain codes and wireless broadcasting. Background technique [0002] Wireless broadcasting can pass information from one sender to multiple receivers, and it is widely used in many scenarios, such as digital video broadcasting and cellular data broadcasting. At the same time, wireless broadcasting also faces some unique challenges, for example, receivers are usually heterogeneous, with different computing power and channel quality, and the device with the worst channel quality has the greatest impact on the broadcasting protocol. [0003] Fountain codes, as a class of error-correcting codes suitable for broadcasting services, provide a solution to the above challenges. Fountain codes can generate an infinite number of encoded ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W28/06H04L1/00
CPCH04L1/0056H04W4/06H04W28/06
Inventor 费泽松黄靖轩李欢
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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