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Error Resisting Method Based on Cyclic Redundancy Check and Erasure Coding

A technology of cyclic redundancy and erasure correction coding, which is applied in the direction of error detection coding, data representation error detection/correction, error correction/detection using block code, etc., and can solve the problems of channel random bit error and burst error, etc. Achieve the effects of low delay, low complexity, and improved ability to resist bit errors

Active Publication Date: 2016-03-16
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems caused by random code errors and burst code errors in the aforementioned channels

Method used

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  • Error Resisting Method Based on Cyclic Redundancy Check and Erasure Coding
  • Error Resisting Method Based on Cyclic Redundancy Check and Erasure Coding
  • Error Resisting Method Based on Cyclic Redundancy Check and Erasure Coding

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Embodiment Construction

[0027] Below, combine Figure 1 to Figure 4 The present invention is further described.

[0028] The anti-error method based on cyclic redundancy check and erasure coding is characterized in that it comprises the following steps:

[0029] Encoder:

[0030] (1) At the coding end, the transmitted data encoded by the source is divided into frames;

[0031] The wireless communication system that the present invention applies is as figure 1 As shown, the algorithm involved in the invention performs erasure coding with a data frame structure, and a total of 250 bytes of data per frame are processed. The whole algorithm structure flow is as follows figure 2 shown.

[0032] (2) Add 3 frames of erasure coded frames after every 17 frames of data;

[0033] For the data after framing, the erasure coding of the present invention adopts fast Vandermonde erasure coding technology.

[0034] In order to facilitate the description of related technologies in the encoding process, let the...

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Abstract

The invention discloses an anti-error method based on cyclic redundancy check and erasure correction coding, which belongs to the technical field of wireless link digital measurement and control communication with random or burst errors. Add the fast cyclic redundancy check to the length of the code stream, and add the error correction supervision code to the cyclic redundancy check code, and then perform fast Vandermonde erasure coding on the bytes of a certain length by column, and finally send the encoded data to the The input channel is transmitted, and the decoding end decodes and restores the original data in a corresponding manner. The method can be applied to fields such as high compression ratio video code streams that are particularly sensitive to channel code errors, important data protection transmitted in wireless channels with high code error rates, and the like. The invention enables the decoding end to quickly and timely discover and correct data that generates bit errors, has the advantages of large coding gain, small delay, and low algorithm complexity, and provides a real-time processing basis for further reducing the impact of bit errors on video image quality.

Description

technical field [0001] The invention belongs to the technical field of wireless link digital communication with random bit errors or burst errors, and relates to an anti-error method based on cyclic redundancy check and erasure coding, and is especially suitable for applications with high requirements on delay and error-correction. Codes are particularly sensitive to the protection of important data transmitted over wireless links. Background technique [0002] With the rapid development of communication technology and network technology, digital communication systems are being used more and more widely. However, any communication network cannot guarantee that the transmission process is completely reliable, especially the wireless network that has been widely used in recent years. Due to the influence of channel fading, interference and multipath transmission, the bit error rate of the communication link is high, so the data communication on the wireless channel with burst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/09
Inventor 李其虎文运丰周侃马梦奇胡佳龚志勇李光
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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