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BCH+RS-based cascade error correction coding method and system

A BCH encoder and error correction coding technology, applied in the field of communication data error correction, can solve the problems of insufficient error correction coding ability, high retransmission failure, ineffectiveness, etc., to improve the ability to resist burst errors, The effect of reducing the bit error rate of the data signal and enhancing the error correction ability

Inactive Publication Date: 2015-11-04
CHINA ELECTRONICS TECH GRP NO 7 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For ARQ, under the condition of high bit error narrowband wireless channel, if the error correction coding capability adopted is insufficient, the probability of retransmission failure is also high
Multiple retransmissions will also bring problems such as increased transmission delay and low channel utilization rate, which often fail to achieve good results, let alone be applicable to real-time services such as packet voice

Method used

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  • BCH+RS-based cascade error correction coding method and system
  • BCH+RS-based cascade error correction coding method and system
  • BCH+RS-based cascade error correction coding method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, a method based on BCH+RS cascaded error correction coding includes the following steps:

[0039] S1: Divide the L data to be sent into r columns at the data sending end of the channel, and the data length of each column is m, then L=m×r;

[0040] S2: Assuming that the codeword length of the RS code is n, the maximum error correction capability of the RS code is t, and performing RS (n, m, t) encoding on each column of data in the r column data;

[0041] S3: Perform BCH(n 0 , m 0 , t 0 ) coding, the data sending end will send the coded data to the data receiving end sequentially in the channel, where n 0 is the data length, m 0 Information bit length, t 0 Maximum error correction capability;

[0042] S4: Perform BCH (n0, m0, t0) decoding on each column of data received at the data receiving end of the channel. When the decoding is successful, the correct information will be restored. When the decoding fails, the position of the error cod...

Embodiment 2

[0049] Such as figure 2 As shown, a cascaded error correction coding system based on BCH+RS includes a data sending end and a data receiving end located at both ends of the channel; the data sending end includes a sequentially connected RS encoder and a BCH encoder, and the data receiving end includes a sequential Connect the BCH decoder and RS decoder for the second time; the BCH encoder at the data sending end is connected to the BCH decoder at the data receiving end; the data is completed through the RS encoder, BCH encoder, BCH decoder and RS decoder in sequence error correction process.

[0050] The same or similar reference numerals correspond to the same or similar components;

[0051] The positional relationship described in the drawings is only for illustrative purposes and cannot be construed as a limitation to this patent;

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PUM

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Abstract

The invention provides a BCH+RS-based cascade error correction coding method and a BCH+RS-based cascade error correction coding system. The BCH+RS-based cascade error correction coding method is an enhanced error correction coding method for grouped data communication of a high error-code narrow-band wireless channel, and comprises the steps of performing RS coding and then BCH coding on data to be transmitted at a transmitting end, cascading the two coding methods to enhance error correction capability of error correction coding of the data transmitting end, and performing error correction coding such as BCH decoding, RS decoding as well as RS deletion and decoding at a receiving end to reduce error rate of data signals. By adopting the method of interleaving BCH coding and RS deletion and decoding, the BCH+RS-based cascade error correction coding method and system can further improve burst error-code resistance, and the effect of error correction is greatly improved.

Description

technical field [0001] The present invention relates to the field of communication data error correction, and more specifically, relates to a BCH+RS cascaded error correction coding method and system. Background technique [0002] In the digital communication system, when the digital signal is transmitted on the actual channel, due to the unsatisfactory channel transmission characteristics and the interference of additive noise, the received digital signal will inevitably have errors. Channel error-correcting codes are a coding and decoding method designed to improve transmission quality and ensure reliability of information transmission. Its basic method is to add some check bits to the transmitted information sequence at the sending end, and these redundant check bits and information bits are related to each other through certain rules. The receiving end checks the relationship between the information bit and the check bit according to the established rules. Once an error...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/15
Inventor 党百振梁政王炜发王肃
Owner CHINA ELECTRONICS TECH GRP NO 7 RES INST
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