Mixed error-correcting method based on bidirectional odd-even check

An error correction method and parity check technology, applied in the fields of digital communication and information coding, can solve problems such as reducing the efficiency of data transmission

Inactive Publication Date: 2008-12-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the bit error rate of the channel is relatively high, the number of retransmissions w

Method used

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  • Mixed error-correcting method based on bidirectional odd-even check
  • Mixed error-correcting method based on bidirectional odd-even check
  • Mixed error-correcting method based on bidirectional odd-even check

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0035] Example 1

[0036] like figure 1 As shown in the figure, the entire specific implementation is composed of a unit 101 for generating a data segment according to the original data, a unit 102 for calculating the original check information of the data segment, a unit 103 for generating a transmission data block, a unit 104 for sending a transmission data block, and a unit for receiving a transmission data block. 105. Extract the data segment block and the original check information unit 106, calculate the current parity information unit 107 according to the data segment block, determine whether bidirectional parity error correction can be made 108, the bidirectional parity error correction unit 109, and the data segment block after error correction It consists of twelve parts, such as the recombination unit 110, the composite error correction unit 111, the composite error correction determination unit 112, and the retransmission data division block 113 unit.

[0037] The...

Example Embodiment

[0067] Embodiment 2

[0068] According to FIG. 4, an example of processing specific data by the algorithm disclosed in the present invention, which corresponds to the appendix figure 1 The process is as follows:

[0069] Unit 401 is raw data, which is a (B i , L i )=(17,8) size data block, to transmit it, first generate a data partition block based on it, assuming that the size of each data partition block is selected as (B i , L i )=(8, 8), then the original data will generate 3 data partitions, two of which are of size (B 1 , L 1 )=(B 2 , L 2 )=(8, 8), that is, unit 402 and unit 403, and the size of a data partition block is (B 3 , L 3 )=(8, 1), ie unit 404. Next, a corresponding transmission data block is generated for each data division block, as shown in unit 405, unit 406 and unit 407, and then sent and received. Since there is interference in the channel, the received transmission data block is the same as the transmitted transmission data block. difference. ...

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PUM

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Abstract

The invention discloses a hybrid error correction method based on the parity check, particularly to the method for performing the checking error correction under the strong disturb present in the channel. The invention comprises: according to the original data generation dividing block, the generation of the original checking information of the data dividing block, the generation of the transmission data block, transmitting the transmission of the data block and check and the error correction of the data dividing block. The transmission part relates to the retransmission, and the error correction part adopts the complex error correction method. The invention is characterized in that, the complex error correction is processed using the retransmitted data dividing block. The method disclosed in the invention markedly improves the digital communication and the error correction rate of the signal detection, advances the correction rate of the communication under the strong disturb in the channel.

Description

technical field [0001] The invention relates to the fields of digital communication, information coding and the like, especially a method for checking and correcting data under conditions such as strong interference in the channel. Background technique [0002] Just as the signal-to-noise ratio is the most critical quality indicator in analog communication, the most critical quality indicator in digital communication is the bit error rate, which refers to the ratio of the number of error codes to the total number of transmission codes. Since the channel cannot be completely ideal, there must be a certain bit error rate. Therefore, for the information receiving end, it is necessary to check the received data to determine whether there is an error. This requires the information sending end to send data. It is necessary to send a check code or an error correction code corresponding to the data, and there are many different algorithms depending on the generation mechanism of the...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/24
Inventor 董利达郑寒程曦浩
Owner ZHEJIANG UNIV
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