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Interpretation method and decoder

A decoder and a decoding technology, which are applied in the field of decoding methods and decoders, can solve the problems of incorrect initialization information, reduce inter-symbol crosstalk channels, and low transmission performance of inter-symbol crosstalk channels, and achieve reliable initialization information and reduce Bit error rate, the effect of improving transmission performance

Inactive Publication Date: 2009-01-14
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0038] Since the estimated value of the information obtained by the maximum likelihood ratio sequence estimation may still contain errors, excessive trust in the results of the maximum likelihood ratio sequence estimation will cause errors in the initialization information during LDPC error-correcting decoding, resulting in error-correcting decoding. error, the purpose of effectively reducing the bit error rate of the intersymbol interference channel system is not achieved, so that the transmission performance of the intersymbol interference channel is not high

Method used

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  • Interpretation method and decoder
  • Interpretation method and decoder
  • Interpretation method and decoder

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Embodiment Construction

[0061] Embodiments of the present invention will be described below with reference to the accompanying drawings. In the referenced drawings, the same reference numerals are used for the same or similar components in different drawings.

[0062] see image 3 , is a structural schematic diagram of a specific embodiment of a decoder in the present invention. The decoder includes:

[0063] The sequence estimation module 20 performs maximum likelihood ratio sequence estimation on the received sequence to obtain an estimated sequence;

[0064] A credibility calculation module 22, coupled to the sequence estimation module 20, for calculating the credibility of each bit in the estimated sequence;

[0065] The initialization module 24 is coupled with the sequence estimation module 20 and the reliability calculation module 22, and initializes the LDPC decoding information according to the reliability of each bit and the received sequence;

[0066] The decoding module 26 is coupled t...

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Abstract

The invention discloses a coding method comprising executing maximum likelihood ratio sequential estimation, obtaining estimated sequence, computing reliability of each bit of the sequence; initializing LDPC coding information according to reliability of each bit and received sequence; after completing initialization, using information generated by initialization as initial value of LDPC coding, executing LDPC iteration coding, obtaining coding result. The invention also discloses a coder. The inventive coder and coding method can effectively reduce communication system error rate of combining error correcting and coding for MLSE and LDPC code.

Description

technical field [0001] The present invention relates to the communication field, in particular to a decoding method and a decoder. Background technique [0002] In a communication system, a channel is used to transfer information from one place to another. However, for communication channels with intersymbol interference, mutual interference between different signals may cause errors in information transmission. In order to improve the transmission performance of a communication system under an intersymbol interference channel, a Maximum Likelihood Sequence Estimation (Maximum Likelihood Sequence Estimation, MLSE) technique and an error correction code technique are often used. There are many methods of error correction codes, among which a low density parity check (Low Density Parity Check, LDPC) code is a kind of error correction code. [0003] The MLSE technology, the LDPC code decoding technology and the basic joint decoding technology of the two are described separate...

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Application Information

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IPC IPC(8): H04L1/00H04L1/24
Inventor 许渤陶智慧
Owner HUAWEI TECH CO LTD
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