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Encoding method based on multi-rate protograph low density parity check code and encoder

A technology of LDPC code and coding method, which is applied in the field of coding method and encoder based on multi-rate protograph LDPC code, and can solve the problems of high coding complexity and difficult hardware realization.

Inactive Publication Date: 2014-04-09
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0004] As we all know, since the parity check matrix is ​​sparse, the information transfer decoder of LDPC code is relatively easy to implement, but the generation matrix of LDPC code is not sparse, resulting in a rather high encoding complexity, which is difficult to implement in hardware

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  • Encoding method based on multi-rate protograph low density parity check code and encoder
  • Encoding method based on multi-rate protograph low density parity check code and encoder
  • Encoding method based on multi-rate protograph low density parity check code and encoder

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[0059] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] The present invention aims at the problem of high coding complexity existing in the existing protograph LDPC codes, and proposes a fast-encoding multi-code-rate protograph LDPC code design method with good performance, which does not need to generate a matrix during encoding, and directly Encoding by parity check matrix, the fast encoding algorithm can greatly reduce the amount of calculation, thereby simplifying the implementation of the encoding system and reducing the encoding complexity. Experiments also show that the protograph LDPC code proposed by the present invention has good bit error rate performance. Low coding complexity and good bit error rate performance make the protograph LDPC code proposed by the present i...

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Abstract

The invention discloses an encoding method based on a multi-rate protograph low density parity check code and an encoder. The method comprises the following steps of obtaining an information code vector s=[S1, S2,etc., Sn-3], wherein the size of si (i is no less than 1 and no more than n-3) is 1*N; determining a check matrix H(n-3) / n, wherein n is no less than 5; and obtaining a check code vector p=[P1, P2, P3] by encoding the information code vector based on the check matrix. Based on the invention, the encoding calculation amount can be dramatically reduced, the realization of an encoding system is simplified, and the encoding complexity is lowered.

Description

technical field [0001] The invention relates to the technical field of channel coding, in particular to an encoding method and an encoder based on a multi-code rate original model graph LDPC code. Background technique [0002] Gallager proposed low-density parity-check codes (LDPC codes for short) in 1962, but they did not receive much attention from the coding community. Until 1996, low-density parity-check codes were rediscovered and began to be extensively studied. In recent years, many research results of LDPC codes have shown that LDPC codes are a class of good codes with excellent performance. Digital video broadcasting standards DVB-S2, GB20600 and broadband wireless access standard IEEE802.16e have adopted LDPC codes as standard channel coding. [0003] The LDPC code is a linear block code, and its corresponding parity check matrix H is a sparse matrix composed almost of 0s. Each column of the H matrix corresponds to a bit in the codeword, and each row corresponds t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/11
Inventor 肖扬王铠尧
Owner BEIJING JIAOTONG UNIV
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