Construction and coding method for multi-code rate and multi-code length LDPC (Low Density Parity Check) codes

A technology of LDPC codes and coding methods, applied in the field of construction and coding of multi-code-rate multi-code-length LDPC codes, to achieve the effects of guaranteed performance, simplified design and implementation

Active Publication Date: 2018-05-11
TSINGHUA UNIV
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Problems solved by technology

For example, for regular LDPC codes, the row weights of the check matrix are all the same, and the column weights are all the same. The a...

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  • Construction and coding method for multi-code rate and multi-code length LDPC (Low Density Parity Check) codes
  • Construction and coding method for multi-code rate and multi-code length LDPC (Low Density Parity Check) codes
  • Construction and coding method for multi-code rate and multi-code length LDPC (Low Density Parity Check) codes

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Embodiment Construction

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention provides a construction and coding method for multi-code rate and multi-code length LDPC (Low Density Parity Check) codes. The method comprises the steps of constructing a template matrix; constructing check matrixes according to the template matrix; receiving an information bit length, a coding bit length and input information bits; selecting a target template matrix, acquiring a coding check matrix according to the target template matrix, acquiring a shortened check matrix according to the coding check matrix, acquiring an intercepted check matrix according to the shortened check matrix, and carrying out zero filling on the input information bits to acquire filled information bits; carrying out LDPC coding on the filled information bits to acquire coding bits; removing zerofilled bits and partial check bits in the coding bits, and deleting partial information bits contained in the coding bits to acquire output coding bits. According to the method, the multi-code rate and multi-code length QC-LDPC (Quasi-Cyclic LDPC) codes of which information bit and check bit lengths are changed bit by bit can be constructed, moreover, the performance of the QC-LDPC codes is guaranteed, and the design and realization of a coding modulation system based on the LDPC codes are simplified.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a construction and encoding method of a multi-code-rate and multi-code-length LDPC code. Background technique [0002] In the field of information transmission, under given channel conditions (such as signal-to-noise ratio, Signal-to-Noise Ratio, SNR), the maximum transmission rate of noise and interference channels is limited by the Shannon channel capacity, and the effectiveness and reliability of information transmission require High-performance channel coding approaching the theoretical bounds of channel capacity. On the other hand, the diversity of user needs, channel conditions, and coding and modulation schemes in actual information transmission requires channel coding with multiple code rates and multiple code lengths. extreme demand. To sum up, efficient and reliable information transmission in practical systems requires the design of channel c...

Claims

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Application Information

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IPC IPC(8): H04L1/00H03M13/11H03M13/25
CPCH03M13/1102H03M13/255H04L1/0057H04L1/0061
Inventor 彭克武陈璋美刘玥
Owner TSINGHUA UNIV
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