Method for selecting LDPC base code in multi-lpdc code, and device therefor

A basic code, the selected technology, applied in the field of basic code selection, can solve problems such as bit error rate reduction

Pending Publication Date: 2019-06-14
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the bit error level refers to the point where the bit error rate decreases slightly although the information volume increases

Method used

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  • Method for selecting LDPC base code in multi-lpdc code, and device therefor
  • Method for selecting LDPC base code in multi-lpdc code, and device therefor
  • Method for selecting LDPC base code in multi-lpdc code, and device therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0136] The first basic code proposed by the present invention can be used for large CB and high throughput, and the second basic code can be used for small CB and low delay. Table 1 shown below presents several parameters for the first basic code and the second basic code. However, the features of the invention are not limited to the parameters presented in this table.

[0137] [Table 1]

[0138]

[0139] In the above table, M b denotes the size of parity of each basic code, and Nb denotes the size of codeword of each basic code. In addition, Pb represents the punching size of each basic code. Kb,max represents the maximum value of the column number of each basic code, and Kb,min represents the minimum value of the column number of each basic code.

[0140] A boost value can be determined taking into account the maximum message shortening. In this case, the maximum amount of shortening can be determined as (Kb,max-Kb,min)*Z. If there are a large number of promoted val...

Embodiment 1-2

[0150] When the CB sizes input to the LDPC code overlap, the first basic code and the second basic code according to another embodiment of the present invention may be proposed.

[0151] Table 4 and Table 5 show several parameters of the first basic code and the second basic code according to another embodiment of the present invention.

[0152] [Table 4]

[0153]

[0154] Table 6 and Table 7 respectively show several lifting values ​​of the first basic code and the second basic code according to another embodiment of the present invention.

[0155] [table 5]

[0156]

[0157] [Table 6]

[0158]

[0159] When comparing Table 5 with Table 6, it can be understood that when the CB size is 504 to 2560, the first basic code and the second basic code are applied. In the following, when the basic codes that can be selected according to the CB size overlap (when the CB sizes that can be supported by each basic code overlap), a method for selecting the basic code of the LDP...

Embodiment 1-3

[0171] In the following, another embodiment for selecting a plurality of boost values ​​or boost sets will be described. Multiple boost values ​​that can be used in the base code can be chosen in the form of A*2^B.

[0172] Table 7 shows various boosting values ​​that can be used by the basic code of the LDPC code according to another embodiment of the present invention.

[0173] [Table 7]

[0174]

[0175] Table 8 shows several parameters of the first basic code and the second basic code according to another embodiment of the present invention.

[0176] [Table 8]

[0177]

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Abstract

A method for encoding a quasi-cyclic low-density parity-check (LDPC) code which supports a multi-base code according to an embodiment of the present invention includes: a step for selecting a base code for generating a parity-check matrix from among a first base code and a second base code; a step for selecting a lifting value for generating the parity-check matrix from among a plurality of lifting values; and a step for generating the parity-check matrix using the selected base code and lifting value, wherein the base code can be determined on the basis of the code block size and a code rate,and the lifting value can be determined on the basis of a parameter of the base code and the code block size.

Description

technical field [0001] The present invention relates to a wireless local area network (LAN) system, and more particularly, to a method of selecting an elementary code in a system supporting a plurality of Low Density Parity Check (LDPC) codes and an apparatus supporting the method. Background technique [0002] Wireless access systems have been widely deployed to provide various communication services, such as voice communication services and data communication services. In general, a wireless access system is a multiple-access system capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.). For example, multiple-access systems may include Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-F...

Claims

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Application Information

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IPC IPC(8): H03M13/11H03M13/37H03M13/00
CPCH03M13/116H03M13/1185H03M13/1188H03M13/618H04L1/0043H04L1/0057H03M13/1151H03M13/3707H03M13/6508H03M13/1148H03M13/616
Inventor 辛钟雄金奉会金镇佑鲁广锡边日茂
Owner LG ELECTRONICS INC
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