Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus and method for mapping and demapping signals in a communication system using a low density parity check code

A low-density parity and mapping method technology, which is applied to the application of error detection coding of multiple parity bits, error correction/detection using block codes, transmission systems, etc., can solve problems such as link performance degradation

Active Publication Date: 2013-12-18
SAMSUNG ELECTRONICS CO LTD
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In communication systems, link performance can be greatly degraded by channel noise, fading, and intersymbol interference (ISI)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus and method for mapping and demapping signals in a communication system using a low density parity check code
  • Apparatus and method for mapping and demapping signals in a communication system using a low density parity check code
  • Apparatus and method for mapping and demapping signals in a communication system using a low density parity check code

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, specific details such as detailed configuration and components are merely provided to help the general understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions will be omitted for clarity and conciseness.

[0038] According to one embodiment of the present invention, an apparatus and method for mapping and demapping signals in a system using LDPC codes are provided.

[0039] According to another embodiment of the present invention, an apparatus and method for mapping and demapping between LDPC codewords and QAM symbols are provided.

[0040] The f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An apparatus and method for mapping and demapping signals in a system using a Low Density Parity Check (LDPC) code are provided. In the method, LDPC codeword bits are written column-wise and read row-wise, substreams are generated by demultiplexing the read bits using a demultiplexing scheme, and bits included in each of the substreams are mapped to symbols on a signal constellation, wherein the demultiplexing scheme is determined corresponding to a modulation scheme used in the signal transmitter, a length of the LDPC codeword, and a number of the substreams.

Description

technical field [0001] The present invention relates to apparatus and methods for mapping and demapping signals in systems using Low Density Parity Check (LDPC) codes. Background technique [0002] In communication systems, link performance can be greatly degraded by channel noise, fading, and intersymbol interference (ISI). Therefore, the use of LDPC codes as error correction codes is actively considered in next-generation communication systems. [0003] figure 1 A conventional LDPC encoding operation is shown. [0004] refer to figure 1 , LDPC encoder 110 will have length K ldpc information word vector Encoded as a vector of LDPC codewords The information word vector includes K ldpc bits of information. That is, the information word vector Each element of is an information bit. [0005] LDPC encoder 110 uses a N ldpc Column parity check matrix generation length N ldpc -K ldpc parity vector And use the information word vector and the parity vector to gener...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03M13/11
CPCH03M13/1102H04L1/0041H04L1/0045H04L2025/0342
Inventor 梁贤九郑鸿实尹圣烈
Owner SAMSUNG ELECTRONICS CO LTD