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Method and system for decoding low-density parity check code

A low-density parity, parity-check matrix technology, applied in the field of coded systems

Inactive Publication Date: 2006-10-25
DTVG LICENSING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the computational load during the decoding process, especially the operation of the check node, will also cause problems

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  • Method and system for decoding low-density parity check code
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  • Method and system for decoding low-density parity check code

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Embodiment Construction

[0029] A system, method, and software for efficiently decoding structured low-density parity-check (LDPC) codes are described herein. In the following description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the invention may be practiced without these exhaustive details or with an equivalent. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the present invention.

[0030] figure 1 A schematic diagram of a communication system according to an embodiment of the present invention is shown, which is configured to use a Low Density Parity Check (LDPC) code. A digital communication system 100 includes a transmitter 101 that generates signal waveforms and transmits them over a communication channel 103 to a receiver 105 . In such a discrete communication sys...

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Abstract

The present invention provides a method of transmitting information using a Low Density Parity Check (LDPC) code. The input information is encoded according to a structured parity check matrix that imposes constraints on a sub-matrix of the parity check matrix to generate an LDPC code. The LDPC codes are transmitted through a wireless communication system (100) (eg, a satellite network), wherein a receiver (300) communicating on the wireless communication system (100) is configured to receive reception according to a signal constellation associated with the LDPC codes The LDPC code is iteratively decoded. The receiver (300) is arranged to repeatedly regenerate the signal constellation bit metrics after one or more decoding iterations.

Description

technical field [0001] This invention relates to communication systems, and more particularly to coded systems. Background technique [0002] Communication systems utilize coding to ensure reliable communication over noisy communication channels. These communication channels provide a fixed communication capacity that can be expressed in terms of bits per symbol at a fixed signal-to-noise ratio (SNR), which defines a theoretical upper limit (commonly known as the Shannon limit). As a result, various encoding schemes aim to achieve rates close to the Shannon limit. One class of codes that is close to the Shannon limit is the Low Density Parity Check (LDPC) codes. [0003] Because LDPC codes have many disadvantages, they have not been widely used before. One disadvantage is that LDPC encoding techniques are very complex. LDPC encoding using generator matrix needs to store a huge non-sparse matrix. In addition, LDPC codes need to keep large matrix blocks at all times; ther...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/15H04L27/00H03M13/03H03M13/11H03M13/19H03M13/25H03M13/29H03M13/31H04L1/00H04L27/20H04L27/34H04L27/36
CPCH03M13/1102H03M13/1111H03M13/112H03M13/118H03M13/152H03M13/19H03M13/25H03M13/255H03M13/293H03M13/31H03M13/356H03M13/6325H03M13/6583H04L1/005H04L1/0057H04L1/006H04L1/0061H04L1/0065H04L1/0071H04L27/20H04L27/34H04L27/36H04L1/00
Inventor 埃罗茨·穆斯塔法孙凤文李琳南
Owner DTVG LICENSING INC