The Research of LDPC Code in Communication System

Dan Hu

doi:10.4028/www.scientific.net/AMR.532-533.1135

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 532-533The Research of LDPC Code in Communication System

The Research of LDPC Code in Communication System

Abstract:

Low-Density Parity-Check(LDPC) codes are a class of channel codes based on matrix encoding and iterative decoding. It has low decoding complexity as well as capacity approaching performance. Until now, the best designed LDPC codes can achieve the performance within only 0.0045dB of the Shannon limit. With the in-depth study, the encoding complexity of LDPC codes is not a difficult problem for application any more. Today, we can see LDPC codes widely used in many practical systems, such as wireless communication system, deep-space communication system, optical-fiber communication system and media storage system. This thesis first introduces the development of channel coding, and then the basic principles and concepts of LDPC codes. The following parts discuss several techniques of LDPC codes, including the construction methods of low-density parity matrix, the iterative decoding algorithms and performance analysis methods. Besides, we propose our opinions and our improved algorithms.

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Periodical:

Advanced Materials Research (Volumes 532-533)

Pages:

1135-1139

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.532-533.1135

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Online since:

June 2012

Authors:

Dan Hu

Keywords:

Bit-Flipping, Channel Coding, Linear Block Code, Low-Density Parity-Check (LDPC) Codes, Matrix

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