Design and Implementation of Low Density Parity Check Codes
نویسندگان
چکیده
منابع مشابه
Design and Implementation of Low Density Parity Check Codes
This article explains the design and implementation of both regular and irregular LDPC codes as carried out by me at the Institute of Communications Engineering, Technical University of Munich. The design of a good irregular LDPC code needs a pair of distributions to be specified. This article discusses a randomized construction which attempts to form a parity check matrix whose row and coloumn...
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Low Density Parity Check Codes originally invented by Gallagher and subsequently rediscovered by multiple groups 30 years later has become the best known error correcting code in a variety of situations. In this paper, we review regular and irregular LDPC codes. We describe a number of message passing decoders for decoding these codes and explain their operation via examples. Density evolution,...
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A low-density parity-check code is a code specified by a parity-check matrix with the following properties : each column contains a small fixed numberj > 3 of I’s and each row contains a small fixed number k > j of 1’s. The typical minimum distance of these codes increases linearly with block length for a fixed rate and fixed j. When used with maximum likelihood decoding on a snfhciently quiet ...
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It has been shown earlier and rediscovered recently that Low-Density Parity Check Codes can achieve bit error rate near to Shannon limit. They can be decoded using soft decision iterative decoding scheme. As low cost, high performance DSPs are widespread, DSP implementation for LDPC decoder is a viable option. Floating point implementation has higher costs and so fixed point DSP implementation ...
متن کاملLow-density parity-check codes: Design and decoding
In this chapter, we treat code design and decoding for a family of error corWork supported by a CSIRO Telecommunications & Industrial Physics postgraduate scholarship and the Centre for Integrated Dynamics and Control (CIDAC). Work supported in part by Bell Laboratories Australia, Lucent Technologies, as well as the Australian Research Council under Linkage Project Grant LP0211210, and the Cent...
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ژورنال
عنوان ژورنال: IOSR Journal of Engineering
سال: 2014
ISSN: 2278-8719,2250-3021
DOI: 10.9790/3021-04922125