LDPC Codes

Contact Details

Dr. Sarah Johnson

Email

Phone

+61 2 49 21 6028

Fax

+61 2 49 21 6993

Office

Callaghan Campus
Building EA204

Post

Dr. Sarah Johnson

School of Electrical Engineering and Computer Science
University of Newcastle
Callaghan, NSW 2308
Australia

- - -

Funding

Australian Research Council

ARC Discovery Project
DP0665742
2006-2008
Value: $112,128

Australian Research Council

ARC Discovery Project
DP0449627
2004-2006
Value: $257,466

Australian Research Council

ARC Research Network
2004-2009
Value: $120,000

Australian Research Council

Discovery Project
DP0771131
2007-2009
Value: $210,000

Australian Research Council

Discovery Project
DP0877258
2008-2010
Value: $335,000

Australian Research Council

Discovery Project
DP1093114
2010-2012
Value: $150,000
This project investigates the design and decoding of low-density parity-check (LDPC) codes and a related class of codes called repeat-accumulate (RA) codes. This project includes an online implementation of density evolution and offers resources related to LDPC and RA codes.



The original image (encoded with a rate-1/2 LDPC code), and with noise added


Iterative decoder: the result after iterations 2, 4 and 20.

Contents

Background

What this project is all about.

Publications

Selected journal and conference papers together with internal technical reports.

Resources

Notes, software and useful links.

LDPC Online Density Evolution (LODE)

Find the threshold of your favorite LDPC or RA degree distribution, estimate its BER performance or plot its EXIT curves.

LDPC Online Optimisation (LOPT)

Find an LDPC or RA degree distribution with the best possible threshold.

Download an Introduction to LDPC Codes

  • This material was written for the ACoRN Spring School on Coding, Multiple User Communications and Random Matrix Theory, November 13-17 2006

    Introduction to LDPC codes

Read our latest paper

Maintained by Dr. Sarah Johnson
University of Newcastle
19 Jan 2010, © Copyright