By Topic

Design and performance evaluation of some high-rate irregular low-density parity-check codes

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Chiani, M. ; Dipt. di Elettronica, Inf. e Sistemistica, Bologna Univ., Italy ; Ventura, A.

The irregular low-density parity-check codes (LDPCC) have been proposed by Richardson, Shokrollahi and Urbanke (see IEEE Trans. on Inf. Theory), in many cases outperforming the best known turbo-codes. These results have been obtained by allowing the degree of nodes (variable or check) of a LDPCC to vary according to some distribution. We give new distributions to design high rate irregular LDPCC, more precisely rates 7/8, 8/9 and 15/16, motivated by applications to space data communication. Then, we investigate the performance of these new codes over AWGN channels, for different codeword lengths. The error rates obtained are always less than 1 dB from the channel capacity, and in most cases better than the results obtained by turbo-codes with the same parameters. Finally, we investigate, by means of an original method, the minimum distance of irregular LDPCC. The results show that irregular LDPCC have quite low minimum distance, giving rise, similarly to turbo-codes, to the "error floor" phenomenon

Published in:

Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE  (Volume:2 )

Date of Conference:

2001