MacKay, DJC and Wilson, ST and Davey, MC (1999) Comparison of constructions of irregular Gallager codes. IEEE Transactions on Communications, 47. pp. 1449-1454. ISSN 0090-6778Full text not available from this repository.
The low-density parity check codes whose performance is closest to the Shannon limit are `Gallager codes' based on irregular graphs. We compare alternative methods for constructing these graphs and present two results. First, we find a `super-Poisson' construction which gives a small improvement in empirical performance over a random construction. Second, whereas Gallager codes normally take N2 time to encode, we investigate constructions of regular and irregular Gallager codes that allow more rapid encoding and have smaller memory requirements in the encoder. We find that these `fast encoding' Gallager codes have equally good performance.
|Divisions:||Div F > Machine Intelligence|
|Depositing User:||Cron Job|
|Date Deposited:||09 Dec 2016 17:39|
|Last Modified:||22 Feb 2017 00:07|