On the Asymptotic Weight and Stopping Set Distribution of Regular LDPC Ensembles

Details On the Asymptotic Weight and Stopping Set Distribution of Regular LDPC Ensembles On the Asymptotic Weight and Stopping Set Distribution of Regular LDPC Ensembles

2005-12-15

arxiv.org/abs/cs/0512066v1

Computer Science

Information Theory

Submitted to IEEE Trans on Information Theory (revised version). Minor comments from reviewers addressed

Scientific paper

We estimate the variance of weight and stopping set distribution of regular LDPC ensembles. Using this estimate and the second moment method we obtain bounds on the probability that a randomly chosen code from regular LDPC ensemble has its weight distribution and stopping set distribution close to respective ensemble averages. We are able to show that a large fraction of total number of codes have their weight and stopping set distribution close to the average.

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