Free Distance Bounds for Protograph-Based Regular LDPC Convolutional Codes

In this paper asymptotic methods are used to form lower bounds on the free distance to constraint length ratio of several ensembles of regular, asymptotically good, protographbased LDPC convolutional codes. In particular, we show that the free distance to constraint length ratio of the regular LDPC convolutional codes exceeds that of the minimum distance to block length ratio of the corresponding LDPC block codes.

• Type: Journal
• Year: 2008
• Where: CORR
• Authors: David G. M. Mitchell, Ali Emre Pusane, Norbert Goertz, Daniel J. Costello Jr.
• Keywords: CORR 2008, Education, Free Distance, LDPC Convolutional Codes, Length Ratio