Technical Program

Paper Detail

Paper Title Girth Properties of Time-Varying SC-LDPC Convolutional Codes
Paper IdentifierFR1.R8.1
Authors Massimo Battaglioni, Marco Baldi, Franco Chiaraluce, Università Politecnica delle Marche, Italy; Michael Lentmaier, Lund University, Sweden
Session Low-density Parity-check II
Location Conseil, Level 5
Session Time Friday, 12 July, 09:50 - 11:10
Presentation Time Friday, 12 July, 09:50 - 10:10
Manuscript  Click here to download the manuscript
Abstract Time-varying spatially-coupled low-density parity-check convolutional codes (SC-LDPC-CCs) exhibit excellent features, but their representation requires a very large number of parameters. On the other hand, the description of time-invariant SC-LDPC-CCs is very convenient and their error rate performance, though usually worse, is often satisfactory. In this paper we investigate the girth properties of these codes, showing that the time-invariant ones have some weaknesses, which can be compensated by introducing a small periodicity in the code. By considering periodically time-varying codes, we achieve considerable improvements in the girth properties using few more degrees of freedom with respect to the time-invariant case.