Time-varying spatially-coupled low-density paritycheck 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.
Girth Properties of Time-Varying SC-LDPC Convolutional Codes / Battaglioni, Massimo; Baldi, Marco; Chiaraluce, Franco; Lentmaier, Michael. - ELETTRONICO. - (2019), pp. 2599-2603. (Intervento presentato al convegno 2019 IEEE International Symposium on Information Theory tenutosi a Paris, France nel 7-12 July 2019) [10.1109/ISIT.2019.8849323].
Girth Properties of Time-Varying SC-LDPC Convolutional Codes
Massimo Battaglioni
;Marco Baldi;Franco Chiaraluce;
2019-01-01
Abstract
Time-varying spatially-coupled low-density paritycheck 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
