On the search for self-doubly orthogonal codes

In this paper we present the search and determination of a subset of orthogonal convolutional codes called convolutional self doubly orthogonal codes (CSO²C). These codes may be advantageously utilised for the novel coding/iterative decoding technique introduced as an important amelioration of turbo codes. For this technique the code constraint length corresponds to the latency of each decoding iteration. Hence, an important parameter in the code searching is the minimisation of the code constraint length for a given error correcting capability